[INFO] cloning repository https://github.com/wyatt-herkamp/tux-graph
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wyatt-herkamp/tux-graph" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwyatt-herkamp%2Ftux-graph", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwyatt-herkamp%2Ftux-graph'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e3441656d715b358fe5a046de8184fe79b41a316
[INFO] testing wyatt-herkamp/tux-graph against beta-2024-12-08 for beta-1.84.0-4-retry
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwyatt-herkamp%2Ftux-graph" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wyatt-herkamp/tux-graph on toolchain beta-2024-12-08
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-12-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wyatt-herkamp/tux-graph
[INFO] finished tweaking git repo https://github.com/wyatt-herkamp/tux-graph
[INFO] tweaked toml for git repo https://github.com/wyatt-herkamp/tux-graph written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/wyatt-herkamp/tux-graph 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" "+beta-2024-12-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: /workspace/builds/worker-2-tc2/source/Cargo.toml: unused manifest key: workspace.workspace
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-12-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 925239008bf3e0d26b158431bfdd35eef7ef2dd1e6ac182510bb6281c71cfa60
[INFO] running `Command { std: "docker" "start" "-a" "925239008bf3e0d26b158431bfdd35eef7ef2dd1e6ac182510bb6281c71cfa60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "925239008bf3e0d26b158431bfdd35eef7ef2dd1e6ac182510bb6281c71cfa60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "925239008bf3e0d26b158431bfdd35eef7ef2dd1e6ac182510bb6281c71cfa60", kill_on_drop: false }`
[INFO] [stdout] 925239008bf3e0d26b158431bfdd35eef7ef2dd1e6ac182510bb6281c71cfa60
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-12-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bb6b7df37b9b2ed423bee83ef3b6b34ef0e32276febce3d629839194aec56e71
[INFO] running `Command { std: "docker" "start" "-a" "bb6b7df37b9b2ed423bee83ef3b6b34ef0e32276febce3d629839194aec56e71", kill_on_drop: false }`
[INFO] [stderr] warning: /opt/rustwide/workdir/Cargo.toml: unused manifest key: workspace.workspace
[INFO] [stderr]    Compiling proc-macro2 v1.0.89
[INFO] [stderr]    Compiling unicode-ident v1.0.13
[INFO] [stderr]    Compiling libc v0.2.161
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling once_cell v1.20.2
[INFO] [stderr]    Compiling version_check v0.9.5
[INFO] [stderr]    Compiling serde v1.0.214
[INFO] [stderr]    Compiling thiserror v1.0.66
[INFO] [stderr]    Compiling pin-project-lite v0.2.15
[INFO] [stderr]    Compiling either v1.13.0
[INFO] [stderr]    Compiling ahash v0.8.11
[INFO] [stderr]    Compiling itertools v0.13.0
[INFO] [stderr]    Compiling tracing-core v0.1.32
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.86
[INFO] [stderr]    Compiling getrandom v0.2.15
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling serde_derive v1.0.214
[INFO] [stderr]    Compiling thiserror-impl v1.0.66
[INFO] [stderr]    Compiling tux-graph-macros v0.1.0 (/opt/rustwide/workdir/tux-graph-macros)
[INFO] [stderr]    Compiling tracing v0.1.40
[INFO] [stderr]    Compiling zerocopy v0.7.35
[INFO] [stderr]    Compiling ppv-lite86 v0.2.20
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling tux-graph v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type alias `EdgeRefAndID` is never used
[INFO] [stdout]  --> src/adjacency_list/graph/utils.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub type EdgeRefAndID<'a> = (EdgeID, &'a Edge);
[INFO] [stdout]   |          ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 19.30s
[INFO] running `Command { std: "docker" "inspect" "bb6b7df37b9b2ed423bee83ef3b6b34ef0e32276febce3d629839194aec56e71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb6b7df37b9b2ed423bee83ef3b6b34ef0e32276febce3d629839194aec56e71", kill_on_drop: false }`
[INFO] [stdout] bb6b7df37b9b2ed423bee83ef3b6b34ef0e32276febce3d629839194aec56e71
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-12-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5698a8909ed8ccc5190dd755bc51de61fc36687d46881141ab43c3a47c03929d
[INFO] running `Command { std: "docker" "start" "-a" "5698a8909ed8ccc5190dd755bc51de61fc36687d46881141ab43c3a47c03929d", kill_on_drop: false }`
[INFO] [stderr] warning: /opt/rustwide/workdir/Cargo.toml: unused manifest key: workspace.workspace
[INFO] [stderr]    Compiling serde_json v1.0.132
[INFO] [stderr]    Compiling anyhow v1.0.92
[INFO] [stderr]    Compiling yansi v1.0.1
[INFO] [stderr]    Compiling diff v0.1.13
[INFO] [stderr]    Compiling itoa v1.0.11
[INFO] [stderr]    Compiling memchr v2.7.4
[INFO] [stderr]    Compiling ryu v1.0.18
[INFO] [stdout] warning: type alias `EdgeRefAndID` is never used
[INFO] [stdout]  --> src/adjacency_list/graph/utils.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub type EdgeRefAndID<'a> = (EdgeID, &'a Edge);
[INFO] [stdout]   |          ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling pretty_assertions v1.4.1
[INFO] [stderr]    Compiling tux-graph v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type alias `EdgeRefAndID` is never used
[INFO] [stdout]  --> src/adjacency_list/graph/utils.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub type EdgeRefAndID<'a> = (EdgeID, &'a Edge);
[INFO] [stdout]   |          ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 4.81s
[INFO] running `Command { std: "docker" "inspect" "5698a8909ed8ccc5190dd755bc51de61fc36687d46881141ab43c3a47c03929d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5698a8909ed8ccc5190dd755bc51de61fc36687d46881141ab43c3a47c03929d", kill_on_drop: false }`
[INFO] [stdout] 5698a8909ed8ccc5190dd755bc51de61fc36687d46881141ab43c3a47c03929d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-12-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 07849efb709ff34dba3585ff00d558295e6a2dbdfa47d947d2e30669436a4bb1
[INFO] running `Command { std: "docker" "start" "-a" "07849efb709ff34dba3585ff00d558295e6a2dbdfa47d947d2e30669436a4bb1", kill_on_drop: false }`
[INFO] [stderr] warning: /opt/rustwide/workdir/Cargo.toml: unused manifest key: workspace.workspace
[INFO] [stderr] warning: type alias `EdgeRefAndID` is never used
[INFO] [stderr]  --> src/adjacency_list/graph/utils.rs:5:10
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub type EdgeRefAndID<'a> = (EdgeID, &'a Edge);
[INFO] [stderr]   |          ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `tux-graph` (lib) generated 1 warning
[INFO] [stderr] warning: `tux-graph` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/tux_graph-08a59be9726dea66)
[INFO] [stdout] 
[INFO] [stdout] running 13 tests
[INFO] [stdout] test adjacency_list::graph::check::tests::test_graph_with_invalid_node ... ok
[INFO] [stdout] test adjacency_list::graph::check::tests::test_valid_graph ... ok
[INFO] [stdout] test adjacency_list::graph::check::tests::test_graph_with_invalid_edge ... ok
[INFO] [stdout] test adjacency_list::graph::test::cleanup_tests ... ok
[INFO] [stdout] test macro_tests::test_graph_creation ... ok
[INFO] [stdout] test adjacency_list::graph::equality::tests::basic_equality ... ok
[INFO] [stdout] test adjacency_list::graph::equality::tests::cloned_equality ... ok
[INFO] [stdout] test adjacency_list::graph::test::basic_graph ... ok
[INFO] [stdout] test adjacency_list::graph::search::tests::test_searches ... ok
[INFO] [stdout] test adjacency_list::graph::mst::kruskal::test::find_for_class_assignment_9 ... FAILED
[INFO] [stdout] test adjacency_list::graph::mst::kruskal::test::test_one ... FAILED
[INFO] [stdout] test adjacency_list::graph::mst::kruskal::test::test_from_video_create ... FAILED
[INFO] [stdout] test adjacency_list::graph::mst::kruskal::test::test_find_all ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- adjacency_list::graph::mst::kruskal::test::find_for_class_assignment_9 stdout ----
[INFO] [stdout] thread 'adjacency_list::graph::mst::kruskal::test::find_for_class_assignment_9' panicked at src/adjacency_list/graph/mst/kruskal.rs:322:14:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: Failed to create directory
[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-6f17d22bba15001f/anyhow-1.0.92/src/backtrace.rs:27:14
[INFO] [stdout]    1: anyhow::context::<impl anyhow::Context<T,E> for core::result::Result<T,E>>::context
[INFO] [stdout]              at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/anyhow-1.0.92/src/context.rs:54:31
[INFO] [stdout]    2: tux_graph::adjacency_list::graph::mst::kruskal::test::save_graph
[INFO] [stdout]              at ./src/adjacency_list/graph/mst/kruskal.rs:271:13
[INFO] [stdout]    3: tux_graph::adjacency_list::graph::mst::kruskal::test::find_for_class_assignment_9
[INFO] [stdout]              at ./src/adjacency_list/graph/mst/kruskal.rs:318:13
[INFO] [stdout]    4: tux_graph::adjacency_list::graph::mst::kruskal::test::find_for_class_assignment_9::{{closure}}
[INFO] [stdout]              at ./src/adjacency_list/graph/mst/kruskal.rs:296:41
[INFO] [stdout]    5: core::ops::function::FnOnce::call_once
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]    6: core::ops::function::FnOnce::call_once
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]    7: test::__rust_begin_short_backtrace
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/test/src/lib.rs:632:18
[INFO] [stdout]    8: test::run_test_in_process::{{closure}}
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/test/src/lib.rs:655:60
[INFO] [stdout]    9: <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   10: std::panicking::try::do_call
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panicking.rs:557:40
[INFO] [stdout]   11: std::panicking::try
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panicking.rs:520:19
[INFO] [stdout]   12: std::panic::catch_unwind
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panic.rs:358:14
[INFO] [stdout]   13: test::run_test_in_process
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/test/src/lib.rs:655:27
[INFO] [stdout]   14: test::run_test::{{closure}}
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/test/src/lib.rs:576:43
[INFO] [stdout]   15: test::run_test::{{closure}}
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/test/src/lib.rs:606:41
[INFO] [stdout]   16: std::sys::backtrace::__rust_begin_short_backtrace
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/sys/backtrace.rs:154:18
[INFO] [stdout]   17: std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/thread/mod.rs:561:17
[INFO] [stdout]   18: <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   19: std::panicking::try::do_call
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panicking.rs:557:40
[INFO] [stdout]   20: std::panicking::try
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panicking.rs:520:19
[INFO] [stdout]   21: std::panic::catch_unwind
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panic.rs:358:14
[INFO] [stdout]   22: std::thread::Builder::spawn_unchecked_::{{closure}}
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/thread/mod.rs:559:30
[INFO] [stdout]   23: core::ops::function::FnOnce::call_once{{vtable.shim}}
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/alloc/src/boxed.rs:1972:9
[INFO] [stdout]   25: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/alloc/src/boxed.rs:1972:9
[INFO] [stdout]   26: std::sys::pal::unix::thread::Thread::new::thread_start
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/sys/pal/unix/thread.rs:105:17
[INFO] [stdout]   27: <unknown>
[INFO] [stdout]   28: clone
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x643e6a62134a - std::backtrace_rs::backtrace::libunwind::trace::h8810477743020387
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/../../backtrace/src/backtrace/libunwind.rs:116:5
[INFO] [stdout]    1:     0x643e6a62134a - std::backtrace_rs::backtrace::trace_unsynchronized::h3aa55355dd6c54a6
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x643e6a62134a - std::sys::backtrace::_print_fmt::h8588b0f62410823f
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x643e6a62134a - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h98c26ac25ffe89bb
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x643e6a646ea3 - core::fmt::rt::Argument::fmt::hf95377f4aebd453b
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/fmt/rt.rs:177:76
[INFO] [stdout]    5:     0x643e6a646ea3 - core::fmt::write::h0dd5f6e2238c7982
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/fmt/mod.rs:1189:21
[INFO] [stdout]    6:     0x643e6a61e173 - std::io::Write::write_fmt::h03bb0ca26e6faf8c
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/io/mod.rs:1884:15
[INFO] [stdout]    7:     0x643e6a621192 - std::sys::backtrace::BacktraceLock::print::h5c19c1c038ee186d
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    8:     0x643e6a6227cd - std::panicking::default_hook::{{closure}}::h77172f079a1fcb13
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panicking.rs:268:22
[INFO] [stdout]    9:     0x643e6a6225d7 - std::panicking::default_hook::he5f8e3b203ccddba
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panicking.rs:292:9
[INFO] [stdout]   10:     0x643e6a5d0da7 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h7a3c7b4a1ae77f2f
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/alloc/src/boxed.rs:1986:9
[INFO] [stdout]   11:     0x643e6a5d0da7 - test::test_main::{{closure}}::hf0d3b69ae9b353d1
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/test/src/lib.rs:134:21
[INFO] [stdout]   12:     0x643e6a622e78 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h6332e82e7b189abd
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/alloc/src/boxed.rs:1986:9
[INFO] [stdout]   13:     0x643e6a622e78 - std::panicking::rust_panic_with_hook::h53863d4e9018df39
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panicking.rs:809:13
[INFO] [stdout]   14:     0x643e6a622c3a - std::panicking::begin_panic_handler::{{closure}}::h67280e6fa0757873
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panicking.rs:674:13
[INFO] [stdout]   15:     0x643e6a621829 - std::sys::backtrace::__rust_end_short_backtrace::h1dac3f54d6fbbeb2
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/sys/backtrace.rs:170:18
[INFO] [stdout]   16:     0x643e6a6228cc - rust_begin_unwind
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panicking.rs:665:5
[INFO] [stdout]   17:     0x643e6a539c00 - core::panicking::panic_fmt::h6792bd1b2bf01041
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/panicking.rs:76:14
[INFO] [stdout]   18:     0x643e6a53a046 - core::result::unwrap_failed::h05e0602ed34287c5
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/result.rs:1699:5
[INFO] [stdout]   19:     0x643e6a5808a1 - core::result::Result<T,E>::unwrap::ha535360270941b97
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/result.rs:1104:23
[INFO] [stdout]   20:     0x643e6a5808a1 - tux_graph::adjacency_list::graph::mst::kruskal::test::find_for_class_assignment_9::h32961e04a5e17aab
[INFO] [stdout]                                at /opt/rustwide/workdir/src/adjacency_list/graph/mst/kruskal.rs:318:13
[INFO] [stdout]   21:     0x643e6a57faa7 - tux_graph::adjacency_list::graph::mst::kruskal::test::find_for_class_assignment_9::{{closure}}::ha17431fc8e17d03e
[INFO] [stdout]                                at /opt/rustwide/workdir/src/adjacency_list/graph/mst/kruskal.rs:296:41
[INFO] [stdout]   22:     0x643e6a574016 - core::ops::function::FnOnce::call_once::h04a9a16e530a30db
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x643e6a5d58cb - core::ops::function::FnOnce::call_once::h871bf86719ec9aa4
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x643e6a5d58cb - test::__rust_begin_short_backtrace::h2167df1e2b7d76fd
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/test/src/lib.rs:632:18
[INFO] [stdout]   25:     0x643e6a5d52b8 - test::run_test_in_process::{{closure}}::h15d92f75a3adfb79
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/test/src/lib.rs:655:60
[INFO] [stdout]   26:     0x643e6a5d52b8 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hb6c8955835a8dbbb
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   27:     0x643e6a5d52b8 - std::panicking::try::do_call::hc79d0fc888a0bd30
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panicking.rs:557:40
[INFO] [stdout]   28:     0x643e6a5d52b8 - std::panicking::try::hb8a7878e3a8589d6
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panicking.rs:520:19
[INFO] [stdout]   29:     0x643e6a5d52b8 - std::panic::catch_unwind::hb8e4600ff0ff5cfa
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panic.rs:358:14
[INFO] [stdout]   30:     0x643e6a5d52b8 - test::run_test_in_process::hc2900b0b18688dd6
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/test/src/lib.rs:655:27
[INFO] [stdout]   31:     0x643e6a5d52b8 - test::run_test::{{closure}}::hac2a9cb07be3d48d
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/test/src/lib.rs:576:43
[INFO] [stdout]   32:     0x643e6a598d5a - test::run_test::{{closure}}::h4a5b729e66a38cd8
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/test/src/lib.rs:606:41
[INFO] [stdout]   33:     0x643e6a598d5a - std::sys::backtrace::__rust_begin_short_backtrace::h0496fb742492f573
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/sys/backtrace.rs:154:18
[INFO] [stdout]   34:     0x643e6a59c6d4 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hbb6d257c550a54bd
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/thread/mod.rs:561:17
[INFO] [stdout]   35:     0x643e6a59c6d4 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h46696fe4a6832328
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   36:     0x643e6a59c6d4 - std::panicking::try::do_call::h2625a51b667bfb64
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panicking.rs:557:40
[INFO] [stdout]   37:     0x643e6a59c6d4 - std::panicking::try::hb956a59a1973aa4c
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panicking.rs:520:19
[INFO] [stdout]   38:     0x643e6a59c6d4 - std::panic::catch_unwind::h64f3b9d1067ef6a0
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panic.rs:358:14
[INFO] [stdout]   39:     0x643e6a59c6d4 - std::thread::Builder::spawn_unchecked_::{{closure}}::h42b2841295b6c0b2
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/thread/mod.rs:559:30
[INFO] [stdout]   40:     0x643e6a59c6d4 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h6127de71b8124639
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   41:     0x643e6a626deb - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h42f0ba71002a1b2c
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/alloc/src/boxed.rs:1972:9
[INFO] [stdout]   42:     0x643e6a626deb - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::had9e47d7a3dcecb8
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/alloc/src/boxed.rs:1972:9
[INFO] [stdout]   43:     0x643e6a626deb - std::sys::pal::unix::thread::Thread::new::thread_start::h48cf765408f6f5f2
[INFO] [stdout]                                at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/sys/pal/unix/thread.rs:105:17
[INFO] [stdout]   44:     0x72a417f6cac3 - <unknown>
[INFO] [stdout]   45:     0x72a417ffda04 - clone
[INFO] [stdout]   46:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- adjacency_list::graph::mst::kruskal::test::test_one stdout ----
[INFO] [stdout] Error: Failed to create directory
[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-6f17d22bba15001f/anyhow-1.0.92/src/backtrace.rs:27:14
[INFO] [stdout]    1: anyhow::context::<impl anyhow::Context<T,E> for core::result::Result<T,E>>::context
[INFO] [stdout]              at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/anyhow-1.0.92/src/context.rs:54:31
[INFO] [stdout]    2: tux_graph::adjacency_list::graph::mst::kruskal::test::save_graph
[INFO] [stdout]              at ./src/adjacency_list/graph/mst/kruskal.rs:271:13
[INFO] [stdout]    3: tux_graph::adjacency_list::graph::mst::kruskal::test::test_one
[INFO] [stdout]              at ./src/adjacency_list/graph/mst/kruskal.rs:260:9
[INFO] [stdout]    4: tux_graph::adjacency_list::graph::mst::kruskal::test::test_one::{{closure}}
[INFO] [stdout]              at ./src/adjacency_list/graph/mst/kruskal.rs:255:26
[INFO] [stdout]    5: core::ops::function::FnOnce::call_once
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]    6: core::ops::function::FnOnce::call_once
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]    7: test::__rust_begin_short_backtrace
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/test/src/lib.rs:632:18
[INFO] [stdout]    8: test::run_test_in_process::{{closure}}
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/test/src/lib.rs:655:60
[INFO] [stdout]    9: <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   10: std::panicking::try::do_call
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panicking.rs:557:40
[INFO] [stdout]   11: std::panicking::try
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panicking.rs:520:19
[INFO] [stdout]   12: std::panic::catch_unwind
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panic.rs:358:14
[INFO] [stdout]   13: test::run_test_in_process
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/test/src/lib.rs:655:27
[INFO] [stdout]   14: test::run_test::{{closure}}
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/test/src/lib.rs:576:43
[INFO] [stdout]   15: test::run_test::{{closure}}
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/test/src/lib.rs:606:41
[INFO] [stdout]   16: std::sys::backtrace::__rust_begin_short_backtrace
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/sys/backtrace.rs:154:18
[INFO] [stdout]   17: std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/thread/mod.rs:561:17
[INFO] [stdout]   18: <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   19: std::panicking::try::do_call
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panicking.rs:557:40
[INFO] [stdout]   20: std::panicking::try
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panicking.rs:520:19
[INFO] [stdout]   21: std::panic::catch_unwind
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panic.rs:358:14
[INFO] [stdout]   22: std::thread::Builder::spawn_unchecked_::{{closure}}
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/thread/mod.rs:559:30
[INFO] [stdout]   23: core::ops::function::FnOnce::call_once{{vtable.shim}}
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/alloc/src/boxed.rs:1972:9
[INFO] [stdout]   25: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/alloc/src/boxed.rs:1972:9
[INFO] [stdout]   26: std::sys::pal::unix::thread::Thread::new::thread_start
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/sys/pal/unix/thread.rs:105:17
[INFO] [stdout]   27: <unknown>
[INFO] [stdout]   28: clone
[INFO] [stdout] 
[INFO] [stdout] ---- adjacency_list::graph::mst::kruskal::test::test_from_video_create stdout ----
[INFO] [stdout] Error: Failed to save graph
[INFO] [stdout] 
[INFO] [stdout] Caused by:
[INFO] [stdout]     0: Failed to create directory
[INFO] [stdout]     1: 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-6f17d22bba15001f/anyhow-1.0.92/src/backtrace.rs:27:14
[INFO] [stdout]    1: anyhow::context::<impl anyhow::Context<T,E> for core::result::Result<T,E>>::context
[INFO] [stdout]              at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/anyhow-1.0.92/src/context.rs:54:31
[INFO] [stdout]    2: tux_graph::adjacency_list::graph::mst::kruskal::test::save_graph
[INFO] [stdout]              at ./src/adjacency_list/graph/mst/kruskal.rs:271:13
[INFO] [stdout]    3: tux_graph::adjacency_list::graph::mst::kruskal::test::test_from_video_create
[INFO] [stdout]              at ./src/adjacency_list/graph/mst/kruskal.rs:240:9
[INFO] [stdout]    4: tux_graph::adjacency_list::graph::mst::kruskal::test::test_from_video_create::{{closure}}
[INFO] [stdout]              at ./src/adjacency_list/graph/mst/kruskal.rs:235:40
[INFO] [stdout]    5: core::ops::function::FnOnce::call_once
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]    6: core::ops::function::FnOnce::call_once
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]    7: test::__rust_begin_short_backtrace
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/test/src/lib.rs:632:18
[INFO] [stdout]    8: test::run_test_in_process::{{closure}}
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/test/src/lib.rs:655:60
[INFO] [stdout]    9: <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   10: std::panicking::try::do_call
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panicking.rs:557:40
[INFO] [stdout]   11: std::panicking::try
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panicking.rs:520:19
[INFO] [stdout]   12: std::panic::catch_unwind
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panic.rs:358:14
[INFO] [stdout]   13: test::run_test_in_process
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/test/src/lib.rs:655:27
[INFO] [stdout]   14: test::run_test::{{closure}}
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/test/src/lib.rs:576:43
[INFO] [stdout]   15: test::run_test::{{closure}}
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/test/src/lib.rs:606:41
[INFO] [stdout]   16: std::sys::backtrace::__rust_begin_short_backtrace
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/sys/backtrace.rs:154:18
[INFO] [stdout]   17: std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/thread/mod.rs:561:17
[INFO] [stdout]   18: <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   19: std::panicking::try::do_call
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panicking.rs:557:40
[INFO] [stdout]   20: std::panicking::try
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panicking.rs:520:19
[INFO] [stdout]   21: std::panic::catch_unwind
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panic.rs:358:14
[INFO] [stdout]   22: std::thread::Builder::spawn_unchecked_::{{closure}}
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/thread/mod.rs:559:30
[INFO] [stdout]   23: core::ops::function::FnOnce::call_once{{vtable.shim}}
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/alloc/src/boxed.rs:1972:9
[INFO] [stdout]   25: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/alloc/src/boxed.rs:1972:9
[INFO] [stdout]   26: std::sys::pal::unix::thread::Thread::new::thread_start
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/sys/pal/unix/thread.rs:105:17
[INFO] [stdout]   27: <unknown>
[INFO] [stdout]   28: clone
[INFO] [stdout] 
[INFO] [stdout] ---- adjacency_list::graph::mst::kruskal::test::test_find_all stdout ----
[INFO] [stdout] Found 2 msts
[INFO] [stdout] Error: Failed to create directory
[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-6f17d22bba15001f/anyhow-1.0.92/src/backtrace.rs:27:14
[INFO] [stdout]    1: anyhow::context::<impl anyhow::Context<T,E> for core::result::Result<T,E>>::context
[INFO] [stdout]              at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/anyhow-1.0.92/src/context.rs:54:31
[INFO] [stdout]    2: tux_graph::adjacency_list::graph::mst::kruskal::test::save_graph
[INFO] [stdout]              at ./src/adjacency_list/graph/mst/kruskal.rs:271:13
[INFO] [stdout]    3: tux_graph::adjacency_list::graph::mst::kruskal::test::test_find_all
[INFO] [stdout]              at ./src/adjacency_list/graph/mst/kruskal.rs:250:13
[INFO] [stdout]    4: tux_graph::adjacency_list::graph::mst::kruskal::test::test_find_all::{{closure}}
[INFO] [stdout]              at ./src/adjacency_list/graph/mst/kruskal.rs:243:31
[INFO] [stdout]    5: core::ops::function::FnOnce::call_once
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]    6: core::ops::function::FnOnce::call_once
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]    7: test::__rust_begin_short_backtrace
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/test/src/lib.rs:632:18
[INFO] [stdout]    8: test::run_test_in_process::{{closure}}
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/test/src/lib.rs:655:60
[INFO] [stdout]    9: <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   10: std::panicking::try::do_call
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panicking.rs:557:40
[INFO] [stdout]   11: std::panicking::try
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panicking.rs:520:19
[INFO] [stdout]   12: std::panic::catch_unwind
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panic.rs:358:14
[INFO] [stdout]   13: test::run_test_in_process
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/test/src/lib.rs:655:27
[INFO] [stdout]   14: test::run_test::{{closure}}
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/test/src/lib.rs:576:43
[INFO] [stdout]   15: test::run_test::{{closure}}
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/test/src/lib.rs:606:41
[INFO] [stdout]   16: std::sys::backtrace::__rust_begin_short_backtrace
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/sys/backtrace.rs:154:18
[INFO] [stdout]   17: std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/thread/mod.rs:561:17
[INFO] [stdout]   18: <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   19: std::panicking::try::do_call
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panicking.rs:557:40
[INFO] [stdout]   20: std::panicking::try
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panicking.rs:520:19
[INFO] [stdout]   21: std::panic::catch_unwind
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/panic.rs:358:14
[INFO] [stdout]   22: std::thread::Builder::spawn_unchecked_::{{closure}}
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/thread/mod.rs:559:30
[INFO] [stdout]   23: core::ops::function::FnOnce::call_once{{vtable.shim}}
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/alloc/src/boxed.rs:1972:9
[INFO] [stdout]   25: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/alloc/src/boxed.rs:1972:9
[INFO] [stdout]   26: std::sys::pal::unix::thread::Thread::new::thread_start
[INFO] [stdout]              at /rustc/202008a1b8de96d2e5b6bc02d379db03a877d34d/library/std/src/sys/pal/unix/thread.rs:105:17
[INFO] [stdout]   27: <unknown>
[INFO] [stdout]   28: clone
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     adjacency_list::graph::mst::kruskal::test::find_for_class_assignment_9
[INFO] [stdout]     adjacency_list::graph::mst::kruskal::test::test_find_all
[INFO] [stdout]     adjacency_list::graph::mst::kruskal::test::test_from_video_create
[INFO] [stdout]     adjacency_list::graph::mst::kruskal::test::test_one
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 9 passed; 4 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[INFO] running `Command { std: "docker" "inspect" "07849efb709ff34dba3585ff00d558295e6a2dbdfa47d947d2e30669436a4bb1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07849efb709ff34dba3585ff00d558295e6a2dbdfa47d947d2e30669436a4bb1", kill_on_drop: false }`
[INFO] [stdout] 07849efb709ff34dba3585ff00d558295e6a2dbdfa47d947d2e30669436a4bb1
