[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#119d2a1a98fe87d4ae6cabf12134a0ef2fb95851 for pr-75180 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexclear%2Frust-koans-answers" "/workspace/builds/worker-10/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/alexclear/rust-koans-answers on toolchain 119d2a1a98fe87d4ae6cabf12134a0ef2fb95851 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+119d2a1a98fe87d4ae6cabf12134a0ef2fb95851" "read-manifest" "--manifest-path" "Cargo.toml", 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-10/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" "+119d2a1a98fe87d4ae6cabf12134a0ef2fb95851" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+119d2a1a98fe87d4ae6cabf12134a0ef2fb95851" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] c36072c2db54441118e0421b7d8c04a1f93162eed05e8cdd5db347693ccb027c [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" "c36072c2db54441118e0421b7d8c04a1f93162eed05e8cdd5db347693ccb027c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "c36072c2db54441118e0421b7d8c04a1f93162eed05e8cdd5db347693ccb027c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c36072c2db54441118e0421b7d8c04a1f93162eed05e8cdd5db347693ccb027c", kill_on_drop: false }` [INFO] [stdout] c36072c2db54441118e0421b7d8c04a1f93162eed05e8cdd5db347693ccb027c [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+119d2a1a98fe87d4ae6cabf12134a0ef2fb95851" "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] a0d701f4f72b9d503e01c24a14f522c5d1341e8763929e15ac0b9c80eeaa6833 [INFO] running `Command { std: "docker" "start" "-a" "a0d701f4f72b9d503e01c24a14f522c5d1341e8763929e15ac0b9c80eeaa6833", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [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-aacaadd02b453c57/build-script-build` (exit code: 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: 0x5611f667b7af - std::backtrace_rs::backtrace::libunwind::trace::h21c0966c343fddd8 [INFO] [stderr] at /rustc/119d2a1a98fe87d4ae6cabf12134a0ef2fb95851/library/std/src/../../backtrace/src/backtrace/libunwind.rs:96 [INFO] [stderr] 1: 0x5611f667b7af - std::backtrace_rs::backtrace::trace_unsynchronized::h62cde0754779ae3a [INFO] [stderr] at /rustc/119d2a1a98fe87d4ae6cabf12134a0ef2fb95851/library/std/src/../../backtrace/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x5611f667b7af - std::sys_common::backtrace::_print_fmt::hb2d70198918acf1c [INFO] [stderr] at /rustc/119d2a1a98fe87d4ae6cabf12134a0ef2fb95851/library/std/src/sys_common/backtrace.rs:77 [INFO] [stderr] 3: 0x5611f667b7af - ::fmt::h5a9d4ddd4d99b877 [INFO] [stderr] at /rustc/119d2a1a98fe87d4ae6cabf12134a0ef2fb95851/library/std/src/sys_common/backtrace.rs:58 [INFO] [stderr] 4: 0x5611f669540c - core::fmt::write::h3a043650ba7bf668 [INFO] [stderr] at /rustc/119d2a1a98fe87d4ae6cabf12134a0ef2fb95851/library/core/src/fmt/mod.rs:1117 [INFO] [stderr] 5: 0x5611f6679f15 - std::io::Write::write_fmt::h2dbf1bb0d9f42142 [INFO] [stderr] at /rustc/119d2a1a98fe87d4ae6cabf12134a0ef2fb95851/library/std/src/io/mod.rs:1510 [INFO] [stderr] 6: 0x5611f667dcd0 - std::sys_common::backtrace::_print::h1091565a54a3c462 [INFO] [stderr] at /rustc/119d2a1a98fe87d4ae6cabf12134a0ef2fb95851/library/std/src/sys_common/backtrace.rs:61 [INFO] [stderr] 7: 0x5611f667dcd0 - std::sys_common::backtrace::print::hc9759e13a502cda2 [INFO] [stderr] at /rustc/119d2a1a98fe87d4ae6cabf12134a0ef2fb95851/library/std/src/sys_common/backtrace.rs:48 [INFO] [stderr] 8: 0x5611f667dcd0 - std::panicking::default_hook::{{closure}}::hd35b8516a1d88160 [INFO] [stderr] at /rustc/119d2a1a98fe87d4ae6cabf12134a0ef2fb95851/library/std/src/panicking.rs:198 [INFO] [stderr] 9: 0x5611f667da1c - std::panicking::default_hook::h0dcf88ad4d72ec5e [INFO] [stderr] at /rustc/119d2a1a98fe87d4ae6cabf12134a0ef2fb95851/library/std/src/panicking.rs:217 [INFO] [stderr] 10: 0x5611f667e313 - std::panicking::rust_panic_with_hook::h81c308f7accbe523 [INFO] [stderr] at /rustc/119d2a1a98fe87d4ae6cabf12134a0ef2fb95851/library/std/src/panicking.rs:526 [INFO] [stderr] 11: 0x5611f667df0b - rust_begin_unwind [INFO] [stderr] at /rustc/119d2a1a98fe87d4ae6cabf12134a0ef2fb95851/library/std/src/panicking.rs:437 [INFO] [stderr] 12: 0x5611f6694811 - core::panicking::panic_fmt::h019ad16a92ccd092 [INFO] [stderr] at /rustc/119d2a1a98fe87d4ae6cabf12134a0ef2fb95851/library/core/src/panicking.rs:85 [INFO] [stderr] 13: 0x5611f6694633 - core::option::expect_none_failed::h7135ba2fdb185931 [INFO] [stderr] at /rustc/119d2a1a98fe87d4ae6cabf12134a0ef2fb95851/library/core/src/option.rs:1274 [INFO] [stderr] 14: 0x5611f66693cb - core::result::Result::unwrap::h4ec7e546a2a3bed4 [INFO] [stderr] at /rustc/119d2a1a98fe87d4ae6cabf12134a0ef2fb95851/library/core/src/result.rs:1005 [INFO] [stderr] 15: 0x5611f6669c2b - build_script_build::main::h7b22f25aafeebb1d [INFO] [stderr] at /opt/rustwide/workdir/build.rs:4 [INFO] [stderr] 16: 0x5611f666925b - std::rt::lang_start::{{closure}}::hb7e1d9a67e67a1ba [INFO] [stderr] at /rustc/119d2a1a98fe87d4ae6cabf12134a0ef2fb95851/library/std/src/rt.rs:67 [INFO] [stderr] 17: 0x5611f667e726 - std::rt::lang_start_internal::{{closure}}::hdb90dc0481c9e8f6 [INFO] [stderr] at /rustc/119d2a1a98fe87d4ae6cabf12134a0ef2fb95851/library/std/src/rt.rs:52 [INFO] [stderr] 18: 0x5611f667e726 - std::panicking::try::do_call::he0af14a67f26ea71 [INFO] [stderr] at /rustc/119d2a1a98fe87d4ae6cabf12134a0ef2fb95851/library/std/src/panicking.rs:348 [INFO] [stderr] 19: 0x5611f667e726 - std::panicking::try::h87d5f0e2c2fee1c5 [INFO] [stderr] at /rustc/119d2a1a98fe87d4ae6cabf12134a0ef2fb95851/library/std/src/panicking.rs:325 [INFO] [stderr] 20: 0x5611f667e726 - std::panic::catch_unwind::he9266eec484f0287 [INFO] [stderr] at /rustc/119d2a1a98fe87d4ae6cabf12134a0ef2fb95851/library/std/src/panic.rs:394 [INFO] [stderr] 21: 0x5611f667e726 - std::rt::lang_start_internal::hb54283a40e32dc37 [INFO] [stderr] at /rustc/119d2a1a98fe87d4ae6cabf12134a0ef2fb95851/library/std/src/rt.rs:51 [INFO] [stderr] 22: 0x5611f6669237 - std::rt::lang_start::h2a89fa2793f7ccc8 [INFO] [stderr] at /rustc/119d2a1a98fe87d4ae6cabf12134a0ef2fb95851/library/std/src/rt.rs:67 [INFO] [stderr] 23: 0x5611f6669c6a - main [INFO] [stderr] 24: 0x7f8da7d6c0b3 - __libc_start_main [INFO] [stderr] 25: 0x5611f666909e - _start [INFO] [stderr] 26: 0x0 - [INFO] running `Command { std: "docker" "inspect" "a0d701f4f72b9d503e01c24a14f522c5d1341e8763929e15ac0b9c80eeaa6833", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "a0d701f4f72b9d503e01c24a14f522c5d1341e8763929e15ac0b9c80eeaa6833", kill_on_drop: false }` [INFO] [stdout] a0d701f4f72b9d503e01c24a14f522c5d1341e8763929e15ac0b9c80eeaa6833