[INFO] crate unsafe_ls 0.1.0 is already in cache
[INFO] testing unsafe_ls-0.1.0 against try#03a1ea71b075ab964b5278bc6e74cd6c52c36ee0 for pr-74409
[INFO] extracting crate unsafe_ls 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate unsafe_ls 0.1.0 on toolchain 03a1ea71b075ab964b5278bc6e74cd6c52c36ee0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate unsafe_ls 0.1.0
[INFO] finished tweaking crates.io crate unsafe_ls 0.1.0
[INFO] tweaked toml for crates.io crate unsafe_ls 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: path `/workspace/builds/worker-4/source/src/unsafe_ls.rs` was erroneously implicitly accepted for binary `unsafe_ls`,
[INFO] [stderr] please set bin.path in Cargo.toml
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e02c9919906484b1057b14d82737804b16822dbc7e5586b39c4e4e092ae1c123
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e02c9919906484b1057b14d82737804b16822dbc7e5586b39c4e4e092ae1c123", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e02c9919906484b1057b14d82737804b16822dbc7e5586b39c4e4e092ae1c123", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e02c9919906484b1057b14d82737804b16822dbc7e5586b39c4e4e092ae1c123", kill_on_drop: false }`
[INFO] [stdout] e02c9919906484b1057b14d82737804b16822dbc7e5586b39c4e4e092ae1c123
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "build" "--frozen" "--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] 4db0d419d86fe05467f220c260287b5a3a49105d57c3cb5120366279557e46e3
[INFO] running `Command { std: "docker" "start" "-a" "4db0d419d86fe05467f220c260287b5a3a49105d57c3cb5120366279557e46e3", kill_on_drop: false }`
[INFO] [stderr] warning: path `/opt/rustwide/workdir/src/unsafe_ls.rs` was erroneously implicitly accepted for binary `unsafe_ls`,
[INFO] [stderr] please set bin.path in Cargo.toml
[INFO] [stderr]    Compiling unsafe_ls v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: expected identifier, found keyword `mod`
[INFO] [stdout]   --> src/unsafe_ls.rs:14:22
[INFO] [stdout]    |
[INFO] [stdout] 14 | use rustc::session::{mod, config};
[INFO] [stdout]    |                      ^^^ expected identifier, found keyword
[INFO] [stdout]    |
[INFO] [stdout] help: you can escape reserved keywords to use them as identifiers
[INFO] [stdout]    |
[INFO] [stdout] 14 | use rustc::session::{r#mod, config};
[INFO] [stdout]    |                      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected type, found `|`
[INFO] [stdout]    --> src/unsafe_ls.rs:151:47
[INFO] [stdout]     |
[INFO] [stdout] 151 | fn get_ast<T>(path: Path, libs: Vec<Path>, f: |ty::ctxt| -> T) -> T {
[INFO] [stdout]     |                                               ^ expected type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `arena`
[INFO] [stdout]  --> src/unsafe_ls.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | extern crate arena;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `unsafe_ls`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "4db0d419d86fe05467f220c260287b5a3a49105d57c3cb5120366279557e46e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4db0d419d86fe05467f220c260287b5a3a49105d57c3cb5120366279557e46e3", kill_on_drop: false }`
[INFO] [stdout] 4db0d419d86fe05467f220c260287b5a3a49105d57c3cb5120366279557e46e3