[INFO] fetching crate compiler_builtins 0.1.27...
[INFO] testing compiler_builtins-0.1.27 against try#41997647ba6a77908f6ef64401414feb00bccf16 for pr-71274
[INFO] extracting crate compiler_builtins 0.1.27 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate compiler_builtins 0.1.27 on toolchain 41997647ba6a77908f6ef64401414feb00bccf16
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "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-6/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" "+41997647ba6a77908f6ef64401414feb00bccf16" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+41997647ba6a77908f6ef64401414feb00bccf16" "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] f746c77fd5b5d361a3a5ceb1317bd677139a09703b58e634fac67ab9aacc320b
[INFO] running `"docker" "start" "-a" "f746c77fd5b5d361a3a5ceb1317bd677139a09703b58e634fac67ab9aacc320b"`
[INFO] [stderr]    Compiling compiler_builtins v0.1.27 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.55s
[INFO] running `"docker" "inspect" "f746c77fd5b5d361a3a5ceb1317bd677139a09703b58e634fac67ab9aacc320b"`
[INFO] running `"docker" "rm" "-f" "f746c77fd5b5d361a3a5ceb1317bd677139a09703b58e634fac67ab9aacc320b"`
[INFO] [stdout] f746c77fd5b5d361a3a5ceb1317bd677139a09703b58e634fac67ab9aacc320b
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+41997647ba6a77908f6ef64401414feb00bccf16" "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] f37ef2297e7405fd3e0906d713dd7c49efa7352ea19c062b5e04a7b03d5f0daf
[INFO] running `"docker" "start" "-a" "f37ef2297e7405fd3e0906d713dd7c49efa7352ea19c062b5e04a7b03d5f0daf"`
[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" "f37ef2297e7405fd3e0906d713dd7c49efa7352ea19c062b5e04a7b03d5f0daf"`
[INFO] running `"docker" "rm" "-f" "f37ef2297e7405fd3e0906d713dd7c49efa7352ea19c062b5e04a7b03d5f0daf"`
[INFO] [stdout] f37ef2297e7405fd3e0906d713dd7c49efa7352ea19c062b5e04a7b03d5f0daf