[INFO] cloning repository https://github.com/j3h/rust-koans
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/j3h/rust-koans" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fj3h%2Frust-koans", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fj3h%2Frust-koans'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cc29866cd11b1e11dd61018baddd0f75fe6c3310
[INFO] checking j3h/rust-koans against master#3350c1eb3fd8fe1bee1ed4c76944d707bd256876 for pr-140558
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fj3h%2Frust-koans" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/j3h/rust-koans on toolchain 3350c1eb3fd8fe1bee1ed4c76944d707bd256876
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3350c1eb3fd8fe1bee1ed4c76944d707bd256876" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/j3h/rust-koans
[INFO] finished tweaking git repo https://github.com/j3h/rust-koans
[INFO] tweaked toml for git repo https://github.com/j3h/rust-koans written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/j3h/rust-koans 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" "+3350c1eb3fd8fe1bee1ed4c76944d707bd256876" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+3350c1eb3fd8fe1bee1ed4c76944d707bd256876" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f6785701373e34459ab4cfeb9ef2dd5c990dab111ea6ca5c78e887a0ff38cb26
[INFO] running `Command { std: "docker" "start" "-a" "f6785701373e34459ab4cfeb9ef2dd5c990dab111ea6ca5c78e887a0ff38cb26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f6785701373e34459ab4cfeb9ef2dd5c990dab111ea6ca5c78e887a0ff38cb26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6785701373e34459ab4cfeb9ef2dd5c990dab111ea6ca5c78e887a0ff38cb26", kill_on_drop: false }`
[INFO] [stdout] f6785701373e34459ab4cfeb9ef2dd5c990dab111ea6ca5c78e887a0ff38cb26
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+3350c1eb3fd8fe1bee1ed4c76944d707bd256876" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 06fa8a1a38b6d9a23808f4ffae875ffa4af9238d8766de2eff3e108a4dc06560
[INFO] running `Command { std: "docker" "start" "-a" "06fa8a1a38b6d9a23808f4ffae875ffa4af9238d8766de2eff3e108a4dc06560", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling koans v0.2.2 (/opt/rustwide/workdir)
[INFO] [stderr] error: failed to run custom build command for `koans v0.2.2 (/opt/rustwide/workdir)`
[INFO] [stderr] note: To improve backtraces for build dependencies, set the CARGO_PROFILE_DEV_BUILD_OVERRIDE_DEBUG=true environment variable to enable debug information generation.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/koans-4a28024071439e5c/build-script-build` (exit status: 101)
[INFO] [stderr]   --- stderr
[INFO] [stderr] 
[INFO] [stderr]   thread 'main' panicked at build.rs:13:22:
[INFO] [stderr]   Read-only file system (os error 30)
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x60a323a90162 - std::backtrace_rs::backtrace::libunwind::trace::h563a2beac1baee5d
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stderr]      1:     0x60a323a90162 - std::backtrace_rs::backtrace::trace_unsynchronized::hdc700c8ea914f702
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stderr]      2:     0x60a323a90162 - std::sys::backtrace::_print_fmt::h1b39b2ce6204063a
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/sys/backtrace.rs:66:9
[INFO] [stderr]      3:     0x60a323a90162 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h542d155fb00771a6
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/sys/backtrace.rs:39:26
[INFO] [stderr]      4:     0x60a323aab013 - core::fmt::rt::Argument::fmt::h387f243e796dbb39
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/core/src/fmt/rt.rs:179:76
[INFO] [stderr]      5:     0x60a323aab013 - core::fmt::write::h5c20ef0aafe2b529
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/core/src/fmt/mod.rs:1481:25
[INFO] [stderr]      6:     0x60a323a8dcd3 - std::io::default_write_fmt::hcd6191d430111ac5
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/io/mod.rs:639:11
[INFO] [stderr]      7:     0x60a323a8dcd3 - std::io::Write::write_fmt::hac11ffd732faa171
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/io/mod.rs:1914:13
[INFO] [stderr]      8:     0x60a323a8ffb2 - std::sys::backtrace::BacktraceLock::print::h47f90f237b73cbf4
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/sys/backtrace.rs:42:9
[INFO] [stderr]      9:     0x60a323a91022 - std::panicking::default_hook::{{closure}}::h6282c72a1387d25f
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/panicking.rs:300:22
[INFO] [stderr]     10:     0x60a323a90e25 - std::panicking::default_hook::he6b494ff3c83ead4
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/panicking.rs:327:9
[INFO] [stderr]     11:     0x60a323a918f2 - std::panicking::rust_panic_with_hook::h149b08272aeb16bc
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/panicking.rs:833:13
[INFO] [stderr]     12:     0x60a323a9178a - std::panicking::begin_panic_handler::{{closure}}::hcdbe86989a0ba44a
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/panicking.rs:706:13
[INFO] [stderr]     13:     0x60a323a90659 - std::sys::backtrace::__rust_end_short_backtrace::hf8d59804c2387dc6
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/sys/backtrace.rs:168:18
[INFO] [stderr]     14:     0x60a323a9141d - __rustc[2d4870ff425ddf61]::rust_begin_unwind
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/panicking.rs:697:5
[INFO] [stderr]     15:     0x60a323aaa2c0 - core::panicking::panic_fmt::he8c25f98fc794a04
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/core/src/panicking.rs:75:14
[INFO] [stderr]     16:     0x60a323a703c8 - core::panicking::panic_display::heda932239bcea4fe
[INFO] [stderr]     17:     0x60a323a70b8b - build_script_build::main::h51ebd18317cbc901
[INFO] [stderr]     18:     0x60a323a6fdb3 - core::ops::function::FnOnce::call_once::h390b1e96aa741a5e
[INFO] [stderr]     19:     0x60a323a6fc46 - std::sys::backtrace::__rust_begin_short_backtrace::h74449009dfa98463
[INFO] [stderr]     20:     0x60a323a6f9e9 - std::rt::lang_start::{{closure}}::h76f8eba9dc20b391
[INFO] [stderr]     21:     0x60a323a8b9b0 - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h7076474eed8656b3
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/core/src/ops/function.rs:284:13
[INFO] [stderr]     22:     0x60a323a8b9b0 - std::panicking::try::do_call::hbd0cac780971e5ed
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/panicking.rs:589:40
[INFO] [stderr]     23:     0x60a323a8b9b0 - std::panicking::try::h3cbc02d8aba51c73
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/panicking.rs:552:19
[INFO] [stderr]     24:     0x60a323a8b9b0 - std::panic::catch_unwind::h6b36eecd966bb8ff
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/panic.rs:359:14
[INFO] [stderr]     25:     0x60a323a8b9b0 - std::rt::lang_start_internal::{{closure}}::hdbe6db4edf3386dc
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/rt.rs:168:24
[INFO] [stderr]     26:     0x60a323a8b9b0 - std::panicking::try::do_call::h510fcf1b84eec1a9
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/panicking.rs:589:40
[INFO] [stderr]     27:     0x60a323a8b9b0 - std::panicking::try::h3dc1c9c2c726907f
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/panicking.rs:552:19
[INFO] [stderr]     28:     0x60a323a8b9b0 - std::panic::catch_unwind::haa7a05f30e57423e
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/panic.rs:359:14
[INFO] [stderr]     29:     0x60a323a8b9b0 - std::rt::lang_start_internal::h85e7d85bc582d158
[INFO] [stderr]                                  at /rustc/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/library/std/src/rt.rs:164:5
[INFO] [stderr]     30:     0x60a323a6f9d1 - std::rt::lang_start::h5556a1f07e429d70
[INFO] [stderr]     31:     0x60a323a70ba5 - main
[INFO] [stderr]     32:     0x7be5dce841ca - <unknown>
[INFO] [stderr]     33:     0x7be5dce8428b - __libc_start_main
[INFO] [stderr]     34:     0x60a323a6e945 - _start
[INFO] [stderr]     35:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "06fa8a1a38b6d9a23808f4ffae875ffa4af9238d8766de2eff3e108a4dc06560", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06fa8a1a38b6d9a23808f4ffae875ffa4af9238d8766de2eff3e108a4dc06560", kill_on_drop: false }`
[INFO] [stdout] 06fa8a1a38b6d9a23808f4ffae875ffa4af9238d8766de2eff3e108a4dc06560
