[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] testing j3h/rust-koans against try#db823df02fd0c2cf67b43025ac3fef3f2d743245 for pr-150681-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fj3h%2Frust-koans" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[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-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/j3h/rust-koans on toolchain db823df02fd0c2cf67b43025ac3fef3f2d743245
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b6f6fb917cf78c70f0df530ad5bd4994ea26ad9dfc1c6fd49e516e8367542977
[INFO] running `Command { std: "docker" "start" "-a" "b6f6fb917cf78c70f0df530ad5bd4994ea26ad9dfc1c6fd49e516e8367542977", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b6f6fb917cf78c70f0df530ad5bd4994ea26ad9dfc1c6fd49e516e8367542977", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6f6fb917cf78c70f0df530ad5bd4994ea26ad9dfc1c6fd49e516e8367542977", kill_on_drop: false }`
[INFO] [stdout] b6f6fb917cf78c70f0df530ad5bd4994ea26ad9dfc1c6fd49e516e8367542977
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+db823df02fd0c2cf67b43025ac3fef3f2d743245" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 98e4ae87f4c0853d5db3b60461446a7acea7b2b92f9dc4c70f9ad801228a9ac3
[INFO] running `Command { std: "docker" "start" "-a" "98e4ae87f4c0853d5db3b60461446a7acea7b2b92f9dc4c70f9ad801228a9ac3", 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' (53) panicked at build.rs:13:22:
[INFO] [stderr]   Read-only file system (os error 30)
[INFO] [stderr]   stack backtrace:
[INFO] [stderr]      0:     0x577d544edae2 - std[3f03f8b59f91bef1]::backtrace_rs::backtrace::libunwind::trace
[INFO] [stderr]                                  at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stderr]      1:     0x577d544edae2 - std[3f03f8b59f91bef1]::backtrace_rs::backtrace::trace_unsynchronized::<std[3f03f8b59f91bef1]::sys::backtrace::_print_fmt::{closure#1}>
[INFO] [stderr]                                  at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stderr]      2:     0x577d544edae2 - std[3f03f8b59f91bef1]::sys::backtrace::_print_fmt
[INFO] [stderr]                                  at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/backtrace.rs:74:9
[INFO] [stderr]      3:     0x577d544edae2 - <<std[3f03f8b59f91bef1]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[585f66e14d78f9ba]::fmt::Display>::fmt
[INFO] [stderr]                                  at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/backtrace.rs:44:26
[INFO] [stderr]      4:     0x577d544feb4a - <core[585f66e14d78f9ba]::fmt::rt::Argument>::fmt
[INFO] [stderr]                                  at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/fmt/rt.rs:152:76
[INFO] [stderr]      5:     0x577d544feb4a - core[585f66e14d78f9ba]::fmt::write
[INFO] [stderr]      6:     0x577d544f19f6 - std[3f03f8b59f91bef1]::io::default_write_fmt::<std[3f03f8b59f91bef1]::sys::stdio::unix::Stderr>
[INFO] [stderr]                                  at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/io/mod.rs:639:11
[INFO] [stderr]      7:     0x577d544f19f6 - <std[3f03f8b59f91bef1]::sys::stdio::unix::Stderr as std[3f03f8b59f91bef1]::io::Write>::write_fmt
[INFO] [stderr]                                  at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/io/mod.rs:1994:13
[INFO] [stderr]      8:     0x577d544d8dcf - <std[3f03f8b59f91bef1]::sys::backtrace::BacktraceLock>::print
[INFO] [stderr]                                  at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/backtrace.rs:47:9
[INFO] [stderr]      9:     0x577d544d8dcf - std[3f03f8b59f91bef1]::panicking::default_hook::{closure#0}
[INFO] [stderr]                                  at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:292:27
[INFO] [stderr]     10:     0x577d544e9fe1 - std[3f03f8b59f91bef1]::panicking::default_hook
[INFO] [stderr]                                  at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:319:9
[INFO] [stderr]     11:     0x577d544ea19b - std[3f03f8b59f91bef1]::panicking::panic_with_hook
[INFO] [stderr]                                  at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:825:13
[INFO] [stderr]     12:     0x577d544d8e88 - std[3f03f8b59f91bef1]::panicking::panic_handler::{closure#0}
[INFO] [stderr]                                  at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:698:13
[INFO] [stderr]     13:     0x577d544ce3a9 - std[3f03f8b59f91bef1]::sys::backtrace::__rust_end_short_backtrace::<std[3f03f8b59f91bef1]::panicking::panic_handler::{closure#0}, !>
[INFO] [stderr]                                  at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/sys/backtrace.rs:182:18
[INFO] [stderr]     14:     0x577d544d96ad - __rustc[caa99d26c7bae192]::rust_begin_unwind
[INFO] [stderr]                                  at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:689:5
[INFO] [stderr]     15:     0x577d544ff17c - core[585f66e14d78f9ba]::panicking::panic_fmt
[INFO] [stderr]                                  at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/panicking.rs:80:14
[INFO] [stderr]     16:     0x577d544c1462 - core[585f66e14d78f9ba]::panicking::panic_display::<std[3f03f8b59f91bef1]::io::error::Error>
[INFO] [stderr]     17:     0x577d544c1980 - build_script_build[15aa9f618ae992d3]::main
[INFO] [stderr]     18:     0x577d544c2b93 - <fn() as core[585f66e14d78f9ba]::ops::function::FnOnce<()>>::call_once
[INFO] [stderr]     19:     0x577d544c1476 - std[3f03f8b59f91bef1]::sys::backtrace::__rust_begin_short_backtrace::<fn(), ()>
[INFO] [stderr]     20:     0x577d544c1729 - std[3f03f8b59f91bef1]::rt::lang_start::<()>::{closure#0}
[INFO] [stderr]     21:     0x577d544e95d6 - <&dyn core[585f66e14d78f9ba]::ops::function::Fn<(), Output = i32> + core[585f66e14d78f9ba]::marker::Sync + core[585f66e14d78f9ba]::panic::unwind_safe::RefUnwindSafe as core[585f66e14d78f9ba]::ops::function::FnOnce<()>>::call_once
[INFO] [stderr]                                  at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/core/src/ops/function.rs:287:21
[INFO] [stderr]     22:     0x577d544e95d6 - std[3f03f8b59f91bef1]::panicking::catch_unwind::do_call::<&dyn core[585f66e14d78f9ba]::ops::function::Fn<(), Output = i32> + core[585f66e14d78f9ba]::marker::Sync + core[585f66e14d78f9ba]::panic::unwind_safe::RefUnwindSafe, i32>
[INFO] [stderr]                                  at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:581:40
[INFO] [stderr]     23:     0x577d544e95d6 - std[3f03f8b59f91bef1]::panicking::catch_unwind::<i32, &dyn core[585f66e14d78f9ba]::ops::function::Fn<(), Output = i32> + core[585f66e14d78f9ba]::marker::Sync + core[585f66e14d78f9ba]::panic::unwind_safe::RefUnwindSafe>
[INFO] [stderr]                                  at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:544:19
[INFO] [stderr]     24:     0x577d544e95d6 - std[3f03f8b59f91bef1]::panic::catch_unwind::<&dyn core[585f66e14d78f9ba]::ops::function::Fn<(), Output = i32> + core[585f66e14d78f9ba]::marker::Sync + core[585f66e14d78f9ba]::panic::unwind_safe::RefUnwindSafe, i32>
[INFO] [stderr]                                  at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panic.rs:359:14
[INFO] [stderr]     25:     0x577d544e95d6 - std[3f03f8b59f91bef1]::rt::lang_start_internal::{closure#0}
[INFO] [stderr]                                  at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/rt.rs:175:24
[INFO] [stderr]     26:     0x577d544e95d6 - std[3f03f8b59f91bef1]::panicking::catch_unwind::do_call::<std[3f03f8b59f91bef1]::rt::lang_start_internal::{closure#0}, isize>
[INFO] [stderr]                                  at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:581:40
[INFO] [stderr]     27:     0x577d544e95d6 - std[3f03f8b59f91bef1]::panicking::catch_unwind::<isize, std[3f03f8b59f91bef1]::rt::lang_start_internal::{closure#0}>
[INFO] [stderr]                                  at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panicking.rs:544:19
[INFO] [stderr]     28:     0x577d544e95d6 - std[3f03f8b59f91bef1]::panic::catch_unwind::<std[3f03f8b59f91bef1]::rt::lang_start_internal::{closure#0}, isize>
[INFO] [stderr]                                  at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/panic.rs:359:14
[INFO] [stderr]     29:     0x577d544e95d6 - std[3f03f8b59f91bef1]::rt::lang_start_internal
[INFO] [stderr]                                  at /rustc/db823df02fd0c2cf67b43025ac3fef3f2d743245/library/std/src/rt.rs:171:5
[INFO] [stderr]     30:     0x577d544c1261 - std[3f03f8b59f91bef1]::rt::lang_start::<()>
[INFO] [stderr]     31:     0x577d544c3195 - main
[INFO] [stderr]     32:     0x72464f5af1ca - <unknown>
[INFO] [stderr]     33:     0x72464f5af28b - __libc_start_main
[INFO] [stderr]     34:     0x577d544c0f15 - _start
[INFO] [stderr]     35:                0x0 - <unknown>
[INFO] running `Command { std: "docker" "inspect" "98e4ae87f4c0853d5db3b60461446a7acea7b2b92f9dc4c70f9ad801228a9ac3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98e4ae87f4c0853d5db3b60461446a7acea7b2b92f9dc4c70f9ad801228a9ac3", kill_on_drop: false }`
[INFO] [stdout] 98e4ae87f4c0853d5db3b60461446a7acea7b2b92f9dc4c70f9ad801228a9ac3