[INFO] crate compiler_builtins 0.1.26 is already in cache [INFO] checking compiler_builtins-0.1.26 against master#3dbade652ed8ebac70f903e01f51cd92c4e4302c for pr-69880 [INFO] extracting crate compiler_builtins 0.1.26 into /workspace/builds/worker-8/source [INFO] validating manifest of crates.io crate compiler_builtins 0.1.26 on toolchain 3dbade652ed8ebac70f903e01f51cd92c4e4302c [INFO] running `"/workspace/cargo-home/bin/cargo" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking crates.io crate compiler_builtins 0.1.26 [INFO] removed 0 missing examples [INFO] finished tweaking crates.io crate compiler_builtins 0.1.26 [INFO] tweaked toml for crates.io crate compiler_builtins 0.1.26 written to /workspace/builds/worker-8/source/Cargo.toml [INFO] crate crates.io crate compiler_builtins 0.1.26 already has a lockfile, it will not be regenerated [INFO] running `"/workspace/cargo-home/bin/cargo" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "check" "--frozen" "--all" "--all-targets"` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 61bb3711cece52d820ce2d683f39ee2cc0b412d45064d316aa9687081e9871bc [INFO] running `"docker" "start" "-a" "61bb3711cece52d820ce2d683f39ee2cc0b412d45064d316aa9687081e9871bc"` [INFO] [stderr] Compiling compiler_builtins v0.1.26 (/opt/rustwide/workdir) [INFO] [stderr] error[E0259]: the name `core` is defined multiple times [INFO] [stderr] --> src/lib.rs:31:1 [INFO] [stderr] | [INFO] [stderr] 31 | extern crate core; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ `core` reimported here [INFO] [stderr] | [INFO] [stderr] = note: `core` must be defined only once in the type namespace of this module [INFO] [stderr] help: you can use `as` to change the binding name of the import [INFO] [stderr] | [INFO] [stderr] 31 | extern crate core as other_core; [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] error: aborting due to previous error [INFO] [stderr] [INFO] [stderr] For more information about this error, try `rustc --explain E0259`. [INFO] [stderr] error: could not compile `compiler_builtins`. [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: build failed [INFO] running `"docker" "inspect" "61bb3711cece52d820ce2d683f39ee2cc0b412d45064d316aa9687081e9871bc"` [INFO] running `"docker" "rm" "-f" "61bb3711cece52d820ce2d683f39ee2cc0b412d45064d316aa9687081e9871bc"` [INFO] [stdout] 61bb3711cece52d820ce2d683f39ee2cc0b412d45064d316aa9687081e9871bc