[INFO] fetching crate compiler_builtins 0.1.38... [INFO] checking compiler_builtins-0.1.38 against master#2ad5292aea6328113b55968b4322528d48261316 for pr-80243 [INFO] extracting crate compiler_builtins 0.1.38 into /workspace/builds/worker-8/source [INFO] validating manifest of crates.io crate compiler_builtins 0.1.38 on toolchain 2ad5292aea6328113b55968b4322528d48261316 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2ad5292aea6328113b55968b4322528d48261316" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking crates.io crate compiler_builtins 0.1.38 [INFO] removed 0 missing examples [INFO] finished tweaking crates.io crate compiler_builtins 0.1.38 [INFO] tweaked toml for crates.io crate compiler_builtins 0.1.38 written to /workspace/builds/worker-8/source/Cargo.toml [INFO] crate crates.io crate compiler_builtins 0.1.38 already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2ad5292aea6328113b55968b4322528d48261316" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "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" "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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+2ad5292aea6328113b55968b4322528d48261316" "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] 4e37ac45209a24669a8cb9c71218e035434bd3d44917992d23cf5118e699b1fe [INFO] running `Command { std: "docker" "start" "-a" "4e37ac45209a24669a8cb9c71218e035434bd3d44917992d23cf5118e699b1fe", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "4e37ac45209a24669a8cb9c71218e035434bd3d44917992d23cf5118e699b1fe", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "4e37ac45209a24669a8cb9c71218e035434bd3d44917992d23cf5118e699b1fe", kill_on_drop: false }` [INFO] [stdout] 4e37ac45209a24669a8cb9c71218e035434bd3d44917992d23cf5118e699b1fe [INFO] running `Command { std: "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" "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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+2ad5292aea6328113b55968b4322528d48261316" "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] 52f2cfdca75c2dd5c1234cdcbc250a37038cabc43680295e5443d077efab6b9d [INFO] running `Command { std: "docker" "start" "-a" "52f2cfdca75c2dd5c1234cdcbc250a37038cabc43680295e5443d077efab6b9d", kill_on_drop: false }` [INFO] [stderr] Compiling compiler_builtins v0.1.38 (/opt/rustwide/workdir) [INFO] [stdout] error[E0259]: the name `core` is defined multiple times [INFO] [stdout] --> src/lib.rs:32:1 [INFO] [stdout] | [INFO] [stdout] 32 | extern crate core; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ `core` reimported here [INFO] [stdout] | [INFO] [stdout] = note: `core` must be defined only once in the type namespace of this module [INFO] [stdout] help: you can use `as` to change the binding name of the import [INFO] [stdout] | [INFO] [stdout] 32 | extern crate core as other_core; [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to previous error [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0259`. [INFO] [stdout] [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 `Command { std: "docker" "inspect" "52f2cfdca75c2dd5c1234cdcbc250a37038cabc43680295e5443d077efab6b9d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "52f2cfdca75c2dd5c1234cdcbc250a37038cabc43680295e5443d077efab6b9d", kill_on_drop: false }` [INFO] [stdout] 52f2cfdca75c2dd5c1234cdcbc250a37038cabc43680295e5443d077efab6b9d