[INFO] updating cached repository https://github.com/nikhilmitrax/python-oxidation
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9b6ef0ddd07e2d18d10b7bde3ea8357ab72ac431
[INFO] checking nikhilmitrax/python-oxidation against master#c9edc02e8320a9e5799d185910ece7d491f524e6 for pr-64398
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnikhilmitrax%2Fpython-oxidation" "work/builds/worker-7/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nikhilmitrax/python-oxidation on toolchain c9edc02e8320a9e5799d185910ece7d491f524e6-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/nikhilmitrax/python-oxidation
[INFO] finished tweaking git repo https://github.com/nikhilmitrax/python-oxidation
[INFO] tweaked toml for git repo https://github.com/nikhilmitrax/python-oxidation written to work/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/nikhilmitrax/python-oxidation already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "+c9edc02e8320a9e5799d185910ece7d491f524e6-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] b52b824faeda464a1128d3cbf5b5c71ae7932cd29c89c5a1bea33677f9117dae
[INFO] running `"docker" "start" "-a" "b52b824faeda464a1128d3cbf5b5c71ae7932cd29c89c5a1bea33677f9117dae"`
[INFO] [stderr]    Compiling aho-corasick v0.6.10
[INFO] [stderr]    Compiling mashup-impl v0.1.9
[INFO] [stderr]    Compiling syn v0.15.26
[INFO] [stderr]    Compiling regex v1.1.0
[INFO] [stderr]     Checking mashup v0.1.9
[INFO] [stderr]    Compiling pyo3 v0.6.0-alpha.2
[INFO] [stderr]    Compiling pyo3-derive-backend v0.6.0-alpha.2
[INFO] [stderr]    Compiling inventory-impl v0.1.3
[INFO] [stderr]    Compiling ghost v0.1.0
[INFO] [stderr]    Compiling ctor v0.1.7
[INFO] [stderr]    Compiling pyo3cls v0.6.0-alpha.2
[INFO] [stderr]     Checking inventory v0.1.3
[INFO] [stderr]     Checking rust_from_py v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]   --> src/lib.rs:27:21
[INFO] [stderr]    |
[INFO] [stderr] 27 | fn test_return_dict(a: std::vec::Vec<i32>) -> PyResult<std::collections::HashMap<i64,i64>> {
[INFO] [stderr]    |                     ^ help: consider prefixing with an underscore: `_a`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]   --> src/lib.rs:27:21
[INFO] [stderr]    |
[INFO] [stderr] 27 | fn test_return_dict(a: std::vec::Vec<i32>) -> PyResult<std::collections::HashMap<i64,i64>> {
[INFO] [stderr]    |                     ^ help: consider prefixing with an underscore: `_a`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 00s
[INFO] running `"docker" "inspect" "b52b824faeda464a1128d3cbf5b5c71ae7932cd29c89c5a1bea33677f9117dae"`
[INFO] running `"docker" "rm" "-f" "b52b824faeda464a1128d3cbf5b5c71ae7932cd29c89c5a1bea33677f9117dae"`
[INFO] [stdout] b52b824faeda464a1128d3cbf5b5c71ae7932cd29c89c5a1bea33677f9117dae