[INFO] cloning repository https://github.com/alexclear/rust-koans-answers [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alexclear/rust-koans-answers" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexclear%2Frust-koans-answers", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexclear%2Frust-koans-answers'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 89e124c056c315e10c6d5ab8548902c0cfc64be5 [INFO] checking alexclear/rust-koans-answers against master#7dc9ff5c629753b6930ecfe9a0446538b8e25fb7 for pr-85387 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexclear%2Frust-koans-answers" "/workspace/builds/worker-7/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/alexclear/rust-koans-answers on toolchain 7dc9ff5c629753b6930ecfe9a0446538b8e25fb7 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7dc9ff5c629753b6930ecfe9a0446538b8e25fb7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/alexclear/rust-koans-answers [INFO] finished tweaking git repo https://github.com/alexclear/rust-koans-answers [INFO] tweaked toml for git repo https://github.com/alexclear/rust-koans-answers written to /workspace/builds/worker-7/source/Cargo.toml [INFO] crate git repo https://github.com/alexclear/rust-koans-answers already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7dc9ff5c629753b6930ecfe9a0446538b8e25fb7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+7dc9ff5c629753b6930ecfe9a0446538b8e25fb7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 1de527046d6eeb2aaded0e8f8aba43d9b47fbc8122e39ec484df90e4e5abecc7 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "1de527046d6eeb2aaded0e8f8aba43d9b47fbc8122e39ec484df90e4e5abecc7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "1de527046d6eeb2aaded0e8f8aba43d9b47fbc8122e39ec484df90e4e5abecc7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1de527046d6eeb2aaded0e8f8aba43d9b47fbc8122e39ec484df90e4e5abecc7", kill_on_drop: false }` [INFO] [stdout] 1de527046d6eeb2aaded0e8f8aba43d9b47fbc8122e39ec484df90e4e5abecc7 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+7dc9ff5c629753b6930ecfe9a0446538b8e25fb7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 7e6b91f34accf872b7f872924badf59450884243d5de2d095a2d623d82d4e43e [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "7e6b91f34accf872b7f872924badf59450884243d5de2d095a2d623d82d4e43e", kill_on_drop: false }` [INFO] [stderr] Compiling koans v0.2.0 (/opt/rustwide/workdir) [INFO] [stderr] error: failed to run custom build command for `koans v0.2.0 (/opt/rustwide/workdir)` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/target/debug/build/koans-dd4c58307ba92316/build-script-build` (exit status: 101) [INFO] [stderr] --- stderr [INFO] [stderr] thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: Other, message: "Read-only file system" }', build.rs:7:10 [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x55d78bce01b0 - std::backtrace_rs::backtrace::libunwind::trace::h1037ca7e6eeef65c [INFO] [stderr] at /rustc/7dc9ff5c629753b6930ecfe9a0446538b8e25fb7/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5 [INFO] [stderr] 1: 0x55d78bce01b0 - std::backtrace_rs::backtrace::trace_unsynchronized::haaefac1bc3669450 [INFO] [stderr] at /rustc/7dc9ff5c629753b6930ecfe9a0446538b8e25fb7/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 [INFO] [stderr] 2: 0x55d78bce01b0 - std::sys_common::backtrace::_print_fmt::h863a6f5e6d995885 [INFO] [stderr] at /rustc/7dc9ff5c629753b6930ecfe9a0446538b8e25fb7/library/std/src/sys_common/backtrace.rs:67:5 [INFO] [stderr] 3: 0x55d78bce01b0 - ::fmt::h767e17e1aa7df6a8 [INFO] [stderr] at /rustc/7dc9ff5c629753b6930ecfe9a0446538b8e25fb7/library/std/src/sys_common/backtrace.rs:46:22 [INFO] [stderr] 4: 0x55d78bcfa41f - core::fmt::write::h7aa6cd0067dca82a [INFO] [stderr] at /rustc/7dc9ff5c629753b6930ecfe9a0446538b8e25fb7/library/core/src/fmt/mod.rs:1094:17 [INFO] [stderr] 5: 0x55d78bcdeaf5 - std::io::Write::write_fmt::h4c802b6f761026c1 [INFO] [stderr] at /rustc/7dc9ff5c629753b6930ecfe9a0446538b8e25fb7/library/std/src/io/mod.rs:1584:15 [INFO] [stderr] 6: 0x55d78bce1dfb - std::sys_common::backtrace::_print::h2769edb26a7eb606 [INFO] [stderr] at /rustc/7dc9ff5c629753b6930ecfe9a0446538b8e25fb7/library/std/src/sys_common/backtrace.rs:49:5 [INFO] [stderr] 7: 0x55d78bce1dfb - std::sys_common::backtrace::print::ha71f3549862b4cb6 [INFO] [stderr] at /rustc/7dc9ff5c629753b6930ecfe9a0446538b8e25fb7/library/std/src/sys_common/backtrace.rs:36:9 [INFO] [stderr] 8: 0x55d78bce1dfb - std::panicking::default_hook::{{closure}}::h95488a3bade217f6 [INFO] [stderr] at /rustc/7dc9ff5c629753b6930ecfe9a0446538b8e25fb7/library/std/src/panicking.rs:208:50 [INFO] [stderr] 9: 0x55d78bce18d1 - std::panicking::default_hook::h290aa602c0fb11df [INFO] [stderr] at /rustc/7dc9ff5c629753b6930ecfe9a0446538b8e25fb7/library/std/src/panicking.rs:225:9 [INFO] [stderr] 10: 0x55d78bce2410 - std::panicking::rust_panic_with_hook::hf32c4fa635e215f2 [INFO] [stderr] at /rustc/7dc9ff5c629753b6930ecfe9a0446538b8e25fb7/library/std/src/panicking.rs:625:17 [INFO] [stderr] 11: 0x55d78bce1fa7 - std::panicking::begin_panic_handler::{{closure}}::h95197ccd88846f7a [INFO] [stderr] at /rustc/7dc9ff5c629753b6930ecfe9a0446538b8e25fb7/library/std/src/panicking.rs:519:13 [INFO] [stderr] 12: 0x55d78bce064c - std::sys_common::backtrace::__rust_end_short_backtrace::h7641df9566f7b7d0 [INFO] [stderr] at /rustc/7dc9ff5c629753b6930ecfe9a0446538b8e25fb7/library/std/src/sys_common/backtrace.rs:141:18 [INFO] [stderr] 13: 0x55d78bce1f09 - rust_begin_unwind [INFO] [stderr] at /rustc/7dc9ff5c629753b6930ecfe9a0446538b8e25fb7/library/std/src/panicking.rs:515:5 [INFO] [stderr] 14: 0x55d78bcd0dc1 - core::panicking::panic_fmt::hbe99dddd3092ba3c [INFO] [stderr] at /rustc/7dc9ff5c629753b6930ecfe9a0446538b8e25fb7/library/core/src/panicking.rs:92:14 [INFO] [stderr] 15: 0x55d78bcd0e53 - core::result::unwrap_failed::hf79563fef9d11ab8 [INFO] [stderr] at /rustc/7dc9ff5c629753b6930ecfe9a0446538b8e25fb7/library/core/src/result.rs:1355:5 [INFO] [stderr] 16: 0x55d78bcd1f4a - core::result::Result::unwrap::h5f77f2317a5c620f [INFO] [stderr] at /rustc/7dc9ff5c629753b6930ecfe9a0446538b8e25fb7/library/core/src/result.rs:1037:23 [INFO] [stderr] 17: 0x55d78bcd1d91 - build_script_build::main::h59632e704e81bd39 [INFO] [stderr] at /opt/rustwide/workdir/build.rs:4:5 [INFO] [stderr] 18: 0x55d78bcd1b5b - core::ops::function::FnOnce::call_once::hfaef590dca4e7c45 [INFO] [stderr] at /rustc/7dc9ff5c629753b6930ecfe9a0446538b8e25fb7/library/core/src/ops/function.rs:227:5 [INFO] [stderr] 19: 0x55d78bcd1a3e - std::sys_common::backtrace::__rust_begin_short_backtrace::had72c83726294344 [INFO] [stderr] at /rustc/7dc9ff5c629753b6930ecfe9a0446538b8e25fb7/library/std/src/sys_common/backtrace.rs:125:18 [INFO] [stderr] 20: 0x55d78bcd1e21 - std::rt::lang_start::{{closure}}::hf38708cb42d08804 [INFO] [stderr] at /rustc/7dc9ff5c629753b6930ecfe9a0446538b8e25fb7/library/std/src/rt.rs:49:18 [INFO] [stderr] 21: 0x55d78bce284a - core::ops::function::impls:: for &F>::call_once::h04259e4a34d07c2f [INFO] [stderr] at /rustc/7dc9ff5c629753b6930ecfe9a0446538b8e25fb7/library/core/src/ops/function.rs:259:13 [INFO] [stderr] 22: 0x55d78bce284a - std::panicking::try::do_call::hb8da45704d5cfbbf [INFO] [stderr] at /rustc/7dc9ff5c629753b6930ecfe9a0446538b8e25fb7/library/std/src/panicking.rs:401:40 [INFO] [stderr] 23: 0x55d78bce284a - std::panicking::try::h4beadc19a78fec52 [INFO] [stderr] at /rustc/7dc9ff5c629753b6930ecfe9a0446538b8e25fb7/library/std/src/panicking.rs:365:19 [INFO] [stderr] 24: 0x55d78bce284a - std::panic::catch_unwind::hc58016cd36ba81a4 [INFO] [stderr] at /rustc/7dc9ff5c629753b6930ecfe9a0446538b8e25fb7/library/std/src/panic.rs:433:14 [INFO] [stderr] 25: 0x55d78bce284a - std::rt::lang_start_internal::hc51399759a90501a [INFO] [stderr] at /rustc/7dc9ff5c629753b6930ecfe9a0446538b8e25fb7/library/std/src/rt.rs:34:21 [INFO] [stderr] 26: 0x55d78bcd1e00 - std::rt::lang_start::h8cd3da93a342fc53 [INFO] [stderr] at /rustc/7dc9ff5c629753b6930ecfe9a0446538b8e25fb7/library/std/src/rt.rs:48:5 [INFO] [stderr] 27: 0x55d78bcd1dcc - main [INFO] [stderr] 28: 0x7f4ca4d790b3 - __libc_start_main [INFO] [stderr] 29: 0x55d78bcd151e - _start [INFO] [stderr] 30: 0x0 - [INFO] running `Command { std: "docker" "inspect" "7e6b91f34accf872b7f872924badf59450884243d5de2d095a2d623d82d4e43e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7e6b91f34accf872b7f872924badf59450884243d5de2d095a2d623d82d4e43e", kill_on_drop: false }` [INFO] [stdout] 7e6b91f34accf872b7f872924badf59450884243d5de2d095a2d623d82d4e43e