[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 try#169954edd744527414c631e9af1bbdc537b0cdf2 for pr-75192 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fj3h%2Frust-koans" "/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/j3h/rust-koans on toolchain 169954edd744527414c631e9af1bbdc537b0cdf2 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+169954edd744527414c631e9af1bbdc537b0cdf2" "read-manifest" "--manifest-path" "Cargo.toml", 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-7/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: "/workspace/cargo-home/bin/cargo" "+169954edd744527414c631e9af1bbdc537b0cdf2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [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" "rustops/crates-build-env@sha256:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+169954edd744527414c631e9af1bbdc537b0cdf2" "metadata" "--no-deps" "--format-version=1", 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] 0e5a147c6366222a30036b8ca765445db65dc16928680e1a8201a2e1a44668e7 [INFO] running `Command { std: "docker" "start" "-a" "0e5a147c6366222a30036b8ca765445db65dc16928680e1a8201a2e1a44668e7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "0e5a147c6366222a30036b8ca765445db65dc16928680e1a8201a2e1a44668e7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0e5a147c6366222a30036b8ca765445db65dc16928680e1a8201a2e1a44668e7", kill_on_drop: false }` [INFO] [stdout] 0e5a147c6366222a30036b8ca765445db65dc16928680e1a8201a2e1a44668e7 [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" "rustops/crates-build-env@sha256:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+169954edd744527414c631e9af1bbdc537b0cdf2" "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] 41b092d5c85103472f4e29df67fdc62105ae9d1521e317c555449f4fea99896e [INFO] running `Command { std: "docker" "start" "-a" "41b092d5c85103472f4e29df67fdc62105ae9d1521e317c555449f4fea99896e", 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-d9642fd870ee5afc/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: 0x55b779afc82f - std::backtrace_rs::backtrace::libunwind::trace::h21c0966c343fddd8 [INFO] [stderr] at /rustc/169954edd744527414c631e9af1bbdc537b0cdf2/library/std/src/../../backtrace/src/backtrace/libunwind.rs:96 [INFO] [stderr] 1: 0x55b779afc82f - std::backtrace_rs::backtrace::trace_unsynchronized::h62cde0754779ae3a [INFO] [stderr] at /rustc/169954edd744527414c631e9af1bbdc537b0cdf2/library/std/src/../../backtrace/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x55b779afc82f - std::sys_common::backtrace::_print_fmt::hb2d70198918acf1c [INFO] [stderr] at /rustc/169954edd744527414c631e9af1bbdc537b0cdf2/library/std/src/sys_common/backtrace.rs:77 [INFO] [stderr] 3: 0x55b779afc82f - ::fmt::h5a9d4ddd4d99b877 [INFO] [stderr] at /rustc/169954edd744527414c631e9af1bbdc537b0cdf2/library/std/src/sys_common/backtrace.rs:58 [INFO] [stderr] 4: 0x55b779b1648c - core::fmt::write::h3a043650ba7bf668 [INFO] [stderr] at /rustc/169954edd744527414c631e9af1bbdc537b0cdf2/library/core/src/fmt/mod.rs:1117 [INFO] [stderr] 5: 0x55b779afaf95 - std::io::Write::write_fmt::h2dbf1bb0d9f42142 [INFO] [stderr] at /rustc/169954edd744527414c631e9af1bbdc537b0cdf2/library/std/src/io/mod.rs:1510 [INFO] [stderr] 6: 0x55b779afed50 - std::sys_common::backtrace::_print::h1091565a54a3c462 [INFO] [stderr] at /rustc/169954edd744527414c631e9af1bbdc537b0cdf2/library/std/src/sys_common/backtrace.rs:61 [INFO] [stderr] 7: 0x55b779afed50 - std::sys_common::backtrace::print::hc9759e13a502cda2 [INFO] [stderr] at /rustc/169954edd744527414c631e9af1bbdc537b0cdf2/library/std/src/sys_common/backtrace.rs:48 [INFO] [stderr] 8: 0x55b779afed50 - std::panicking::default_hook::{{closure}}::hd35b8516a1d88160 [INFO] [stderr] at /rustc/169954edd744527414c631e9af1bbdc537b0cdf2/library/std/src/panicking.rs:198 [INFO] [stderr] 9: 0x55b779afea9c - std::panicking::default_hook::h0dcf88ad4d72ec5e [INFO] [stderr] at /rustc/169954edd744527414c631e9af1bbdc537b0cdf2/library/std/src/panicking.rs:217 [INFO] [stderr] 10: 0x55b779aff393 - std::panicking::rust_panic_with_hook::h81c308f7accbe523 [INFO] [stderr] at /rustc/169954edd744527414c631e9af1bbdc537b0cdf2/library/std/src/panicking.rs:526 [INFO] [stderr] 11: 0x55b779afef8b - rust_begin_unwind [INFO] [stderr] at /rustc/169954edd744527414c631e9af1bbdc537b0cdf2/library/std/src/panicking.rs:437 [INFO] [stderr] 12: 0x55b779afeefb - std::panicking::begin_panic_fmt::h5a4ebf64498a13d8 [INFO] [stderr] at /rustc/169954edd744527414c631e9af1bbdc537b0cdf2/library/std/src/panicking.rs:391 [INFO] [stderr] 13: 0x55b779ae81c6 - build_script_build::main::h84c7fa4f8c6a7801 [INFO] [stderr] at /opt/rustwide/workdir/build.rs:13 [INFO] [stderr] 14: 0x55b779ae7d8b - std::rt::lang_start::{{closure}}::hcbefdc0b2d226206 [INFO] [stderr] at /rustc/169954edd744527414c631e9af1bbdc537b0cdf2/library/std/src/rt.rs:67 [INFO] [stderr] 15: 0x55b779aff7a6 - std::rt::lang_start_internal::{{closure}}::hdb90dc0481c9e8f6 [INFO] [stderr] at /rustc/169954edd744527414c631e9af1bbdc537b0cdf2/library/std/src/rt.rs:52 [INFO] [stderr] 16: 0x55b779aff7a6 - std::panicking::try::do_call::he0af14a67f26ea71 [INFO] [stderr] at /rustc/169954edd744527414c631e9af1bbdc537b0cdf2/library/std/src/panicking.rs:348 [INFO] [stderr] 17: 0x55b779aff7a6 - std::panicking::try::h87d5f0e2c2fee1c5 [INFO] [stderr] at /rustc/169954edd744527414c631e9af1bbdc537b0cdf2/library/std/src/panicking.rs:325 [INFO] [stderr] 18: 0x55b779aff7a6 - std::panic::catch_unwind::he9266eec484f0287 [INFO] [stderr] at /rustc/169954edd744527414c631e9af1bbdc537b0cdf2/library/std/src/panic.rs:394 [INFO] [stderr] 19: 0x55b779aff7a6 - std::rt::lang_start_internal::hb54283a40e32dc37 [INFO] [stderr] at /rustc/169954edd744527414c631e9af1bbdc537b0cdf2/library/std/src/rt.rs:51 [INFO] [stderr] 20: 0x55b779ae7d67 - std::rt::lang_start::hd2589dc287d361ae [INFO] [stderr] at /rustc/169954edd744527414c631e9af1bbdc537b0cdf2/library/std/src/rt.rs:67 [INFO] [stderr] 21: 0x55b779ae829a - main [INFO] [stderr] 22: 0x7f3663fa00b3 - __libc_start_main [INFO] [stderr] 23: 0x55b779ae50ae - _start [INFO] [stderr] 24: 0x0 - [INFO] running `Command { std: "docker" "inspect" "41b092d5c85103472f4e29df67fdc62105ae9d1521e317c555449f4fea99896e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "41b092d5c85103472f4e29df67fdc62105ae9d1521e317c555449f4fea99896e", kill_on_drop: false }` [INFO] [stdout] 41b092d5c85103472f4e29df67fdc62105ae9d1521e317c555449f4fea99896e