[INFO] cloning repository https://github.com/Undin/check-rustc-version [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Undin/check-rustc-version" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FUndin%2Fcheck-rustc-version", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FUndin%2Fcheck-rustc-version'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 654ef80d5b53f30f04d71016277543e87e898ef3 [INFO] checking Undin/check-rustc-version against try#0e1f5e292c80a395d02835ac656d141e992caf89 for pr-145605 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FUndin%2Fcheck-rustc-version" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/Undin/check-rustc-version [INFO] finished tweaking git repo https://github.com/Undin/check-rustc-version [INFO] tweaked toml for git repo https://github.com/Undin/check-rustc-version written to /workspace/builds/worker-0-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/Undin/check-rustc-version on toolchain 0e1f5e292c80a395d02835ac656d141e992caf89 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0e1f5e292c80a395d02835ac656d141e992caf89" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/Undin/check-rustc-version already has a lockfile, it will not be regenerated [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0e1f5e292c80a395d02835ac656d141e992caf89" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+0e1f5e292c80a395d02835ac656d141e992caf89" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 92f0490ec9d37e8455a37ad59f8cc558e6a647396612ef309d6e4c5d3efbb2d5 [INFO] running `Command { std: "docker" "start" "-a" "92f0490ec9d37e8455a37ad59f8cc558e6a647396612ef309d6e4c5d3efbb2d5", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "92f0490ec9d37e8455a37ad59f8cc558e6a647396612ef309d6e4c5d3efbb2d5", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "92f0490ec9d37e8455a37ad59f8cc558e6a647396612ef309d6e4c5d3efbb2d5", kill_on_drop: false }` [INFO] [stdout] 92f0490ec9d37e8455a37ad59f8cc558e6a647396612ef309d6e4c5d3efbb2d5 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "RUSTDOCFLAGS=--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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+0e1f5e292c80a395d02835ac656d141e992caf89" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] ca5568e0313c90a59fab0e634fd0829953269a694404223d355d9281cbf706e3 [INFO] running `Command { std: "docker" "start" "-a" "ca5568e0313c90a59fab0e634fd0829953269a694404223d355d9281cbf706e3", kill_on_drop: false }` [INFO] [stderr] Compiling check-rustc-version v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> build.rs:16:5 [INFO] [stdout] | [INFO] [stdout] 16 | write!(&mut file, "RUSTC: {}\n", env::var_os("RUSTC").unwrap().to_string_lossy()); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 16 | let _ = write!(&mut file, "RUSTC: {}\n", env::var_os("RUSTC").unwrap().to_string_lossy()); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> build.rs:18:5 [INFO] [stdout] | [INFO] [stdout] 18 | write!(&mut file, "rustc --version: {}\n", version); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 18 | let _ = write!(&mut file, "rustc --version: {}\n", version); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: failed to run custom build command for `check-rustc-version v0.1.0 (/opt/rustwide/workdir)` [INFO] [stderr] note: To improve backtraces for build dependencies, set the CARGO_PROFILE_DEV_BUILD_OVERRIDE_DEBUG=true environment variable to enable debug information generation. [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/target/debug/build/check-rustc-version-0768c9295eb3b22d/build-script-build` (exit status: 101) [INFO] [stderr] --- stderr [INFO] [stderr] [INFO] [stderr] thread 'main' (54) panicked at build.rs:15:54: [INFO] [stderr] called `Result::unwrap()` on an `Err` value: Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" } [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x5cc104675b72 - std::backtrace_rs::backtrace::libunwind::trace::h4163c95856e72a09 [INFO] [stderr] at /rustc/0e1f5e292c80a395d02835ac656d141e992caf89/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9 [INFO] [stderr] 1: 0x5cc104675b72 - std::backtrace_rs::backtrace::trace_unsynchronized::h5b694b7a2ef0804f [INFO] [stderr] at /rustc/0e1f5e292c80a395d02835ac656d141e992caf89/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14 [INFO] [stderr] 2: 0x5cc104675b72 - std::sys::backtrace::_print_fmt::h19d613089ce84e62 [INFO] [stderr] at /rustc/0e1f5e292c80a395d02835ac656d141e992caf89/library/std/src/sys/backtrace.rs:66:9 [INFO] [stderr] 3: 0x5cc104675b72 - ::fmt::h3c585d7c62b64901 [INFO] [stderr] at /rustc/0e1f5e292c80a395d02835ac656d141e992caf89/library/std/src/sys/backtrace.rs:39:26 [INFO] [stderr] 4: 0x5cc10469375f - core::fmt::rt::Argument::fmt::ha3dbd27f1c455b06 [INFO] [stderr] at /rustc/0e1f5e292c80a395d02835ac656d141e992caf89/library/core/src/fmt/rt.rs:173:76 [INFO] [stderr] 5: 0x5cc10469375f - core::fmt::write::h9c05a6eac22c3865 [INFO] [stderr] at /rustc/0e1f5e292c80a395d02835ac656d141e992caf89/library/core/src/fmt/mod.rs:1468:25 [INFO] [stderr] 6: 0x5cc1046675c3 - std::io::default_write_fmt::h8538ac85990ad32d [INFO] [stderr] at /rustc/0e1f5e292c80a395d02835ac656d141e992caf89/library/std/src/io/mod.rs:639:11 [INFO] [stderr] 7: 0x5cc1046675c3 - std::io::Write::write_fmt::he21f62cc3e37fa77 [INFO] [stderr] at /rustc/0e1f5e292c80a395d02835ac656d141e992caf89/library/std/src/io/mod.rs:1954:13 [INFO] [stderr] 8: 0x5cc104675f72 - std::sys::backtrace::BacktraceLock::print::h0b6b64cca6fd338b [INFO] [stderr] at /rustc/0e1f5e292c80a395d02835ac656d141e992caf89/library/std/src/sys/backtrace.rs:42:9 [INFO] [stderr] 9: 0x5cc104665ccc - std::panicking::default_hook::{{closure}}::h5eedb6216f96ab7c [INFO] [stderr] at /rustc/0e1f5e292c80a395d02835ac656d141e992caf89/library/std/src/panicking.rs:301:27 [INFO] [stderr] 10: 0x5cc104665b13 - std::panicking::default_hook::h1a7fb5d5dbde74ba [INFO] [stderr] at /rustc/0e1f5e292c80a395d02835ac656d141e992caf89/library/std/src/panicking.rs:328:9 [INFO] [stderr] 11: 0x5cc10466531d - std::panicking::panic_with_hook::h8735c0ac94b8a12a [INFO] [stderr] at /rustc/0e1f5e292c80a395d02835ac656d141e992caf89/library/std/src/panicking.rs:834:13 [INFO] [stderr] 12: 0x5cc104675e9a - std::panicking::panic_handler::{{closure}}::h213654840440c69a [INFO] [stderr] at /rustc/0e1f5e292c80a395d02835ac656d141e992caf89/library/std/src/panicking.rs:707:13 [INFO] [stderr] 13: 0x5cc104675df9 - std::sys::backtrace::__rust_end_short_backtrace::h6e69671836ae008e [INFO] [stderr] at /rustc/0e1f5e292c80a395d02835ac656d141e992caf89/library/std/src/sys/backtrace.rs:174:18 [INFO] [stderr] 14: 0x5cc10466594d - __rustc[3579c1366a1405d8]::rust_begin_unwind [INFO] [stderr] at /rustc/0e1f5e292c80a395d02835ac656d141e992caf89/library/std/src/panicking.rs:698:5 [INFO] [stderr] 15: 0x5cc1046969c0 - core::panicking::panic_fmt::he616454f7df194b0 [INFO] [stderr] at /rustc/0e1f5e292c80a395d02835ac656d141e992caf89/library/core/src/panicking.rs:75:14 [INFO] [stderr] 16: 0x5cc104697296 - core::result::unwrap_failed::h05de9e3e9edab48f [INFO] [stderr] at /rustc/0e1f5e292c80a395d02835ac656d141e992caf89/library/core/src/result.rs:1852:5 [INFO] [stderr] 17: 0x5cc10464b6b9 - build_script_build::extract_rustc_version::hb4a7f8075d07bdde [INFO] [stderr] 18: 0x5cc10464b436 - build_script_build::main::hae5abe8c55b88222 [INFO] [stderr] 19: 0x5cc10464e203 - core::ops::function::FnOnce::call_once::h4cb85bf01308886a [INFO] [stderr] 20: 0x5cc10464b136 - std::sys::backtrace::__rust_begin_short_backtrace::he460e6de861f618e [INFO] [stderr] 21: 0x5cc10464d219 - std::rt::lang_start::{{closure}}::h4d4299fbe830dc5f [INFO] [stderr] 22: 0x5cc104676900 - core::ops::function::impls:: for &F>::call_once::h2096167a4f36f2b4 [INFO] [stderr] at /rustc/0e1f5e292c80a395d02835ac656d141e992caf89/library/core/src/ops/function.rs:290:21 [INFO] [stderr] 23: 0x5cc104676900 - std::panicking::catch_unwind::do_call::h0a7a4ae3aa7bcc82 [INFO] [stderr] at /rustc/0e1f5e292c80a395d02835ac656d141e992caf89/library/std/src/panicking.rs:590:40 [INFO] [stderr] 24: 0x5cc104676900 - std::panicking::catch_unwind::h098f08fe22c8fd26 [INFO] [stderr] at /rustc/0e1f5e292c80a395d02835ac656d141e992caf89/library/std/src/panicking.rs:553:19 [INFO] [stderr] 25: 0x5cc104676900 - std::panic::catch_unwind::h255697f5b5ca30f3 [INFO] [stderr] at /rustc/0e1f5e292c80a395d02835ac656d141e992caf89/library/std/src/panic.rs:359:14 [INFO] [stderr] 26: 0x5cc104676900 - std::rt::lang_start_internal::{{closure}}::h8cabf46c6d1e926d [INFO] [stderr] at /rustc/0e1f5e292c80a395d02835ac656d141e992caf89/library/std/src/rt.rs:175:24 [INFO] [stderr] 27: 0x5cc104676900 - std::panicking::catch_unwind::do_call::h267e1375faa492ee [INFO] [stderr] at /rustc/0e1f5e292c80a395d02835ac656d141e992caf89/library/std/src/panicking.rs:590:40 [INFO] [stderr] 28: 0x5cc104676900 - std::panicking::catch_unwind::hd2217392d8d34112 [INFO] [stderr] at /rustc/0e1f5e292c80a395d02835ac656d141e992caf89/library/std/src/panicking.rs:553:19 [INFO] [stderr] 29: 0x5cc104676900 - std::panic::catch_unwind::h504bbf7cc480b2c9 [INFO] [stderr] at /rustc/0e1f5e292c80a395d02835ac656d141e992caf89/library/std/src/panic.rs:359:14 [INFO] [stderr] 30: 0x5cc104676900 - std::rt::lang_start_internal::h0ee17a682f5aef84 [INFO] [stderr] at /rustc/0e1f5e292c80a395d02835ac656d141e992caf89/library/std/src/rt.rs:171:5 [INFO] [stderr] 31: 0x5cc10464d251 - std::rt::lang_start::h85091563f612f18a [INFO] [stderr] 32: 0x5cc10464f975 - main [INFO] [stderr] 33: 0x7ba6c29c81ca - [INFO] [stderr] 34: 0x7ba6c29c828b - __libc_start_main [INFO] [stderr] 35: 0x5cc10464ab15 - _start [INFO] [stderr] 36: 0x0 - [INFO] running `Command { std: "docker" "inspect" "ca5568e0313c90a59fab0e634fd0829953269a694404223d355d9281cbf706e3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ca5568e0313c90a59fab0e634fd0829953269a694404223d355d9281cbf706e3", kill_on_drop: false }` [INFO] [stdout] ca5568e0313c90a59fab0e634fd0829953269a694404223d355d9281cbf706e3