[INFO] cloning repository https://github.com/headironc/rustlings
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/headironc/rustlings" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fheadironc%2Frustlings", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fheadironc%2Frustlings'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0847b3a4bfeebd0d18578de8f45b7e4571fc6e77
[INFO] testing headironc/rustlings against 1.90.0 for beta-1.91-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fheadironc%2Frustlings" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/headironc/rustlings
[INFO] finished tweaking git repo https://github.com/headironc/rustlings
[INFO] tweaked toml for git repo https://github.com/headironc/rustlings written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/headironc/rustlings on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/headironc/rustlings already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c97a93055272594ccf60155f56ea1826ec542d6ca63cb065e394af52937e3ec8
[INFO] running `Command { std: "docker" "start" "-a" "c97a93055272594ccf60155f56ea1826ec542d6ca63cb065e394af52937e3ec8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c97a93055272594ccf60155f56ea1826ec542d6ca63cb065e394af52937e3ec8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c97a93055272594ccf60155f56ea1826ec542d6ca63cb065e394af52937e3ec8", kill_on_drop: false }`
[INFO] [stdout] c97a93055272594ccf60155f56ea1826ec542d6ca63cb065e394af52937e3ec8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e0e1564db55b46124c83da59ffb0035092b1e150229cc14e9a509cd976ba0af1
[INFO] running `Command { std: "docker" "start" "-a" "e0e1564db55b46124c83da59ffb0035092b1e150229cc14e9a509cd976ba0af1", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling serde v1.0.204
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling rustversion v1.0.17
[INFO] [stderr]    Compiling autocfg v1.3.0
[INFO] [stderr]    Compiling once_cell v1.19.0
[INFO] [stderr]    Compiling zerocopy v0.7.35
[INFO] [stderr]    Compiling log v0.4.22
[INFO] [stderr]    Compiling parking_lot_core v0.9.10
[INFO] [stderr]    Compiling heck v0.5.0
[INFO] [stderr]    Compiling signal-hook v0.3.17
[INFO] [stderr]    Compiling crossbeam-utils v0.8.20
[INFO] [stderr]    Compiling allocator-api2 v0.2.18
[INFO] [stderr]    Compiling utf8parse v0.2.2
[INFO] [stderr]    Compiling scopeguard v1.2.0
[INFO] [stderr]    Compiling smallvec v1.13.2
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[INFO] [stderr]    Compiling anstyle-parse v0.2.4
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[INFO] [stderr]    Compiling walkdir v2.5.0
[INFO] [stderr]    Compiling anyhow v1.0.86
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[INFO] [stderr]    Compiling itertools v0.13.0
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stderr]    Compiling unicode-width v0.1.13
[INFO] [stderr]    Compiling ahash v0.8.11
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[INFO] [stderr]    Compiling winnow v0.6.13
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]    Compiling clap_lex v0.7.1
[INFO] [stderr]    Compiling quote v1.0.36
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[INFO] [stderr]    Compiling inotify-sys v0.1.5
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[INFO] [stderr]    Compiling filetime v0.2.23
[INFO] [stderr]    Compiling crossbeam-channel v0.5.13
[INFO] [stderr]    Compiling syn v2.0.70
[INFO] [stderr]    Compiling parking_lot v0.12.3
[INFO] [stderr]    Compiling cassowary v0.3.0
[INFO] [stderr]    Compiling castaway v0.2.3
[INFO] [stderr]    Compiling signal-hook-mio v0.2.3
[INFO] [stderr]    Compiling crossterm v0.27.0
[INFO] [stderr]    Compiling compact_str v0.7.1
[INFO] [stderr]    Compiling notify v6.1.1
[INFO] [stderr]    Compiling os_pipe v1.2.0
[INFO] [stderr]    Compiling lru v0.12.3
[INFO] [stderr]    Compiling notify-debouncer-mini v0.4.1
[INFO] [stderr]    Compiling unicode-truncate v1.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.204
[INFO] [stderr]    Compiling strum_macros v0.26.4
[INFO] [stderr]    Compiling stability v0.2.1
[INFO] [stderr]    Compiling clap_derive v4.5.8
[INFO] [stderr]    Compiling strum v0.26.3
[INFO] [stderr]    Compiling ratatui v0.27.0
[INFO] [stderr]    Compiling clap v4.5.9
[INFO] [stderr]    Compiling toml_datetime v0.6.6
[INFO] [stderr]    Compiling serde_spanned v0.6.6
[INFO] [stderr]    Compiling toml_edit v0.22.15
[INFO] [stderr]    Compiling rustlings-macros v6.1.0 (/opt/rustwide/workdir/rustlings-macros)
[INFO] [stderr]    Compiling rustlings v6.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 29.76s
[INFO] running `Command { std: "docker" "inspect" "e0e1564db55b46124c83da59ffb0035092b1e150229cc14e9a509cd976ba0af1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0e1564db55b46124c83da59ffb0035092b1e150229cc14e9a509cd976ba0af1", kill_on_drop: false }`
[INFO] [stdout] e0e1564db55b46124c83da59ffb0035092b1e150229cc14e9a509cd976ba0af1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ea3136c4c8dc919816198b6ce22937bf133d44e778397dd83429df965013b319
[INFO] running `Command { std: "docker" "start" "-a" "ea3136c4c8dc919816198b6ce22937bf133d44e778397dd83429df965013b319", kill_on_drop: false }`
[INFO] [stderr]    Compiling once_cell v1.19.0
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]    Compiling memchr v2.7.4
[INFO] [stderr]    Compiling zerocopy v0.7.35
[INFO] [stderr]    Compiling equivalent v1.0.1
[INFO] [stderr]    Compiling log v0.4.22
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling regex-syntax v0.8.4
[INFO] [stderr]    Compiling allocator-api2 v0.2.18
[INFO] [stderr]    Compiling anstyle v1.0.7
[INFO] [stderr]    Compiling scopeguard v1.2.0
[INFO] [stderr]    Compiling utf8parse v0.2.2
[INFO] [stderr]    Compiling smallvec v1.13.2
[INFO] [stderr]    Compiling serde v1.0.204
[INFO] [stderr]    Compiling winnow v0.6.13
[INFO] [stderr]    Compiling crossbeam-utils v0.8.20
[INFO] [stderr]    Compiling indexmap v2.2.6
[INFO] [stderr]    Compiling anstyle-parse v0.2.4
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stderr]    Compiling predicates-core v1.0.6
[INFO] [stderr]    Compiling anstyle-query v1.1.0
[INFO] [stderr]    Compiling itoa v1.0.11
[INFO] [stderr]    Compiling either v1.13.0
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling colorchoice v1.0.1
[INFO] [stderr]    Compiling is_terminal_polyfill v1.70.0
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling ryu v1.0.18
[INFO] [stderr]    Compiling walkdir v2.5.0
[INFO] [stderr]    Compiling mio v0.8.11
[INFO] [stderr]    Compiling signal-hook-registry v1.4.2
[INFO] [stderr]    Compiling inotify-sys v0.1.5
[INFO] [stderr]    Compiling parking_lot_core v0.9.10
[INFO] [stderr]    Compiling ahash v0.8.11
[INFO] [stderr]    Compiling inotify v0.9.6
[INFO] [stderr]    Compiling anstream v0.6.14
[INFO] [stderr]    Compiling filetime v0.2.23
[INFO] [stderr]    Compiling itertools v0.13.0
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]    Compiling hashbrown v0.14.5
[INFO] [stderr]    Compiling signal-hook v0.3.17
[INFO] [stderr]    Compiling crossbeam-channel v0.5.13
[INFO] [stderr]    Compiling parking_lot v0.12.3
[INFO] [stderr]    Compiling castaway v0.2.3
[INFO] [stderr]    Compiling difflib v0.4.0
[INFO] [stderr]    Compiling unicode-width v0.1.13
[INFO] [stderr]    Compiling float-cmp v0.9.0
[INFO] [stderr]    Compiling signal-hook-mio v0.2.3
[INFO] [stderr]    Compiling unicode-segmentation v1.11.0
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]    Compiling assert_cmd v2.0.14
[INFO] [stderr]    Compiling termtree v0.4.1
[INFO] [stderr]    Compiling clap_lex v0.7.1
[INFO] [stderr]    Compiling normalize-line-endings v0.3.0
[INFO] [stderr]    Compiling strsim v0.11.1
[INFO] [stderr]    Compiling bitflags v2.6.0
[INFO] [stderr]    Compiling predicates-tree v1.0.9
[INFO] [stderr]    Compiling notify v6.1.1
[INFO] [stderr]    Compiling crossterm v0.27.0
[INFO] [stderr]    Compiling compact_str v0.7.1
[INFO] [stderr]    Compiling clap_builder v4.5.9
[INFO] [stderr]    Compiling lru v0.12.3
[INFO] [stderr]    Compiling wait-timeout v0.2.0
[INFO] [stderr]    Compiling strum v0.26.3
[INFO] [stderr]    Compiling cassowary v0.3.0
[INFO] [stderr]    Compiling os_pipe v1.2.0
[INFO] [stderr]    Compiling anyhow v1.0.86
[INFO] [stderr]    Compiling notify-debouncer-mini v0.4.1
[INFO] [stderr]    Compiling regex-automata v0.4.7
[INFO] [stderr]    Compiling unicode-truncate v1.1.0
[INFO] [stderr]    Compiling ratatui v0.27.0
[INFO] [stderr]    Compiling toml_datetime v0.6.6
[INFO] [stderr]    Compiling serde_spanned v0.6.6
[INFO] [stderr]    Compiling serde_json v1.0.120
[INFO] [stderr]    Compiling toml_edit v0.22.15
[INFO] [stderr]    Compiling clap v4.5.9
[INFO] [stderr]    Compiling regex v1.10.5
[INFO] [stderr]    Compiling bstr v1.9.1
[INFO] [stderr]    Compiling rustlings-macros v6.1.0 (/opt/rustwide/workdir/rustlings-macros)
[INFO] [stderr]    Compiling predicates v3.1.0
[INFO] [stderr]    Compiling rustlings v6.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 28.82s
[INFO] running `Command { std: "docker" "inspect" "ea3136c4c8dc919816198b6ce22937bf133d44e778397dd83429df965013b319", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea3136c4c8dc919816198b6ce22937bf133d44e778397dd83429df965013b319", kill_on_drop: false }`
[INFO] [stdout] ea3136c4c8dc919816198b6ce22937bf133d44e778397dd83429df965013b319
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 25e218cab960ce579383fd7cc23c78684f17ddbc52b44bdfa61422ab88d40c32
[INFO] running `Command { std: "docker" "start" "-a" "25e218cab960ce579383fd7cc23c78684f17ddbc52b44bdfa61422ab88d40c32", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.13s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rustlings-022d07dc11633cc5)
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test app_state::tests::next_pending_exercise ... ok
[INFO] [stdout] test cargo_toml::tests::test_bins ... ok
[INFO] [stdout] test cargo_toml::tests::test_bins_start_end_ind ... ok
[INFO] [stdout] test cmd::tests::test_run_cmd ... ok
[INFO] [stdout] test embedded::tests::dirs ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/integration_tests.rs (/opt/rustwide/target/debug/deps/integration_tests-bc49bebbf4f53a31)
[INFO] [stdout] 
[INFO] [stdout] running 13 tests
[INFO] [stdout] test reset_no_exercise ... ok
[INFO] [stdout] test fails_when_in_wrong_dir ... ok
[INFO] [stdout] test run_single_test_not_passed ... ok
[INFO] [stdout] test run_single_compile_failure ... ok
[INFO] [stdout] test run_single_test_no_exercise ... ok
[INFO] [stdout] test reset_single_exercise ... FAILED
[INFO] [stdout] test run_compile_exercise_does_not_prompt ... FAILED
[INFO] [stdout] test run_single_test_success_with_output ... FAILED
[INFO] [stdout] test run_single_compile_success ... FAILED
[INFO] [stdout] test get_hint_for_single_test ... FAILED
[INFO] [stdout] test run_test_exercise_does_not_prompt ... FAILED
[INFO] [stdout] test run_single_test_failure ... ok
[INFO] [stdout] test run_single_test_success ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- reset_single_exercise stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'reset_single_exercise' panicked at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5:
[INFO] [stdout] Unexpected return code, failed var == 0
[INFO] [stdout] └── var: 1
[INFO] [stdout] 
[INFO] [stdout] command=`"/opt/rustwide/target/debug/rustlings" "reset" "intro1"`
[INFO] [stdout] code=1
[INFO] [stdout] stdout=```
[INFO] [stdout] \u{1b}[H\u{1b}[2J\u{1b}[3JIs this your first time? Don\'t worry, Rustlings is made for beginners!
[INFO] [stdout] We are going to teach you a lot of things about Rust, but before we can
[INFO] [stdout] get started, here are some notes about how Rustlings operates:
[INFO] [stdout] 
[INFO] [stdout] 1. The central concept behind Rustlings is that you solve exercises. These
[INFO] [stdout]    exercises usually contain some compiler or logic errors which cause the
[INFO] [stdout]    exercise to fail compilation or testing. It\'s your job to find all errors
[INFO] [stdout]    and fix them!
[INFO] [stdout] 2. Make sure to have your editor open in the `rustlings/` directory. Rustlings
[INFO] [stdout]    will show you the path of the current exercise under the progress bar. Open
[INFO] [stdout]    the exercise file in your editor, fix errors and save the file. Rustlings will
[INFO] [stdout]    automatically detect the file change and rerun the exercise. If all errors are
[INFO] [stdout]    fixed, Rustlings will ask you to move on to the next exercise.
[INFO] [stdout] 3. If you\'re stuck on an exercise, enter `h` to show a hint.
[INFO] [stdout] 4. If an exercise doesn\'t make sense to you, feel free to open an issue on GitHub!
[INFO] [stdout]    (https://github.com/rust-lang/rustlings). We look at every issue, and sometimes,
[INFO] [stdout]    other learners do too so you can help each other out!
[INFO] [stdout] 
[INFO] [stdout] Press ENTER to continue \u{1b}[H\u{1b}[2J\u{1b}[3J```
[INFO] [stdout] 
[INFO] [stdout] stderr=```
[INFO] [stdout] Error: Failed to write the state file .rustlings-state.txt
[INFO] [stdout] 
[INFO] [stdout] Caused by:
[INFO] [stdout]     Read-only file system (os error 30)
[INFO] [stdout] 
[INFO] [stdout] Stack backtrace:
[INFO] [stdout]    0: <E as anyhow::context::ext::StdError>::ext_context
[INFO] [stdout]              at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/anyhow-1.0.86/src/backtrace.rs:27:14
[INFO] [stdout]    1: anyhow::context::<impl anyhow::Context<T,E> for core::result::Result<T,E>>::with_context
[INFO] [stdout]              at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/anyhow-1.0.86/src/context.rs:65:37
[INFO] [stdout]    2: rustlings::app_state::AppState::write
[INFO] [stdout]              at ./src/app_state.rs:218:14
[INFO] [stdout]    3: rustlings::app_state::AppState::set_current_exercise_by_name
[INFO] [stdout]              at ./src/app_state.rs:246:14
[INFO] [stdout]    4: rustlings::main
[INFO] [stdout]              at ./src/main.rs:187:23
[INFO] [stdout]    5: core::ops::function::FnOnce::call_once
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]    6: std::sys::backtrace::__rust_begin_short_backtrace
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]    7: std::rt::lang_start::{{closure}}
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:206:18
[INFO] [stdout]    8: core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:290:21
[INFO] [stdout]    9: std::panicking::catch_unwind::do_call
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   10: std::panicking::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   11: std::panic::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   12: std::rt::lang_start_internal::{{closure}}
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:175:24
[INFO] [stdout]   13: std::panicking::catch_unwind::do_call
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   14: std::panicking::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   15: std::panic::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   16: std::rt::lang_start_internal
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:171:5
[INFO] [stdout]   17: std::rt::lang_start
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:205:5
[INFO] [stdout]   18: main
[INFO] [stdout]   19: <unknown>
[INFO] [stdout]   20: __libc_start_main
[INFO] [stdout]   21: _start
[INFO] [stdout] ```
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5630ed9d4822 - std::backtrace_rs::backtrace::libunwind::trace::h2d45396358f41939
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x5630ed9d4822 - std::backtrace_rs::backtrace::trace_unsynchronized::hffcefc0b67f1d6e2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x5630ed9d4822 - std::sys::backtrace::_print_fmt::hd72f71d23b436b92
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x5630ed9d4822 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hdcfcb6d4c8489523
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x5630ed9fbe13 - core::fmt::rt::Argument::fmt::h2c56b3114963061a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x5630ed9fbe13 - core::fmt::write::h8a494366950f23bb
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/mod.rs:1468:25
[INFO] [stdout]    6:     0x5630ed9d1403 - std::io::default_write_fmt::h7b8824096454f323
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x5630ed9d1403 - std::io::Write::write_fmt::h4e71294925c334d0
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:1954:13
[INFO] [stdout]    8:     0x5630ed9d4672 - std::sys::backtrace::BacktraceLock::print::hb2a626a81e06b2dc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x5630ed9d5e19 - std::panicking::default_hook::{{closure}}::h4f78485264f12d10
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:300:27
[INFO] [stdout]   10:     0x5630ed9d5c4e - std::panicking::default_hook::h2c66fc99e962531d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:324:9
[INFO] [stdout]   11:     0x5630ed940c14 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hb6bd65493727d71a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   12:     0x5630ed940c14 - test::test_main_with_exit_callback::{{closure}}::h60217ec76a0ece4a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x5630ed9d67ee - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h318e4efb8c1a5689
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   14:     0x5630ed9d67ee - std::panicking::rust_panic_with_hook::h33ac55f64bbd807d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:841:13
[INFO] [stdout]   15:     0x5630ed9d65ba - std::panicking::begin_panic_handler::{{closure}}::h30e7cb89678a57fe
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:706:13
[INFO] [stdout]   16:     0x5630ed9d4d19 - std::sys::backtrace::__rust_end_short_backtrace::hed60f27456c16ced
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:174:18
[INFO] [stdout]   17:     0x5630ed9d624d - __rustc[de2ca18b4c54d5b8]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:697:5
[INFO] [stdout]   18:     0x5630ed9fa590 - core::panicking::panic_fmt::h62f63d096dd276af
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:75:14
[INFO] [stdout]   19:     0x5630ed95abc0 - core::panicking::panic_display::hb8cea7e542d01080
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:268:5
[INFO] [stdout]   20:     0x5630ed95080b - assert_cmd::assert::AssertError::panic::panic_cold_display::habfb26aeb3b0675d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic.rs:100:13
[INFO] [stdout]   21:     0x5630ed9502f7 - assert_cmd::assert::AssertError::panic::he58e64f7a218bc0d
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/assert_cmd-2.0.14/src/assert.rs:1033:9
[INFO] [stdout]   22:     0x5630ed956327 - core::ops::function::FnOnce::call_once::h5f40864c0ec6e66d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   23:     0x5630ed957503 - core::result::Result<T,E>::unwrap_or_else::hcd48fac9fdd895b8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/result.rs:1525:23
[INFO] [stdout]   24:     0x5630ed90319a - assert_cmd::assert::Assert::code::h848919ecb1953372
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/assert_cmd-2.0.14/src/assert.rs:266:29
[INFO] [stdout]   25:     0x5630ed906a49 - integration_tests::reset_single_exercise::h76e4a47c0210f807
[INFO] [stdout]                                at /opt/rustwide/workdir/tests/integration_tests.rs:79:10
[INFO] [stdout]   26:     0x5630ed906897 - integration_tests::reset_single_exercise::{{closure}}::hb6ff98e85d9790d4
[INFO] [stdout]                                at /opt/rustwide/workdir/tests/integration_tests.rs:74:27
[INFO] [stdout]   27:     0x5630ed904546 - core::ops::function::FnOnce::call_once::h917a9350946a646d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   28:     0x5630ed94647b - core::ops::function::FnOnce::call_once::h1f9474f1347fff52
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   29:     0x5630ed94647b - test::__rust_begin_short_backtrace::ha52ab26e77157f03
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:648:18
[INFO] [stdout]   30:     0x5630ed9455b5 - test::run_test_in_process::{{closure}}::h229c1a11a50b261f
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:671:74
[INFO] [stdout]   31:     0x5630ed9455b5 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h78821afbf97b39a9
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   32:     0x5630ed9455b5 - std::panicking::catch_unwind::do_call::h53abf3ed5bd32ba3
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   33:     0x5630ed9455b5 - std::panicking::catch_unwind::h6deb5fe1e91873c9
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   34:     0x5630ed9455b5 - std::panic::catch_unwind::hea0829b6b565654b
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   35:     0x5630ed9455b5 - test::run_test_in_process::hdc44dfecea3db21b
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:671:27
[INFO] [stdout]   36:     0x5630ed9455b5 - test::run_test::{{closure}}::h0364ba59bf23f652
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:592:43
[INFO] [stdout]   37:     0x5630ed9091b4 - test::run_test::{{closure}}::h32730b304eec05da
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:622:41
[INFO] [stdout]   38:     0x5630ed9091b4 - std::sys::backtrace::__rust_begin_short_backtrace::h177cb952fc54ad2c
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]   39:     0x5630ed90cb8a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h119d903520007597
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   40:     0x5630ed90cb8a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hab88401d606702a6
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   41:     0x5630ed90cb8a - std::panicking::catch_unwind::do_call::h163fe12cca9901c2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   42:     0x5630ed90cb8a - std::panicking::catch_unwind::he81557d0e17cc1bc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   43:     0x5630ed90cb8a - std::panic::catch_unwind::hc2b8e79c20593955
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   44:     0x5630ed90cb8a - std::thread::Builder::spawn_unchecked_::{{closure}}::hfa6b4978e07815cc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   45:     0x5630ed90cb8a - core::ops::function::FnOnce::call_once{{vtable.shim}}::hddcd7484a13fd793
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   46:     0x5630ed9d976f - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h5924238c754de3b8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1971:9
[INFO] [stdout]   47:     0x5630ed9d976f - std::sys::pal::unix::thread::Thread::new::thread_start::hb6e99e73da4d28f8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/pal/unix/thread.rs:107:17
[INFO] [stdout]   48:     0x7294cedf3aa4 - <unknown>
[INFO] [stdout]   49:     0x7294cee80a34 - clone
[INFO] [stdout]   50:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- run_compile_exercise_does_not_prompt stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'run_compile_exercise_does_not_prompt' panicked at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5:
[INFO] [stdout] Unexpected return code, failed var == 0
[INFO] [stdout] └── var: 1
[INFO] [stdout] 
[INFO] [stdout] command=`cd "tests/fixture/state" && "/opt/rustwide/target/debug/rustlings" "run" "pending_exercise"`
[INFO] [stdout] code=1
[INFO] [stdout] stdout=""
[INFO] [stdout] stderr=```
[INFO] [stdout] Error: Failed to write the state file .rustlings-state.txt
[INFO] [stdout] 
[INFO] [stdout] Caused by:
[INFO] [stdout]     Read-only file system (os error 30)
[INFO] [stdout] 
[INFO] [stdout] Stack backtrace:
[INFO] [stdout]    0: <E as anyhow::context::ext::StdError>::ext_context
[INFO] [stdout]              at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/anyhow-1.0.86/src/backtrace.rs:27:14
[INFO] [stdout]    1: anyhow::context::<impl anyhow::Context<T,E> for core::result::Result<T,E>>::with_context
[INFO] [stdout]              at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/anyhow-1.0.86/src/context.rs:65:37
[INFO] [stdout]    2: rustlings::app_state::AppState::write
[INFO] [stdout]              at /opt/rustwide/workdir/src/app_state.rs:218:14
[INFO] [stdout]    3: rustlings::app_state::AppState::set_current_exercise_by_name
[INFO] [stdout]              at /opt/rustwide/workdir/src/app_state.rs:246:14
[INFO] [stdout]    4: rustlings::main
[INFO] [stdout]              at /opt/rustwide/workdir/src/main.rs:182:27
[INFO] [stdout]    5: core::ops::function::FnOnce::call_once
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]    6: std::sys::backtrace::__rust_begin_short_backtrace
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]    7: std::rt::lang_start::{{closure}}
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:206:18
[INFO] [stdout]    8: core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:290:21
[INFO] [stdout]    9: std::panicking::catch_unwind::do_call
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   10: std::panicking::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   11: std::panic::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   12: std::rt::lang_start_internal::{{closure}}
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:175:24
[INFO] [stdout]   13: std::panicking::catch_unwind::do_call
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   14: std::panicking::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   15: std::panic::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   16: std::rt::lang_start_internal
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:171:5
[INFO] [stdout]   17: std::rt::lang_start
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:205:5
[INFO] [stdout]   18: main
[INFO] [stdout]   19: <unknown>
[INFO] [stdout]   20: __libc_start_main
[INFO] [stdout]   21: _start
[INFO] [stdout] ```
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5630ed9d4822 - std::backtrace_rs::backtrace::libunwind::trace::h2d45396358f41939
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x5630ed9d4822 - std::backtrace_rs::backtrace::trace_unsynchronized::hffcefc0b67f1d6e2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x5630ed9d4822 - std::sys::backtrace::_print_fmt::hd72f71d23b436b92
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x5630ed9d4822 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hdcfcb6d4c8489523
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x5630ed9fbe13 - core::fmt::rt::Argument::fmt::h2c56b3114963061a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x5630ed9fbe13 - core::fmt::write::h8a494366950f23bb
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/mod.rs:1468:25
[INFO] [stdout]    6:     0x5630ed9d1403 - std::io::default_write_fmt::h7b8824096454f323
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x5630ed9d1403 - std::io::Write::write_fmt::h4e71294925c334d0
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:1954:13
[INFO] [stdout]    8:     0x5630ed9d4672 - std::sys::backtrace::BacktraceLock::print::hb2a626a81e06b2dc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x5630ed9d5e19 - std::panicking::default_hook::{{closure}}::h4f78485264f12d10
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:300:27
[INFO] [stdout]   10:     0x5630ed9d5c4e - std::panicking::default_hook::h2c66fc99e962531d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:324:9
[INFO] [stdout]   11:     0x5630ed940c14 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hb6bd65493727d71a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   12:     0x5630ed940c14 - test::test_main_with_exit_callback::{{closure}}::h60217ec76a0ece4a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x5630ed9d67ee - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h318e4efb8c1a5689
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   14:     0x5630ed9d67ee - std::panicking::rust_panic_with_hook::h33ac55f64bbd807d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:841:13
[INFO] [stdout]   15:     0x5630ed9d65ba - std::panicking::begin_panic_handler::{{closure}}::h30e7cb89678a57fe
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:706:13
[INFO] [stdout]   16:     0x5630ed9d4d19 - std::sys::backtrace::__rust_end_short_backtrace::hed60f27456c16ced
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:174:18
[INFO] [stdout]   17:     0x5630ed9d624d - __rustc[de2ca18b4c54d5b8]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:697:5
[INFO] [stdout]   18:     0x5630ed9fa590 - core::panicking::panic_fmt::h62f63d096dd276af
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:75:14
[INFO] [stdout]   19:     0x5630ed95abc0 - core::panicking::panic_display::hb8cea7e542d01080
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:268:5
[INFO] [stdout]   20:     0x5630ed95080b - assert_cmd::assert::AssertError::panic::panic_cold_display::habfb26aeb3b0675d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic.rs:100:13
[INFO] [stdout]   21:     0x5630ed9502f7 - assert_cmd::assert::AssertError::panic::he58e64f7a218bc0d
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/assert_cmd-2.0.14/src/assert.rs:1033:9
[INFO] [stdout]   22:     0x5630ed956327 - core::ops::function::FnOnce::call_once::h5f40864c0ec6e66d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   23:     0x5630ed957503 - core::result::Result<T,E>::unwrap_or_else::hcd48fac9fdd895b8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/result.rs:1525:23
[INFO] [stdout]   24:     0x5630ed90319a - assert_cmd::assert::Assert::code::h848919ecb1953372
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/assert_cmd-2.0.14/src/assert.rs:266:29
[INFO] [stdout]   25:     0x5630ed90715b - integration_tests::run_compile_exercise_does_not_prompt::hd8ff4526365f10a0
[INFO] [stdout]                                at /opt/rustwide/workdir/tests/integration_tests.rs:112:10
[INFO] [stdout]   26:     0x5630ed906f87 - integration_tests::run_compile_exercise_does_not_prompt::{{closure}}::h84353ef0f956757e
[INFO] [stdout]                                at /opt/rustwide/workdir/tests/integration_tests.rs:106:42
[INFO] [stdout]   27:     0x5630ed9045c6 - core::ops::function::FnOnce::call_once::ha15f30d13121c3ba
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   28:     0x5630ed94647b - core::ops::function::FnOnce::call_once::h1f9474f1347fff52
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   29:     0x5630ed94647b - test::__rust_begin_short_backtrace::ha52ab26e77157f03
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:648:18
[INFO] [stdout]   30:     0x5630ed9455b5 - test::run_test_in_process::{{closure}}::h229c1a11a50b261f
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:671:74
[INFO] [stdout]   31:     0x5630ed9455b5 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h78821afbf97b39a9
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   32:     0x5630ed9455b5 - std::panicking::catch_unwind::do_call::h53abf3ed5bd32ba3
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   33:     0x5630ed9455b5 - std::panicking::catch_unwind::h6deb5fe1e91873c9
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   34:     0x5630ed9455b5 - std::panic::catch_unwind::hea0829b6b565654b
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   35:     0x5630ed9455b5 - test::run_test_in_process::hdc44dfecea3db21b
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:671:27
[INFO] [stdout]   36:     0x5630ed9455b5 - test::run_test::{{closure}}::h0364ba59bf23f652
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:592:43
[INFO] [stdout]   37:     0x5630ed9091b4 - test::run_test::{{closure}}::h32730b304eec05da
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:622:41
[INFO] [stdout]   38:     0x5630ed9091b4 - std::sys::backtrace::__rust_begin_short_backtrace::h177cb952fc54ad2c
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]   39:     0x5630ed90cb8a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h119d903520007597
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   40:     0x5630ed90cb8a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hab88401d606702a6
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   41:     0x5630ed90cb8a - std::panicking::catch_unwind::do_call::h163fe12cca9901c2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   42:     0x5630ed90cb8a - std::panicking::catch_unwind::he81557d0e17cc1bc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   43:     0x5630ed90cb8a - std::panic::catch_unwind::hc2b8e79c20593955
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   44:     0x5630ed90cb8a - std::thread::Builder::spawn_unchecked_::{{closure}}::hfa6b4978e07815cc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   45:     0x5630ed90cb8a - core::ops::function::FnOnce::call_once{{vtable.shim}}::hddcd7484a13fd793
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   46:     0x5630ed9d976f - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h5924238c754de3b8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1971:9
[INFO] [stdout]   47:     0x5630ed9d976f - std::sys::pal::unix::thread::Thread::new::thread_start::hb6e99e73da4d28f8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/pal/unix/thread.rs:107:17
[INFO] [stdout]   48:     0x7294cedf3aa4 - <unknown>
[INFO] [stdout]   49:     0x7294cee80a34 - clone
[INFO] [stdout]   50:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- run_single_test_success_with_output stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'run_single_test_success_with_output' panicked at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5:
[INFO] [stdout] Unexpected return code, failed var == 0
[INFO] [stdout] └── var: 1
[INFO] [stdout] 
[INFO] [stdout] command=`cd "tests/fixture/success/" && "/opt/rustwide/target/debug/rustlings" "run" "testSuccess"`
[INFO] [stdout] code=1
[INFO] [stdout] stdout=""
[INFO] [stdout] stderr=```
[INFO] [stdout] Error: Failed to write the state file .rustlings-state.txt
[INFO] [stdout] 
[INFO] [stdout] Caused by:
[INFO] [stdout]     Read-only file system (os error 30)
[INFO] [stdout] 
[INFO] [stdout] Stack backtrace:
[INFO] [stdout]    0: <E as anyhow::context::ext::StdError>::ext_context
[INFO] [stdout]              at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/anyhow-1.0.86/src/backtrace.rs:27:14
[INFO] [stdout]    1: anyhow::context::<impl anyhow::Context<T,E> for core::result::Result<T,E>>::with_context
[INFO] [stdout]              at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/anyhow-1.0.86/src/context.rs:65:37
[INFO] [stdout]    2: rustlings::app_state::AppState::write
[INFO] [stdout]              at /opt/rustwide/workdir/src/app_state.rs:218:14
[INFO] [stdout]    3: rustlings::app_state::AppState::set_current_exercise_by_name
[INFO] [stdout]              at /opt/rustwide/workdir/src/app_state.rs:246:14
[INFO] [stdout]    4: rustlings::main
[INFO] [stdout]              at /opt/rustwide/workdir/src/main.rs:182:27
[INFO] [stdout]    5: core::ops::function::FnOnce::call_once
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]    6: std::sys::backtrace::__rust_begin_short_backtrace
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]    7: std::rt::lang_start::{{closure}}
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:206:18
[INFO] [stdout]    8: core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:290:21
[INFO] [stdout]    9: std::panicking::catch_unwind::do_call
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   10: std::panicking::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   11: std::panic::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   12: std::rt::lang_start_internal::{{closure}}
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:175:24
[INFO] [stdout]   13: std::panicking::catch_unwind::do_call
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   14: std::panicking::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   15: std::panic::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   16: std::rt::lang_start_internal
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:171:5
[INFO] [stdout]   17: std::rt::lang_start
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:205:5
[INFO] [stdout]   18: main
[INFO] [stdout]   19: <unknown>
[INFO] [stdout]   20: __libc_start_main
[INFO] [stdout]   21: _start
[INFO] [stdout] ```
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5630ed9d4822 - std::backtrace_rs::backtrace::libunwind::trace::h2d45396358f41939
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x5630ed9d4822 - std::backtrace_rs::backtrace::trace_unsynchronized::hffcefc0b67f1d6e2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x5630ed9d4822 - std::sys::backtrace::_print_fmt::hd72f71d23b436b92
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x5630ed9d4822 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hdcfcb6d4c8489523
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x5630ed9fbe13 - core::fmt::rt::Argument::fmt::h2c56b3114963061a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x5630ed9fbe13 - core::fmt::write::h8a494366950f23bb
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/mod.rs:1468:25
[INFO] [stdout]    6:     0x5630ed9d1403 - std::io::default_write_fmt::h7b8824096454f323
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x5630ed9d1403 - std::io::Write::write_fmt::h4e71294925c334d0
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:1954:13
[INFO] [stdout]    8:     0x5630ed9d4672 - std::sys::backtrace::BacktraceLock::print::hb2a626a81e06b2dc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x5630ed9d5e19 - std::panicking::default_hook::{{closure}}::h4f78485264f12d10
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:300:27
[INFO] [stdout]   10:     0x5630ed9d5c4e - std::panicking::default_hook::h2c66fc99e962531d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:324:9
[INFO] [stdout]   11:     0x5630ed940c14 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hb6bd65493727d71a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   12:     0x5630ed940c14 - test::test_main_with_exit_callback::{{closure}}::h60217ec76a0ece4a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x5630ed9d67ee - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h318e4efb8c1a5689
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   14:     0x5630ed9d67ee - std::panicking::rust_panic_with_hook::h33ac55f64bbd807d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:841:13
[INFO] [stdout]   15:     0x5630ed9d65ba - std::panicking::begin_panic_handler::{{closure}}::h30e7cb89678a57fe
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:706:13
[INFO] [stdout]   16:     0x5630ed9d4d19 - std::sys::backtrace::__rust_end_short_backtrace::hed60f27456c16ced
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:174:18
[INFO] [stdout]   17:     0x5630ed9d624d - __rustc[de2ca18b4c54d5b8]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:697:5
[INFO] [stdout]   18:     0x5630ed9fa590 - core::panicking::panic_fmt::h62f63d096dd276af
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:75:14
[INFO] [stdout]   19:     0x5630ed95abc0 - core::panicking::panic_display::hb8cea7e542d01080
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:268:5
[INFO] [stdout]   20:     0x5630ed95080b - assert_cmd::assert::AssertError::panic::panic_cold_display::habfb26aeb3b0675d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic.rs:100:13
[INFO] [stdout]   21:     0x5630ed9502f7 - assert_cmd::assert::AssertError::panic::he58e64f7a218bc0d
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/assert_cmd-2.0.14/src/assert.rs:1033:9
[INFO] [stdout]   22:     0x5630ed956327 - core::ops::function::FnOnce::call_once::h5f40864c0ec6e66d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   23:     0x5630ed957503 - core::result::Result<T,E>::unwrap_or_else::hcd48fac9fdd895b8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/result.rs:1525:23
[INFO] [stdout]   24:     0x5630ed90319a - assert_cmd::assert::Assert::code::h848919ecb1953372
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/assert_cmd-2.0.14/src/assert.rs:266:29
[INFO] [stdout]   25:     0x5630ed9075c9 - integration_tests::run_single_test_success_with_output::h0b41334bdf1d50e0
[INFO] [stdout]                                at /opt/rustwide/workdir/tests/integration_tests.rs:132:10
[INFO] [stdout]   26:     0x5630ed9073e7 - integration_tests::run_single_test_success_with_output::{{closure}}::hc0cbfc4fd5ae535a
[INFO] [stdout]                                at /opt/rustwide/workdir/tests/integration_tests.rs:126:41
[INFO] [stdout]   27:     0x5630ed904386 - core::ops::function::FnOnce::call_once::h38428cedd6bc9364
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   28:     0x5630ed94647b - core::ops::function::FnOnce::call_once::h1f9474f1347fff52
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   29:     0x5630ed94647b - test::__rust_begin_short_backtrace::ha52ab26e77157f03
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:648:18
[INFO] [stdout]   30:     0x5630ed9455b5 - test::run_test_in_process::{{closure}}::h229c1a11a50b261f
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:671:74
[INFO] [stdout]   31:     0x5630ed9455b5 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h78821afbf97b39a9
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   32:     0x5630ed9455b5 - std::panicking::catch_unwind::do_call::h53abf3ed5bd32ba3
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   33:     0x5630ed9455b5 - std::panicking::catch_unwind::h6deb5fe1e91873c9
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   34:     0x5630ed9455b5 - std::panic::catch_unwind::hea0829b6b565654b
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   35:     0x5630ed9455b5 - test::run_test_in_process::hdc44dfecea3db21b
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:671:27
[INFO] [stdout]   36:     0x5630ed9455b5 - test::run_test::{{closure}}::h0364ba59bf23f652
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:592:43
[INFO] [stdout]   37:     0x5630ed9091b4 - test::run_test::{{closure}}::h32730b304eec05da
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:622:41
[INFO] [stdout]   38:     0x5630ed9091b4 - std::sys::backtrace::__rust_begin_short_backtrace::h177cb952fc54ad2c
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]   39:     0x5630ed90cb8a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h119d903520007597
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   40:     0x5630ed90cb8a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hab88401d606702a6
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   41:     0x5630ed90cb8a - std::panicking::catch_unwind::do_call::h163fe12cca9901c2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   42:     0x5630ed90cb8a - std::panicking::catch_unwind::he81557d0e17cc1bc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   43:     0x5630ed90cb8a - std::panic::catch_unwind::hc2b8e79c20593955
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   44:     0x5630ed90cb8a - std::thread::Builder::spawn_unchecked_::{{closure}}::hfa6b4978e07815cc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   45:     0x5630ed90cb8a - core::ops::function::FnOnce::call_once{{vtable.shim}}::hddcd7484a13fd793
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   46:     0x5630ed9d976f - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h5924238c754de3b8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1971:9
[INFO] [stdout]   47:     0x5630ed9d976f - std::sys::pal::unix::thread::Thread::new::thread_start::hb6e99e73da4d28f8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/pal/unix/thread.rs:107:17
[INFO] [stdout]   48:     0x7294cedf3aa4 - <unknown>
[INFO] [stdout]   49:     0x7294cee80a34 - clone
[INFO] [stdout]   50:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- run_single_compile_success stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'run_single_compile_success' panicked at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5:
[INFO] [stdout] Unexpected failure.
[INFO] [stdout] code=1
[INFO] [stdout] stderr=``````
[INFO] [stdout] Error: Failed to write the state file .rustlings-state.txt
[INFO] [stdout] 
[INFO] [stdout] Caused by:
[INFO] [stdout]     Read-only file system (os error 30)
[INFO] [stdout] 
[INFO] [stdout] Stack backtrace:
[INFO] [stdout]    0: <E as anyhow::context::ext::StdError>::ext_context
[INFO] [stdout]              at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/anyhow-1.0.86/src/backtrace.rs:27:14
[INFO] [stdout]    1: anyhow::context::<impl anyhow::Context<T,E> for core::result::Result<T,E>>::with_context
[INFO] [stdout]              at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/anyhow-1.0.86/src/context.rs:65:37
[INFO] [stdout]    2: rustlings::app_state::AppState::write
[INFO] [stdout]              at /opt/rustwide/workdir/src/app_state.rs:218:14
[INFO] [stdout]    3: rustlings::app_state::AppState::set_current_exercise_by_name
[INFO] [stdout]              at /opt/rustwide/workdir/src/app_state.rs:246:14
[INFO] [stdout]    4: rustlings::main
[INFO] [stdout]              at /opt/rustwide/workdir/src/main.rs:182:27
[INFO] [stdout]    5: core::ops::function::FnOnce::call_once
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]    6: std::sys::backtrace::__rust_begin_short_backtrace
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]    7: std::rt::lang_start::{{closure}}
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:206:18
[INFO] [stdout]    8: core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:290:21
[INFO] [stdout]    9: std::panicking::catch_unwind::do_call
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   10: std::panicking::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   11: std::panic::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   12: std::rt::lang_start_internal::{{closure}}
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:175:24
[INFO] [stdout]   13: std::panicking::catch_unwind::do_call
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   14: std::panicking::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   15: std::panic::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   16: std::rt::lang_start_internal
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:171:5
[INFO] [stdout]   17: std::rt::lang_start
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:205:5
[INFO] [stdout]   18: main
[INFO] [stdout]   19: <unknown>
[INFO] [stdout]   20: __libc_start_main
[INFO] [stdout]   21: _start
[INFO] [stdout] ```
[INFO] [stdout] ```
[INFO] [stdout] command=`cd "tests/fixture/success/" && "/opt/rustwide/target/debug/rustlings" "run" "compSuccess"`
[INFO] [stdout] code=1
[INFO] [stdout] stdout=""
[INFO] [stdout] stderr=```
[INFO] [stdout] Error: Failed to write the state file .rustlings-state.txt
[INFO] [stdout] 
[INFO] [stdout] Caused by:
[INFO] [stdout]     Read-only file system (os error 30)
[INFO] [stdout] 
[INFO] [stdout] Stack backtrace:
[INFO] [stdout]    0: <E as anyhow::context::ext::StdError>::ext_context
[INFO] [stdout]              at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/anyhow-1.0.86/src/backtrace.rs:27:14
[INFO] [stdout]    1: anyhow::context::<impl anyhow::Context<T,E> for core::result::Result<T,E>>::with_context
[INFO] [stdout]              at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/anyhow-1.0.86/src/context.rs:65:37
[INFO] [stdout]    2: rustlings::app_state::AppState::write
[INFO] [stdout]              at /opt/rustwide/workdir/src/app_state.rs:218:14
[INFO] [stdout]    3: rustlings::app_state::AppState::set_current_exercise_by_name
[INFO] [stdout]              at /opt/rustwide/workdir/src/app_state.rs:246:14
[INFO] [stdout]    4: rustlings::main
[INFO] [stdout]              at /opt/rustwide/workdir/src/main.rs:182:27
[INFO] [stdout]    5: core::ops::function::FnOnce::call_once
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]    6: std::sys::backtrace::__rust_begin_short_backtrace
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]    7: std::rt::lang_start::{{closure}}
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:206:18
[INFO] [stdout]    8: core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:290:21
[INFO] [stdout]    9: std::panicking::catch_unwind::do_call
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   10: std::panicking::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   11: std::panic::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   12: std::rt::lang_start_internal::{{closure}}
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:175:24
[INFO] [stdout]   13: std::panicking::catch_unwind::do_call
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   14: std::panicking::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   15: std::panic::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   16: std::rt::lang_start_internal
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:171:5
[INFO] [stdout]   17: std::rt::lang_start
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:205:5
[INFO] [stdout]   18: main
[INFO] [stdout]   19: <unknown>
[INFO] [stdout]   20: __libc_start_main
[INFO] [stdout]   21: _start
[INFO] [stdout] ```
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5630ed9d4822 - std::backtrace_rs::backtrace::libunwind::trace::h2d45396358f41939
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x5630ed9d4822 - std::backtrace_rs::backtrace::trace_unsynchronized::hffcefc0b67f1d6e2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x5630ed9d4822 - std::sys::backtrace::_print_fmt::hd72f71d23b436b92
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x5630ed9d4822 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hdcfcb6d4c8489523
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x5630ed9fbe13 - core::fmt::rt::Argument::fmt::h2c56b3114963061a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x5630ed9fbe13 - core::fmt::write::h8a494366950f23bb
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/mod.rs:1468:25
[INFO] [stdout]    6:     0x5630ed9d1403 - std::io::default_write_fmt::h7b8824096454f323
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x5630ed9d1403 - std::io::Write::write_fmt::h4e71294925c334d0
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:1954:13
[INFO] [stdout]    8:     0x5630ed9d4672 - std::sys::backtrace::BacktraceLock::print::hb2a626a81e06b2dc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x5630ed9d5e19 - std::panicking::default_hook::{{closure}}::h4f78485264f12d10
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:300:27
[INFO] [stdout]   10:     0x5630ed9d5c4e - std::panicking::default_hook::h2c66fc99e962531d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:324:9
[INFO] [stdout]   11:     0x5630ed940c14 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hb6bd65493727d71a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   12:     0x5630ed940c14 - test::test_main_with_exit_callback::{{closure}}::h60217ec76a0ece4a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x5630ed9d67ee - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h318e4efb8c1a5689
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   14:     0x5630ed9d67ee - std::panicking::rust_panic_with_hook::h33ac55f64bbd807d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:841:13
[INFO] [stdout]   15:     0x5630ed9d65ba - std::panicking::begin_panic_handler::{{closure}}::h30e7cb89678a57fe
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:706:13
[INFO] [stdout]   16:     0x5630ed9d4d19 - std::sys::backtrace::__rust_end_short_backtrace::hed60f27456c16ced
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:174:18
[INFO] [stdout]   17:     0x5630ed9d624d - __rustc[de2ca18b4c54d5b8]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:697:5
[INFO] [stdout]   18:     0x5630ed9fa590 - core::panicking::panic_fmt::h62f63d096dd276af
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:75:14
[INFO] [stdout]   19:     0x5630ed95abc0 - core::panicking::panic_display::hb8cea7e542d01080
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:268:5
[INFO] [stdout]   20:     0x5630ed95080b - assert_cmd::assert::AssertError::panic::panic_cold_display::habfb26aeb3b0675d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic.rs:100:13
[INFO] [stdout]   21:     0x5630ed9502f7 - assert_cmd::assert::AssertError::panic::he58e64f7a218bc0d
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/assert_cmd-2.0.14/src/assert.rs:1033:9
[INFO] [stdout]   22:     0x5630ed956327 - core::ops::function::FnOnce::call_once::h5f40864c0ec6e66d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   23:     0x5630ed957503 - core::result::Result<T,E>::unwrap_or_else::hcd48fac9fdd895b8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/result.rs:1525:23
[INFO] [stdout]   24:     0x5630ed94f286 - assert_cmd::assert::Assert::success::hb6f40303894ded7a
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/assert_cmd-2.0.14/src/assert.rs:158:28
[INFO] [stdout]   25:     0x5630ed905ced - integration_tests::run_single_compile_success::h61b296f7088df992
[INFO] [stdout]                                at /opt/rustwide/workdir/tests/integration_tests.rs:20:10
[INFO] [stdout]   26:     0x5630ed905b17 - integration_tests::run_single_compile_success::{{closure}}::hc9fccc8dae9002c0
[INFO] [stdout]                                at /opt/rustwide/workdir/tests/integration_tests.rs:14:32
[INFO] [stdout]   27:     0x5630ed904446 - core::ops::function::FnOnce::call_once::h6af484d07069ca40
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   28:     0x5630ed94647b - core::ops::function::FnOnce::call_once::h1f9474f1347fff52
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   29:     0x5630ed94647b - test::__rust_begin_short_backtrace::ha52ab26e77157f03
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:648:18
[INFO] [stdout]   30:     0x5630ed9455b5 - test::run_test_in_process::{{closure}}::h229c1a11a50b261f
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:671:74
[INFO] [stdout]   31:     0x5630ed9455b5 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h78821afbf97b39a9
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   32:     0x5630ed9455b5 - std::panicking::catch_unwind::do_call::h53abf3ed5bd32ba3
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   33:     0x5630ed9455b5 - std::panicking::catch_unwind::h6deb5fe1e91873c9
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   34:     0x5630ed9455b5 - std::panic::catch_unwind::hea0829b6b565654b
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   35:     0x5630ed9455b5 - test::run_test_in_process::hdc44dfecea3db21b
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:671:27
[INFO] [stdout]   36:     0x5630ed9455b5 - test::run_test::{{closure}}::h0364ba59bf23f652
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:592:43
[INFO] [stdout]   37:     0x5630ed9091b4 - test::run_test::{{closure}}::h32730b304eec05da
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:622:41
[INFO] [stdout]   38:     0x5630ed9091b4 - std::sys::backtrace::__rust_begin_short_backtrace::h177cb952fc54ad2c
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]   39:     0x5630ed90cb8a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h119d903520007597
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   40:     0x5630ed90cb8a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hab88401d606702a6
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   41:     0x5630ed90cb8a - std::panicking::catch_unwind::do_call::h163fe12cca9901c2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   42:     0x5630ed90cb8a - std::panicking::catch_unwind::he81557d0e17cc1bc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   43:     0x5630ed90cb8a - std::panic::catch_unwind::hc2b8e79c20593955
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   44:     0x5630ed90cb8a - std::thread::Builder::spawn_unchecked_::{{closure}}::hfa6b4978e07815cc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   45:     0x5630ed90cb8a - core::ops::function::FnOnce::call_once{{vtable.shim}}::hddcd7484a13fd793
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   46:     0x5630ed9d976f - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h5924238c754de3b8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1971:9
[INFO] [stdout]   47:     0x5630ed9d976f - std::sys::pal::unix::thread::Thread::new::thread_start::hb6e99e73da4d28f8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/pal/unix/thread.rs:107:17
[INFO] [stdout]   48:     0x7294cedf3aa4 - <unknown>
[INFO] [stdout]   49:     0x7294cee80a34 - clone
[INFO] [stdout]   50:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- get_hint_for_single_test stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'get_hint_for_single_test' panicked at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5:
[INFO] [stdout] Unexpected return code, failed var == 0
[INFO] [stdout] └── var: 1
[INFO] [stdout] 
[INFO] [stdout] command=`cd "tests/fixture/failure" && "/opt/rustwide/target/debug/rustlings" "hint" "testFailure"`
[INFO] [stdout] code=1
[INFO] [stdout] stdout=""
[INFO] [stdout] stderr=```
[INFO] [stdout] Error: Failed to write the state file .rustlings-state.txt
[INFO] [stdout] 
[INFO] [stdout] Caused by:
[INFO] [stdout]     Read-only file system (os error 30)
[INFO] [stdout] 
[INFO] [stdout] Stack backtrace:
[INFO] [stdout]    0: <E as anyhow::context::ext::StdError>::ext_context
[INFO] [stdout]              at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/anyhow-1.0.86/src/backtrace.rs:27:14
[INFO] [stdout]    1: anyhow::context::<impl anyhow::Context<T,E> for core::result::Result<T,E>>::with_context
[INFO] [stdout]              at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/anyhow-1.0.86/src/context.rs:65:37
[INFO] [stdout]    2: rustlings::app_state::AppState::write
[INFO] [stdout]              at /opt/rustwide/workdir/src/app_state.rs:218:14
[INFO] [stdout]    3: rustlings::app_state::AppState::set_current_exercise_by_name
[INFO] [stdout]              at /opt/rustwide/workdir/src/app_state.rs:246:14
[INFO] [stdout]    4: rustlings::main
[INFO] [stdout]              at /opt/rustwide/workdir/src/main.rs:193:27
[INFO] [stdout]    5: core::ops::function::FnOnce::call_once
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]    6: std::sys::backtrace::__rust_begin_short_backtrace
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]    7: std::rt::lang_start::{{closure}}
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:206:18
[INFO] [stdout]    8: core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:290:21
[INFO] [stdout]    9: std::panicking::catch_unwind::do_call
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   10: std::panicking::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   11: std::panic::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   12: std::rt::lang_start_internal::{{closure}}
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:175:24
[INFO] [stdout]   13: std::panicking::catch_unwind::do_call
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   14: std::panicking::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   15: std::panic::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   16: std::rt::lang_start_internal
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:171:5
[INFO] [stdout]   17: std::rt::lang_start
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:205:5
[INFO] [stdout]   18: main
[INFO] [stdout]   19: <unknown>
[INFO] [stdout]   20: __libc_start_main
[INFO] [stdout]   21: _start
[INFO] [stdout] ```
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5630ed9d4822 - std::backtrace_rs::backtrace::libunwind::trace::h2d45396358f41939
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x5630ed9d4822 - std::backtrace_rs::backtrace::trace_unsynchronized::hffcefc0b67f1d6e2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x5630ed9d4822 - std::sys::backtrace::_print_fmt::hd72f71d23b436b92
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x5630ed9d4822 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hdcfcb6d4c8489523
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x5630ed9fbe13 - core::fmt::rt::Argument::fmt::h2c56b3114963061a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x5630ed9fbe13 - core::fmt::write::h8a494366950f23bb
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/mod.rs:1468:25
[INFO] [stdout]    6:     0x5630ed9d1403 - std::io::default_write_fmt::h7b8824096454f323
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x5630ed9d1403 - std::io::Write::write_fmt::h4e71294925c334d0
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:1954:13
[INFO] [stdout]    8:     0x5630ed9d4672 - std::sys::backtrace::BacktraceLock::print::hb2a626a81e06b2dc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x5630ed9d5e19 - std::panicking::default_hook::{{closure}}::h4f78485264f12d10
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:300:27
[INFO] [stdout]   10:     0x5630ed9d5c4e - std::panicking::default_hook::h2c66fc99e962531d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:324:9
[INFO] [stdout]   11:     0x5630ed940c14 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hb6bd65493727d71a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   12:     0x5630ed940c14 - test::test_main_with_exit_callback::{{closure}}::h60217ec76a0ece4a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x5630ed9d67ee - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h318e4efb8c1a5689
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   14:     0x5630ed9d67ee - std::panicking::rust_panic_with_hook::h33ac55f64bbd807d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:841:13
[INFO] [stdout]   15:     0x5630ed9d65ba - std::panicking::begin_panic_handler::{{closure}}::h30e7cb89678a57fe
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:706:13
[INFO] [stdout]   16:     0x5630ed9d4d19 - std::sys::backtrace::__rust_end_short_backtrace::hed60f27456c16ced
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:174:18
[INFO] [stdout]   17:     0x5630ed9d624d - __rustc[de2ca18b4c54d5b8]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:697:5
[INFO] [stdout]   18:     0x5630ed9fa590 - core::panicking::panic_fmt::h62f63d096dd276af
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:75:14
[INFO] [stdout]   19:     0x5630ed95abc0 - core::panicking::panic_display::hb8cea7e542d01080
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:268:5
[INFO] [stdout]   20:     0x5630ed95080b - assert_cmd::assert::AssertError::panic::panic_cold_display::habfb26aeb3b0675d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic.rs:100:13
[INFO] [stdout]   21:     0x5630ed9502f7 - assert_cmd::assert::AssertError::panic::he58e64f7a218bc0d
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/assert_cmd-2.0.14/src/assert.rs:1033:9
[INFO] [stdout]   22:     0x5630ed956327 - core::ops::function::FnOnce::call_once::h5f40864c0ec6e66d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   23:     0x5630ed957503 - core::result::Result<T,E>::unwrap_or_else::hcd48fac9fdd895b8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/result.rs:1525:23
[INFO] [stdout]   24:     0x5630ed90319a - assert_cmd::assert::Assert::code::h848919ecb1953372
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/assert_cmd-2.0.14/src/assert.rs:266:29
[INFO] [stdout]   25:     0x5630ed906f01 - integration_tests::get_hint_for_single_test::hfa02543f4ce61414
[INFO] [stdout]                                at /opt/rustwide/workdir/tests/integration_tests.rs:101:10
[INFO] [stdout]   26:     0x5630ed906d27 - integration_tests::get_hint_for_single_test::{{closure}}::h8a80230ea6ee7c01
[INFO] [stdout]                                at /opt/rustwide/workdir/tests/integration_tests.rs:95:30
[INFO] [stdout]   27:     0x5630ed904406 - core::ops::function::FnOnce::call_once::h4374546667606178
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   28:     0x5630ed94647b - core::ops::function::FnOnce::call_once::h1f9474f1347fff52
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   29:     0x5630ed94647b - test::__rust_begin_short_backtrace::ha52ab26e77157f03
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:648:18
[INFO] [stdout]   30:     0x5630ed9455b5 - test::run_test_in_process::{{closure}}::h229c1a11a50b261f
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:671:74
[INFO] [stdout]   31:     0x5630ed9455b5 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h78821afbf97b39a9
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   32:     0x5630ed9455b5 - std::panicking::catch_unwind::do_call::h53abf3ed5bd32ba3
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   33:     0x5630ed9455b5 - std::panicking::catch_unwind::h6deb5fe1e91873c9
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   34:     0x5630ed9455b5 - std::panic::catch_unwind::hea0829b6b565654b
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   35:     0x5630ed9455b5 - test::run_test_in_process::hdc44dfecea3db21b
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:671:27
[INFO] [stdout]   36:     0x5630ed9455b5 - test::run_test::{{closure}}::h0364ba59bf23f652
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:592:43
[INFO] [stdout]   37:     0x5630ed9091b4 - test::run_test::{{closure}}::h32730b304eec05da
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:622:41
[INFO] [stdout]   38:     0x5630ed9091b4 - std::sys::backtrace::__rust_begin_short_backtrace::h177cb952fc54ad2c
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]   39:     0x5630ed90cb8a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h119d903520007597
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   40:     0x5630ed90cb8a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hab88401d606702a6
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   41:     0x5630ed90cb8a - std::panicking::catch_unwind::do_call::h163fe12cca9901c2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   42:     0x5630ed90cb8a - std::panicking::catch_unwind::he81557d0e17cc1bc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   43:     0x5630ed90cb8a - std::panic::catch_unwind::hc2b8e79c20593955
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   44:     0x5630ed90cb8a - std::thread::Builder::spawn_unchecked_::{{closure}}::hfa6b4978e07815cc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   45:     0x5630ed90cb8a - core::ops::function::FnOnce::call_once{{vtable.shim}}::hddcd7484a13fd793
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   46:     0x5630ed9d976f - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h5924238c754de3b8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1971:9
[INFO] [stdout]   47:     0x5630ed9d976f - std::sys::pal::unix::thread::Thread::new::thread_start::hb6e99e73da4d28f8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/pal/unix/thread.rs:107:17
[INFO] [stdout]   48:     0x7294cedf3aa4 - <unknown>
[INFO] [stdout]   49:     0x7294cee80a34 - clone
[INFO] [stdout]   50:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- run_test_exercise_does_not_prompt stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'run_test_exercise_does_not_prompt' panicked at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5:
[INFO] [stdout] Unexpected return code, failed var == 0
[INFO] [stdout] └── var: 1
[INFO] [stdout] 
[INFO] [stdout] command=`cd "tests/fixture/state" && "/opt/rustwide/target/debug/rustlings" "run" "pending_test_exercise"`
[INFO] [stdout] code=1
[INFO] [stdout] stdout=""
[INFO] [stdout] stderr=```
[INFO] [stdout] Error: Failed to write the state file .rustlings-state.txt
[INFO] [stdout] 
[INFO] [stdout] Caused by:
[INFO] [stdout]     Read-only file system (os error 30)
[INFO] [stdout] 
[INFO] [stdout] Stack backtrace:
[INFO] [stdout]    0: <E as anyhow::context::ext::StdError>::ext_context
[INFO] [stdout]              at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/anyhow-1.0.86/src/backtrace.rs:27:14
[INFO] [stdout]    1: anyhow::context::<impl anyhow::Context<T,E> for core::result::Result<T,E>>::with_context
[INFO] [stdout]              at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/anyhow-1.0.86/src/context.rs:65:37
[INFO] [stdout]    2: rustlings::app_state::AppState::write
[INFO] [stdout]              at /opt/rustwide/workdir/src/app_state.rs:218:14
[INFO] [stdout]    3: rustlings::app_state::AppState::set_current_exercise_by_name
[INFO] [stdout]              at /opt/rustwide/workdir/src/app_state.rs:246:14
[INFO] [stdout]    4: rustlings::main
[INFO] [stdout]              at /opt/rustwide/workdir/src/main.rs:182:27
[INFO] [stdout]    5: core::ops::function::FnOnce::call_once
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]    6: std::sys::backtrace::__rust_begin_short_backtrace
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]    7: std::rt::lang_start::{{closure}}
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:206:18
[INFO] [stdout]    8: core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:290:21
[INFO] [stdout]    9: std::panicking::catch_unwind::do_call
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   10: std::panicking::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   11: std::panic::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   12: std::rt::lang_start_internal::{{closure}}
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:175:24
[INFO] [stdout]   13: std::panicking::catch_unwind::do_call
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   14: std::panicking::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   15: std::panic::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   16: std::rt::lang_start_internal
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:171:5
[INFO] [stdout]   17: std::rt::lang_start
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:205:5
[INFO] [stdout]   18: main
[INFO] [stdout]   19: <unknown>
[INFO] [stdout]   20: __libc_start_main
[INFO] [stdout]   21: _start
[INFO] [stdout] ```
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5630ed9d4822 - std::backtrace_rs::backtrace::libunwind::trace::h2d45396358f41939
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x5630ed9d4822 - std::backtrace_rs::backtrace::trace_unsynchronized::hffcefc0b67f1d6e2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x5630ed9d4822 - std::sys::backtrace::_print_fmt::hd72f71d23b436b92
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x5630ed9d4822 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hdcfcb6d4c8489523
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x5630ed9fbe13 - core::fmt::rt::Argument::fmt::h2c56b3114963061a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x5630ed9fbe13 - core::fmt::write::h8a494366950f23bb
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/mod.rs:1468:25
[INFO] [stdout]    6:     0x5630ed9d1403 - std::io::default_write_fmt::h7b8824096454f323
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x5630ed9d1403 - std::io::Write::write_fmt::h4e71294925c334d0
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:1954:13
[INFO] [stdout]    8:     0x5630ed9d4672 - std::sys::backtrace::BacktraceLock::print::hb2a626a81e06b2dc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x5630ed9d5e19 - std::panicking::default_hook::{{closure}}::h4f78485264f12d10
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:300:27
[INFO] [stdout]   10:     0x5630ed9d5c4e - std::panicking::default_hook::h2c66fc99e962531d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:324:9
[INFO] [stdout]   11:     0x5630ed940c14 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hb6bd65493727d71a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   12:     0x5630ed940c14 - test::test_main_with_exit_callback::{{closure}}::h60217ec76a0ece4a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x5630ed9d67ee - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h318e4efb8c1a5689
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   14:     0x5630ed9d67ee - std::panicking::rust_panic_with_hook::h33ac55f64bbd807d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:841:13
[INFO] [stdout]   15:     0x5630ed9d65ba - std::panicking::begin_panic_handler::{{closure}}::h30e7cb89678a57fe
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:706:13
[INFO] [stdout]   16:     0x5630ed9d4d19 - std::sys::backtrace::__rust_end_short_backtrace::hed60f27456c16ced
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:174:18
[INFO] [stdout]   17:     0x5630ed9d624d - __rustc[de2ca18b4c54d5b8]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:697:5
[INFO] [stdout]   18:     0x5630ed9fa590 - core::panicking::panic_fmt::h62f63d096dd276af
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:75:14
[INFO] [stdout]   19:     0x5630ed95abc0 - core::panicking::panic_display::hb8cea7e542d01080
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:268:5
[INFO] [stdout]   20:     0x5630ed95080b - assert_cmd::assert::AssertError::panic::panic_cold_display::habfb26aeb3b0675d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic.rs:100:13
[INFO] [stdout]   21:     0x5630ed9502f7 - assert_cmd::assert::AssertError::panic::he58e64f7a218bc0d
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/assert_cmd-2.0.14/src/assert.rs:1033:9
[INFO] [stdout]   22:     0x5630ed956327 - core::ops::function::FnOnce::call_once::h5f40864c0ec6e66d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   23:     0x5630ed957503 - core::result::Result<T,E>::unwrap_or_else::hcd48fac9fdd895b8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/result.rs:1525:23
[INFO] [stdout]   24:     0x5630ed90319a - assert_cmd::assert::Assert::code::h848919ecb1953372
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/assert_cmd-2.0.14/src/assert.rs:266:29
[INFO] [stdout]   25:     0x5630ed90738b - integration_tests::run_test_exercise_does_not_prompt::h1e09d11721d2cb2a
[INFO] [stdout]                                at /opt/rustwide/workdir/tests/integration_tests.rs:122:10
[INFO] [stdout]   26:     0x5630ed9071b7 - integration_tests::run_test_exercise_does_not_prompt::{{closure}}::h1cf511a737fd02a5
[INFO] [stdout]                                at /opt/rustwide/workdir/tests/integration_tests.rs:116:39
[INFO] [stdout]   27:     0x5630ed904656 - core::ops::function::FnOnce::call_once::hd03fa85337d408ff
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   28:     0x5630ed94647b - core::ops::function::FnOnce::call_once::h1f9474f1347fff52
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   29:     0x5630ed94647b - test::__rust_begin_short_backtrace::ha52ab26e77157f03
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:648:18
[INFO] [stdout]   30:     0x5630ed9455b5 - test::run_test_in_process::{{closure}}::h229c1a11a50b261f
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:671:74
[INFO] [stdout]   31:     0x5630ed9455b5 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h78821afbf97b39a9
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   32:     0x5630ed9455b5 - std::panicking::catch_unwind::do_call::h53abf3ed5bd32ba3
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   33:     0x5630ed9455b5 - std::panicking::catch_unwind::h6deb5fe1e91873c9
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   34:     0x5630ed9455b5 - std::panic::catch_unwind::hea0829b6b565654b
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   35:     0x5630ed9455b5 - test::run_test_in_process::hdc44dfecea3db21b
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:671:27
[INFO] [stdout]   36:     0x5630ed9455b5 - test::run_test::{{closure}}::h0364ba59bf23f652
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:592:43
[INFO] [stdout]   37:     0x5630ed9091b4 - test::run_test::{{closure}}::h32730b304eec05da
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:622:41
[INFO] [stdout]   38:     0x5630ed9091b4 - std::sys::backtrace::__rust_begin_short_backtrace::h177cb952fc54ad2c
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]   39:     0x5630ed90cb8a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h119d903520007597
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   40:     0x5630ed90cb8a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hab88401d606702a6
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   41:     0x5630ed90cb8a - std::panicking::catch_unwind::do_call::h163fe12cca9901c2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   42:     0x5630ed90cb8a - std::panicking::catch_unwind::he81557d0e17cc1bc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   43:     0x5630ed90cb8a - std::panic::catch_unwind::hc2b8e79c20593955
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   44:     0x5630ed90cb8a - std::thread::Builder::spawn_unchecked_::{{closure}}::hfa6b4978e07815cc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   45:     0x5630ed90cb8a - core::ops::function::FnOnce::call_once{{vtable.shim}}::hddcd7484a13fd793
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   46:     0x5630ed9d976f - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h5924238c754de3b8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1971:9
[INFO] [stdout]   47:     0x5630ed9d976f - std::sys::pal::unix::thread::Thread::new::thread_start::hb6e99e73da4d28f8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/pal/unix/thread.rs:107:17
[INFO] [stdout]   48:     0x7294cedf3aa4 - <unknown>
[INFO] [stdout]   49:     0x7294cee80a34 - clone
[INFO] [stdout]   50:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- run_single_test_success stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'run_single_test_success' panicked at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5:
[INFO] [stdout] Unexpected failure.
[INFO] [stdout] code=1
[INFO] [stdout] stderr=``````
[INFO] [stdout] Error: Failed to write the state file .rustlings-state.txt
[INFO] [stdout] 
[INFO] [stdout] Caused by:
[INFO] [stdout]     Read-only file system (os error 30)
[INFO] [stdout] 
[INFO] [stdout] Stack backtrace:
[INFO] [stdout]    0: <E as anyhow::context::ext::StdError>::ext_context
[INFO] [stdout]              at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/anyhow-1.0.86/src/backtrace.rs:27:14
[INFO] [stdout]    1: anyhow::context::<impl anyhow::Context<T,E> for core::result::Result<T,E>>::with_context
[INFO] [stdout]              at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/anyhow-1.0.86/src/context.rs:65:37
[INFO] [stdout]    2: rustlings::app_state::AppState::write
[INFO] [stdout]              at /opt/rustwide/workdir/src/app_state.rs:218:14
[INFO] [stdout]    3: rustlings::app_state::AppState::set_current_exercise_by_name
[INFO] [stdout]              at /opt/rustwide/workdir/src/app_state.rs:246:14
[INFO] [stdout]    4: rustlings::main
[INFO] [stdout]              at /opt/rustwide/workdir/src/main.rs:182:27
[INFO] [stdout]    5: core::ops::function::FnOnce::call_once
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]    6: std::sys::backtrace::__rust_begin_short_backtrace
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]    7: std::rt::lang_start::{{closure}}
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:206:18
[INFO] [stdout]    8: core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:290:21
[INFO] [stdout]    9: std::panicking::catch_unwind::do_call
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   10: std::panicking::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   11: std::panic::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   12: std::rt::lang_start_internal::{{closure}}
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:175:24
[INFO] [stdout]   13: std::panicking::catch_unwind::do_call
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   14: std::panicking::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   15: std::panic::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   16: std::rt::lang_start_internal
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:171:5
[INFO] [stdout]   17: std::rt::lang_start
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:205:5
[INFO] [stdout]   18: main
[INFO] [stdout]   19: <unknown>
[INFO] [stdout]   20: __libc_start_main
[INFO] [stdout]   21: _start
[INFO] [stdout] ```
[INFO] [stdout] ```
[INFO] [stdout] command=`cd "tests/fixture/success/" && "/opt/rustwide/target/debug/rustlings" "run" "testSuccess"`
[INFO] [stdout] code=1
[INFO] [stdout] stdout=""
[INFO] [stdout] stderr=```
[INFO] [stdout] Error: Failed to write the state file .rustlings-state.txt
[INFO] [stdout] 
[INFO] [stdout] Caused by:
[INFO] [stdout]     Read-only file system (os error 30)
[INFO] [stdout] 
[INFO] [stdout] Stack backtrace:
[INFO] [stdout]    0: <E as anyhow::context::ext::StdError>::ext_context
[INFO] [stdout]              at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/anyhow-1.0.86/src/backtrace.rs:27:14
[INFO] [stdout]    1: anyhow::context::<impl anyhow::Context<T,E> for core::result::Result<T,E>>::with_context
[INFO] [stdout]              at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/anyhow-1.0.86/src/context.rs:65:37
[INFO] [stdout]    2: rustlings::app_state::AppState::write
[INFO] [stdout]              at /opt/rustwide/workdir/src/app_state.rs:218:14
[INFO] [stdout]    3: rustlings::app_state::AppState::set_current_exercise_by_name
[INFO] [stdout]              at /opt/rustwide/workdir/src/app_state.rs:246:14
[INFO] [stdout]    4: rustlings::main
[INFO] [stdout]              at /opt/rustwide/workdir/src/main.rs:182:27
[INFO] [stdout]    5: core::ops::function::FnOnce::call_once
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]    6: std::sys::backtrace::__rust_begin_short_backtrace
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]    7: std::rt::lang_start::{{closure}}
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:206:18
[INFO] [stdout]    8: core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:290:21
[INFO] [stdout]    9: std::panicking::catch_unwind::do_call
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   10: std::panicking::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   11: std::panic::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   12: std::rt::lang_start_internal::{{closure}}
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:175:24
[INFO] [stdout]   13: std::panicking::catch_unwind::do_call
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   14: std::panicking::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   15: std::panic::catch_unwind
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   16: std::rt::lang_start_internal
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:171:5
[INFO] [stdout]   17: std::rt::lang_start
[INFO] [stdout]              at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/rt.rs:205:5
[INFO] [stdout]   18: main
[INFO] [stdout]   19: <unknown>
[INFO] [stdout]   20: __libc_start_main
[INFO] [stdout]   21: _start
[INFO] [stdout] ```
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5630ed9d4822 - std::backtrace_rs::backtrace::libunwind::trace::h2d45396358f41939
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x5630ed9d4822 - std::backtrace_rs::backtrace::trace_unsynchronized::hffcefc0b67f1d6e2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x5630ed9d4822 - std::sys::backtrace::_print_fmt::hd72f71d23b436b92
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x5630ed9d4822 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hdcfcb6d4c8489523
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x5630ed9fbe13 - core::fmt::rt::Argument::fmt::h2c56b3114963061a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x5630ed9fbe13 - core::fmt::write::h8a494366950f23bb
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/mod.rs:1468:25
[INFO] [stdout]    6:     0x5630ed9d1403 - std::io::default_write_fmt::h7b8824096454f323
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x5630ed9d1403 - std::io::Write::write_fmt::h4e71294925c334d0
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:1954:13
[INFO] [stdout]    8:     0x5630ed9d4672 - std::sys::backtrace::BacktraceLock::print::hb2a626a81e06b2dc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x5630ed9d5e19 - std::panicking::default_hook::{{closure}}::h4f78485264f12d10
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:300:27
[INFO] [stdout]   10:     0x5630ed9d5c4e - std::panicking::default_hook::h2c66fc99e962531d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:324:9
[INFO] [stdout]   11:     0x5630ed940c14 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hb6bd65493727d71a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   12:     0x5630ed940c14 - test::test_main_with_exit_callback::{{closure}}::h60217ec76a0ece4a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x5630ed9d67ee - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h318e4efb8c1a5689
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   14:     0x5630ed9d67ee - std::panicking::rust_panic_with_hook::h33ac55f64bbd807d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:841:13
[INFO] [stdout]   15:     0x5630ed9d65ba - std::panicking::begin_panic_handler::{{closure}}::h30e7cb89678a57fe
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:706:13
[INFO] [stdout]   16:     0x5630ed9d4d19 - std::sys::backtrace::__rust_end_short_backtrace::hed60f27456c16ced
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:174:18
[INFO] [stdout]   17:     0x5630ed9d624d - __rustc[de2ca18b4c54d5b8]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:697:5
[INFO] [stdout]   18:     0x5630ed9fa590 - core::panicking::panic_fmt::h62f63d096dd276af
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:75:14
[INFO] [stdout]   19:     0x5630ed95abc0 - core::panicking::panic_display::hb8cea7e542d01080
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:268:5
[INFO] [stdout]   20:     0x5630ed95080b - assert_cmd::assert::AssertError::panic::panic_cold_display::habfb26aeb3b0675d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic.rs:100:13
[INFO] [stdout]   21:     0x5630ed9502f7 - assert_cmd::assert::AssertError::panic::he58e64f7a218bc0d
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/assert_cmd-2.0.14/src/assert.rs:1033:9
[INFO] [stdout]   22:     0x5630ed956327 - core::ops::function::FnOnce::call_once::h5f40864c0ec6e66d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   23:     0x5630ed957503 - core::result::Result<T,E>::unwrap_or_else::hcd48fac9fdd895b8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/result.rs:1525:23
[INFO] [stdout]   24:     0x5630ed94f286 - assert_cmd::assert::Assert::success::hb6f40303894ded7a
[INFO] [stdout]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/assert_cmd-2.0.14/src/assert.rs:158:28
[INFO] [stdout]   25:     0x5630ed90616d - integration_tests::run_single_test_success::h44adb38f05980ba7
[INFO] [stdout]                                at /opt/rustwide/workdir/tests/integration_tests.rs:40:10
[INFO] [stdout]   26:     0x5630ed905f97 - integration_tests::run_single_test_success::{{closure}}::h68a7f75981058f45
[INFO] [stdout]                                at /opt/rustwide/workdir/tests/integration_tests.rs:34:29
[INFO] [stdout]   27:     0x5630ed904586 - core::ops::function::FnOnce::call_once::h94e55a50addb4574
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   28:     0x5630ed94647b - core::ops::function::FnOnce::call_once::h1f9474f1347fff52
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   29:     0x5630ed94647b - test::__rust_begin_short_backtrace::ha52ab26e77157f03
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:648:18
[INFO] [stdout]   30:     0x5630ed9455b5 - test::run_test_in_process::{{closure}}::h229c1a11a50b261f
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:671:74
[INFO] [stdout]   31:     0x5630ed9455b5 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h78821afbf97b39a9
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   32:     0x5630ed9455b5 - std::panicking::catch_unwind::do_call::h53abf3ed5bd32ba3
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   33:     0x5630ed9455b5 - std::panicking::catch_unwind::h6deb5fe1e91873c9
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   34:     0x5630ed9455b5 - std::panic::catch_unwind::hea0829b6b565654b
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   35:     0x5630ed9455b5 - test::run_test_in_process::hdc44dfecea3db21b
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:671:27
[INFO] [stdout]   36:     0x5630ed9455b5 - test::run_test::{{closure}}::h0364ba59bf23f652
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:592:43
[INFO] [stdout]   37:     0x5630ed9091b4 - test::run_test::{{closure}}::h32730b304eec05da
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:622:41
[INFO] [stdout]   38:     0x5630ed9091b4 - std::sys::backtrace::__rust_begin_short_backtrace::h177cb952fc54ad2c
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]   39:     0x5630ed90cb8a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h119d903520007597
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   40:     0x5630ed90cb8a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hab88401d606702a6
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   41:     0x5630ed90cb8a - std::panicking::catch_unwind::do_call::h163fe12cca9901c2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   42:     0x5630ed90cb8a - std::panicking::catch_unwind::he81557d0e17cc1bc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   43:     0x5630ed90cb8a - std::panic::catch_unwind::hc2b8e79c20593955
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   44:     0x5630ed90cb8a - std::thread::Builder::spawn_unchecked_::{{closure}}::hfa6b4978e07815cc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   45:     0x5630ed90cb8a - core::ops::function::FnOnce::call_once{{vtable.shim}}::hddcd7484a13fd793
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   46:     0x5630ed9d976f - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h5924238c754de3b8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1971:9
[INFO] [stdout]   47:     0x5630ed9d976f - std::sys::pal::unix::thread::Thread::new::thread_start::hb6e99e73da4d28f8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/pal/unix/thread.rs:107:17
[INFO] [stdout]   48:     0x7294cedf3aa4 - <unknown>
[INFO] [stdout]   49:     0x7294cee80a34 - clone
[INFO] [stdout]   50:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     get_hint_for_single_test
[INFO] [stdout]     reset_single_exercise
[INFO] [stdout]     run_compile_exercise_does_not_prompt
[INFO] [stdout]     run_single_compile_success
[INFO] [stdout]     run_single_test_success
[INFO] [stdout]     run_single_test_success_with_output
[INFO] [stdout]     run_test_exercise_does_not_prompt
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 6 passed; 7 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.49s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--test integration_tests`
[INFO] running `Command { std: "docker" "inspect" "25e218cab960ce579383fd7cc23c78684f17ddbc52b44bdfa61422ab88d40c32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25e218cab960ce579383fd7cc23c78684f17ddbc52b44bdfa61422ab88d40c32", kill_on_drop: false }`
[INFO] [stdout] 25e218cab960ce579383fd7cc23c78684f17ddbc52b44bdfa61422ab88d40c32
