[INFO] updating cached repository https://github.com/hoyley/koans-rust [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }` [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 1a10ea949df9397eccea9049e03ea8e6ae3cd69e [INFO] checking hoyley/koans-rust against try#0ab79c4b48ad19260fa46623f452c1b403a360e8 for pr-74315 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhoyley%2Fkoans-rust" "/workspace/builds/worker-8/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/hoyley/koans-rust on toolchain 0ab79c4b48ad19260fa46623f452c1b403a360e8 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0ab79c4b48ad19260fa46623f452c1b403a360e8" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/hoyley/koans-rust [INFO] finished tweaking git repo https://github.com/hoyley/koans-rust [INFO] tweaked toml for git repo https://github.com/hoyley/koans-rust written to /workspace/builds/worker-8/source/Cargo.toml [INFO] crate git repo https://github.com/hoyley/koans-rust already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0ab79c4b48ad19260fa46623f452c1b403a360e8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+0ab79c4b48ad19260fa46623f452c1b403a360e8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 46d483fed26c65e815587b43a4c3a81dddaab40d8856cd654cdc1fac2b395f01 [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" "46d483fed26c65e815587b43a4c3a81dddaab40d8856cd654cdc1fac2b395f01", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "46d483fed26c65e815587b43a4c3a81dddaab40d8856cd654cdc1fac2b395f01", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "46d483fed26c65e815587b43a4c3a81dddaab40d8856cd654cdc1fac2b395f01", kill_on_drop: false }` [INFO] [stdout] 46d483fed26c65e815587b43a4c3a81dddaab40d8856cd654cdc1fac2b395f01 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+0ab79c4b48ad19260fa46623f452c1b403a360e8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 016bf97edb858090059c8db8dd0b63d7a41d1d32e407503a07d5ac9a6e0f017e [INFO] running `Command { std: "docker" "start" "-a" "016bf97edb858090059c8db8dd0b63d7a41d1d32e407503a07d5ac9a6e0f017e", kill_on_drop: false }` [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] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/target/debug/build/koans-47379043a99d18b0/build-script-build` (exit code: 101) [INFO] [stderr] --- stderr [INFO] [stderr] thread 'main' panicked at 'Read-only file system (os error 30)', build.rs:13:22 [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x56271c1eff05 - backtrace::backtrace::libunwind::trace::hea89dfbbfe67f40d [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86 [INFO] [stderr] 1: 0x56271c1eff05 - backtrace::backtrace::trace_unsynchronized::hc29c6e6df26d44d7 [INFO] [stderr] at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x56271c1eff05 - std::sys_common::backtrace::_print_fmt::h4c9f4993b039bd03 [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:78 [INFO] [stderr] 3: 0x56271c1eff05 - ::fmt::h91f5cfffa0da5a7a [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:59 [INFO] [stderr] 4: 0x56271c20d0cc - core::fmt::write::h540ac4a6a1232abc [INFO] [stderr] at src/libcore/fmt/mod.rs:1076 [INFO] [stderr] 5: 0x56271c1ee5d2 - std::io::Write::write_fmt::h5e28da8ce574bfe8 [INFO] [stderr] at src/libstd/io/mod.rs:1537 [INFO] [stderr] 6: 0x56271c1f2340 - std::sys_common::backtrace::_print::h0ceef71d03fb70bc [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:62 [INFO] [stderr] 7: 0x56271c1f2340 - std::sys_common::backtrace::print::h1bacb65357a70fca [INFO] [stderr] at src/libstd/sys_common/backtrace.rs:49 [INFO] [stderr] 8: 0x56271c1f2340 - std::panicking::default_hook::{{closure}}::h249639eade443064 [INFO] [stderr] at src/libstd/panicking.rs:198 [INFO] [stderr] 9: 0x56271c1f208c - std::panicking::default_hook::hbe64ddeb621910df [INFO] [stderr] at src/libstd/panicking.rs:217 [INFO] [stderr] 10: 0x56271c1f2983 - std::panicking::rust_panic_with_hook::h16376479909ace6a [INFO] [stderr] at src/libstd/panicking.rs:526 [INFO] [stderr] 11: 0x56271c1f257b - rust_begin_unwind [INFO] [stderr] at src/libstd/panicking.rs:437 [INFO] [stderr] 12: 0x56271c1f24eb - std::panicking::begin_panic_fmt::haa0f8c6fd703cf97 [INFO] [stderr] at src/libstd/panicking.rs:391 [INFO] [stderr] 13: 0x56271c1e7d36 - build_script_build::main::h22a8cd92501fef32 [INFO] [stderr] at /opt/rustwide/workdir/build.rs:13 [INFO] [stderr] 14: 0x56271c1e7eab - std::rt::lang_start::{{closure}}::hb3823456b08de761 [INFO] [stderr] at /rustc/0ab79c4b48ad19260fa46623f452c1b403a360e8/src/libstd/rt.rs:67 [INFO] [stderr] 15: 0x56271c1f2d53 - std::rt::lang_start_internal::{{closure}}::h6d7ca43fc52cff4a [INFO] [stderr] at src/libstd/rt.rs:52 [INFO] [stderr] 16: 0x56271c1f2d53 - std::panicking::try::do_call::h89610ba8f4fbfe54 [INFO] [stderr] at src/libstd/panicking.rs:348 [INFO] [stderr] 17: 0x56271c1f2d53 - std::panicking::try::h69595087e4498dc2 [INFO] [stderr] at src/libstd/panicking.rs:325 [INFO] [stderr] 18: 0x56271c1f2d53 - std::panic::catch_unwind::ha2aa2ebd78a46e0d [INFO] [stderr] at src/libstd/panic.rs:394 [INFO] [stderr] 19: 0x56271c1f2d53 - std::rt::lang_start_internal::h2ae59503bb8c048c [INFO] [stderr] at src/libstd/rt.rs:51 [INFO] [stderr] 20: 0x56271c1e7e87 - std::rt::lang_start::h30f24763ef11c5d8 [INFO] [stderr] at /rustc/0ab79c4b48ad19260fa46623f452c1b403a360e8/src/libstd/rt.rs:67 [INFO] [stderr] 21: 0x56271c1e7e0a - main [INFO] [stderr] 22: 0x7f84d457f0b3 - __libc_start_main [INFO] [stderr] 23: 0x56271c1e517e - _start [INFO] [stderr] 24: 0x0 - [INFO] running `Command { std: "docker" "inspect" "016bf97edb858090059c8db8dd0b63d7a41d1d32e407503a07d5ac9a6e0f017e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "016bf97edb858090059c8db8dd0b63d7a41d1d32e407503a07d5ac9a6e0f017e", kill_on_drop: false }` [INFO] [stdout] 016bf97edb858090059c8db8dd0b63d7a41d1d32e407503a07d5ac9a6e0f017e