[INFO] fetching crate unsafe_ls 0.1.0...
[INFO] checking unsafe_ls-0.1.0 against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] extracting crate unsafe_ls 0.1.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate unsafe_ls 0.1.0 on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "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-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: path `/workspace/builds/worker-1/source/src/unsafe_ls.rs` was erroneously implicitly accepted for binary `unsafe_ls`,
[INFO] [stderr] please set bin.path in Cargo.toml
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e9aca93049f036526c9f75dd6eac147d3fa9d9ed2ec8bae818f276ed1bce3575
[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" "e9aca93049f036526c9f75dd6eac147d3fa9d9ed2ec8bae818f276ed1bce3575", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e9aca93049f036526c9f75dd6eac147d3fa9d9ed2ec8bae818f276ed1bce3575", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9aca93049f036526c9f75dd6eac147d3fa9d9ed2ec8bae818f276ed1bce3575", kill_on_drop: false }`
[INFO] [stdout] e9aca93049f036526c9f75dd6eac147d3fa9d9ed2ec8bae818f276ed1bce3575
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c9e585b4fa667885ff4de1447e651d5de24e21ee24c6686a96e32ad28c1b2848
[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" "c9e585b4fa667885ff4de1447e651d5de24e21ee24c6686a96e32ad28c1b2848", 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]     Checking 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: 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] [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] [stderr] error: could not compile `unsafe_ls`
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[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" "c9e585b4fa667885ff4de1447e651d5de24e21ee24c6686a96e32ad28c1b2848", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9e585b4fa667885ff4de1447e651d5de24e21ee24c6686a96e32ad28c1b2848", kill_on_drop: false }`
[INFO] [stdout] c9e585b4fa667885ff4de1447e651d5de24e21ee24c6686a96e32ad28c1b2848