[INFO] fetching crate compiler_builtins 0.1.27...
[INFO] testing compiler_builtins-0.1.27 against master#28742a1146f10a4f09369baad027a464acb7a766 for pr-71274
[INFO] extracting crate compiler_builtins 0.1.27 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate compiler_builtins 0.1.27 on toolchain 28742a1146f10a4f09369baad027a464acb7a766
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate compiler_builtins 0.1.27
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate compiler_builtins 0.1.27
[INFO] tweaked toml for crates.io crate compiler_builtins 0.1.27 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate compiler_builtins 0.1.27 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "/opt/rustwide/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6f992ea8f9fa62540eaa5dcf8897469d6ef9100393b5f93d90efa30911baec28
[INFO] running `"docker" "start" "-a" "6f992ea8f9fa62540eaa5dcf8897469d6ef9100393b5f93d90efa30911baec28"`
[INFO] [stderr]    Compiling compiler_builtins v0.1.27 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.73s
[INFO] running `"docker" "inspect" "6f992ea8f9fa62540eaa5dcf8897469d6ef9100393b5f93d90efa30911baec28"`
[INFO] running `"docker" "rm" "-f" "6f992ea8f9fa62540eaa5dcf8897469d6ef9100393b5f93d90efa30911baec28"`
[INFO] [stdout] 6f992ea8f9fa62540eaa5dcf8897469d6ef9100393b5f93d90efa30911baec28
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "/opt/rustwide/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9400a647349b0bf0fbaa99ee8a7ac9e7a4386c3321dd81755f5336cb6d09d48d
[INFO] running `"docker" "start" "-a" "9400a647349b0bf0fbaa99ee8a7ac9e7a4386c3321dd81755f5336cb6d09d48d"`
[INFO] [stderr]    Compiling compiler_builtins v0.1.27 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0463]: can't find crate for `panic_handler`
[INFO] [stderr]   --> examples/intrinsics.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | extern crate panic_handler;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0463`.
[INFO] [stderr] error: could not compile `compiler_builtins`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "9400a647349b0bf0fbaa99ee8a7ac9e7a4386c3321dd81755f5336cb6d09d48d"`
[INFO] running `"docker" "rm" "-f" "9400a647349b0bf0fbaa99ee8a7ac9e7a4386c3321dd81755f5336cb6d09d48d"`
[INFO] [stdout] 9400a647349b0bf0fbaa99ee8a7ac9e7a4386c3321dd81755f5336cb6d09d48d