[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#5e3f1b148db5bfa27fee52464ae1f5d34c49d77b for pr-75502 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexclear%2Frust-koans-answers" "/workspace/builds/worker-0/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/alexclear/rust-koans-answers on toolchain 5e3f1b148db5bfa27fee52464ae1f5d34c49d77b [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "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-0/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" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "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] 757d71afd7dbee9091fd28b346444e8b34af61e321717073dee6967bb5c2ff8e [INFO] running `Command { std: "docker" "start" "-a" "757d71afd7dbee9091fd28b346444e8b34af61e321717073dee6967bb5c2ff8e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "757d71afd7dbee9091fd28b346444e8b34af61e321717073dee6967bb5c2ff8e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "757d71afd7dbee9091fd28b346444e8b34af61e321717073dee6967bb5c2ff8e", kill_on_drop: false }` [INFO] [stdout] 757d71afd7dbee9091fd28b346444e8b34af61e321717073dee6967bb5c2ff8e [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "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] 004413d33ab1b084055085ae224d553f2d5960e9c97398972c6a1ed75a843701 [INFO] running `Command { std: "docker" "start" "-a" "004413d33ab1b084055085ae224d553f2d5960e9c97398972c6a1ed75a843701", 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-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: 0x557674395aa0 - std::backtrace_rs::backtrace::libunwind::trace::ha1eabb142084ea37 [INFO] [stderr] at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/../../backtrace/src/backtrace/libunwind.rs:96 [INFO] [stderr] 1: 0x557674395aa0 - std::backtrace_rs::backtrace::trace_unsynchronized::hbb8825661d997281 [INFO] [stderr] at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/../../backtrace/src/backtrace/mod.rs:66 [INFO] [stderr] 2: 0x557674395aa0 - std::sys_common::backtrace::_print_fmt::h26d850e2f7183914 [INFO] [stderr] at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/sys_common/backtrace.rs:79 [INFO] [stderr] 3: 0x557674395aa0 - ::fmt::h3834b06f68a2b012 [INFO] [stderr] at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/sys_common/backtrace.rs:58 [INFO] [stderr] 4: 0x5576743aeefc - core::fmt::write::h3a043650ba7bf668 [INFO] [stderr] at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/core/src/fmt/mod.rs:1117 [INFO] [stderr] 5: 0x5576743943d5 - std::io::Write::write_fmt::h9c0c8944a1898139 [INFO] [stderr] at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/io/mod.rs:1510 [INFO] [stderr] 6: 0x557674397c20 - std::sys_common::backtrace::_print::h693c0c2cc41d4d10 [INFO] [stderr] at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/sys_common/backtrace.rs:61 [INFO] [stderr] 7: 0x557674397c20 - std::sys_common::backtrace::print::h213be73e5670b8ea [INFO] [stderr] at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/sys_common/backtrace.rs:48 [INFO] [stderr] 8: 0x557674397c20 - std::panicking::default_hook::{{closure}}::h2d49a3361cc4e7ea [INFO] [stderr] at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/panicking.rs:200 [INFO] [stderr] 9: 0x55767439796c - std::panicking::default_hook::hd41fbdeba93207ba [INFO] [stderr] at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/panicking.rs:219 [INFO] [stderr] 10: 0x557674398283 - std::panicking::rust_panic_with_hook::hcab398664b4bd473 [INFO] [stderr] at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/panicking.rs:569 [INFO] [stderr] 11: 0x557674397e59 - std::panicking::begin_panic_handler::{{closure}}::h7512c6f2998ba93d [INFO] [stderr] at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/panicking.rs:476 [INFO] [stderr] 12: 0x557674395f0c - std::sys_common::backtrace::__rust_end_short_backtrace::h1a25d7e7e1864d3d [INFO] [stderr] at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/sys_common/backtrace.rs:153 [INFO] [stderr] 13: 0x557674397e19 - rust_begin_unwind [INFO] [stderr] at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/panicking.rs:475 [INFO] [stderr] 14: 0x5576743ae301 - core::panicking::panic_fmt::h019ad16a92ccd092 [INFO] [stderr] at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/core/src/panicking.rs:85 [INFO] [stderr] 15: 0x5576743ae123 - core::option::expect_none_failed::h7135ba2fdb185931 [INFO] [stderr] at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/core/src/option.rs:1274 [INFO] [stderr] 16: 0x557674383b0b - core::result::Result::unwrap::h05b341af456d8392 [INFO] [stderr] at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/core/src/result.rs:1005 [INFO] [stderr] 17: 0x55767438399b - build_script_build::main::h7b22f25aafeebb1d [INFO] [stderr] at /opt/rustwide/workdir/build.rs:4 [INFO] [stderr] 18: 0x5576743836ab - core::ops::function::FnOnce::call_once::h33e976c6c58d3cf6 [INFO] [stderr] at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/core/src/ops/function.rs:233 [INFO] [stderr] 19: 0x55767438359e - std::sys_common::backtrace::__rust_begin_short_backtrace::h59a2aef48f1735bd [INFO] [stderr] at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/sys_common/backtrace.rs:137 [INFO] [stderr] 20: 0x557674383911 - std::rt::lang_start::{{closure}}::h18a077dbd54e6af3 [INFO] [stderr] at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/rt.rs:66 [INFO] [stderr] 21: 0x557674398692 - core::ops::function::impls:: for &F>::call_once::hde9814ae740a85dc [INFO] [stderr] at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/core/src/ops/function.rs:265 [INFO] [stderr] 22: 0x557674398692 - std::panicking::try::do_call::h3026bab8cd7540d7 [INFO] [stderr] at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/panicking.rs:373 [INFO] [stderr] 23: 0x557674398692 - std::panicking::try::h852bb5e5a66f7f84 [INFO] [stderr] at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/panicking.rs:337 [INFO] [stderr] 24: 0x557674398692 - std::panic::catch_unwind::hfeb0f3dddf7c6a72 [INFO] [stderr] at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/panic.rs:394 [INFO] [stderr] 25: 0x557674398692 - std::rt::lang_start_internal::h32f0ac6e87476559 [INFO] [stderr] at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/rt.rs:51 [INFO] [stderr] 26: 0x5576743838e7 - std::rt::lang_start::hdfd96fdc7a231a7b [INFO] [stderr] at /rustc/5e3f1b148db5bfa27fee52464ae1f5d34c49d77b/library/std/src/rt.rs:65 [INFO] [stderr] 27: 0x5576743839da - main [INFO] [stderr] 28: 0x7ff72d7840b3 - __libc_start_main [INFO] [stderr] 29: 0x55767438309e - _start [INFO] [stderr] 30: 0x0 - [INFO] running `Command { std: "docker" "inspect" "004413d33ab1b084055085ae224d553f2d5960e9c97398972c6a1ed75a843701", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "004413d33ab1b084055085ae224d553f2d5960e9c97398972c6a1ed75a843701", kill_on_drop: false }` [INFO] [stdout] 004413d33ab1b084055085ae224d553f2d5960e9c97398972c6a1ed75a843701