[INFO] crate doc_file 0.2.0 is already in cache
[INFO] checking doc_file-0.2.0 against master#fdc0011561c6365c596dfd8fa1ef388162bc89c7 for pr-66504-1
[INFO] extracting crate doc_file 0.2.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate doc_file 0.2.0 on toolchain fdc0011561c6365c596dfd8fa1ef388162bc89c7
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate doc_file 0.2.0
[INFO] finished tweaking crates.io crate doc_file 0.2.0
[INFO] tweaked toml for crates.io crate doc_file 0.2.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "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" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "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] e88d4030eaba606c1624e086849af9024e94b21defd8c287a267aec2975714c8
[INFO] running `"docker" "start" "-a" "e88d4030eaba606c1624e086849af9024e94b21defd8c287a267aec2975714c8"`
[INFO] [stderr]     Checking doc_file v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: expected identifier, found keyword `mod`
[INFO] [stderr]   --> src/lib.rs:16:15
[INFO] [stderr]    |
[INFO] [stderr] 16 | use std::io::{mod, IoResult};
[INFO] [stderr]    |               ^^^ expected identifier, found keyword
[INFO] [stderr]    |
[INFO] [stderr] help: you can escape reserved keywords to use them as identifiers
[INFO] [stderr]    |
[INFO] [stderr] 16 | use std::io::{r#mod, IoResult};
[INFO] [stderr]    |               ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: expected identifier, found keyword `mod`
[INFO] [stderr]   --> src/lib.rs:16:15
[INFO] [stderr]    |
[INFO] [stderr] 16 | use std::io::{mod, IoResult};
[INFO] [stderr]    |               ^^^ expected identifier, found keyword
[INFO] [stderr]    |
[INFO] [stderr] help: you can escape reserved keywords to use them as identifiers
[INFO] [stderr]    |
[INFO] [stderr] 16 | use std::io::{r#mod, IoResult};
[INFO] [stderr]    |               ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0463]: can't find crate for `rustc`
[INFO] [stderr]  --> src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | extern crate rustc;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stderr] 
[INFO] [stderr] error[E0463]: can't find crate for `rustc`
[INFO] [stderr]  --> src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | extern crate rustc;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0463`.
[INFO] [stderr] For more information about this error, try `rustc --explain E0463`.
[INFO] [stderr] error: could not compile `doc_file`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `doc_file`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "e88d4030eaba606c1624e086849af9024e94b21defd8c287a267aec2975714c8"`
[INFO] running `"docker" "rm" "-f" "e88d4030eaba606c1624e086849af9024e94b21defd8c287a267aec2975714c8"`
[INFO] [stdout] e88d4030eaba606c1624e086849af9024e94b21defd8c287a267aec2975714c8