[INFO] crate mailmodel 0.1.5 is already in cache
[INFO] checking mailmodel-0.1.5 against try#1a608893c03d7722effeb0058e82770bd36b4b3c for pr-66504-1
[INFO] extracting crate mailmodel 0.1.5 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate mailmodel 0.1.5 on toolchain 1a608893c03d7722effeb0058e82770bd36b4b3c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate mailmodel 0.1.5
[INFO] finished tweaking crates.io crate mailmodel 0.1.5
[INFO] tweaked toml for crates.io crate mailmodel 0.1.5 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "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] 64e204f36cf94339a4c499104123edc79b7b14009a9d01c367abb4501af016ac
[INFO] running `"docker" "start" "-a" "64e204f36cf94339a4c499104123edc79b7b14009a9d01c367abb4501af016ac"`
[INFO] [stderr]    Compiling num_cpus v1.11.1
[INFO] [stderr]    Compiling jobserver v0.1.17
[INFO] [stderr]     Checking memchr v1.0.2
[INFO] [stderr]    Compiling serde-xml-rs v0.2.1
[INFO] [stderr]     Checking rayon-core v1.6.1
[INFO] [stderr]     Checking nom v3.2.1
[INFO] [stderr]    Compiling cc v1.0.48
[INFO] [stderr]     Checking rayon v1.2.1
[INFO] [stderr]    Compiling rust_qt_binding_generator v0.2.2
[INFO] [stderr]     Checking imap-proto v0.4.1
[INFO] [stderr]    Compiling openssl-sys v0.9.53
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr] error[E0277]: cannot add `&std::borrow::Cow<'_, str>` to `std::string::String`
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rust_qt_binding_generator-0.2.2/src/util.rs:18:28
[INFO] [stderr]    |
[INFO] [stderr] 18 |     (name[..1].to_string() + &re.replace_all(&name[1..], "_$1")).to_lowercase()
[INFO] [stderr]    |                            ^ no implementation for `std::string::String + &std::borrow::Cow<'_, str>`
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::ops::Add<&std::borrow::Cow<'_, str>>` is not implemented for `std::string::String`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0277`.
[INFO] [stderr] error: could not compile `rust_qt_binding_generator`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "64e204f36cf94339a4c499104123edc79b7b14009a9d01c367abb4501af016ac"`
[INFO] running `"docker" "rm" "-f" "64e204f36cf94339a4c499104123edc79b7b14009a9d01c367abb4501af016ac"`
[INFO] [stdout] 64e204f36cf94339a4c499104123edc79b7b14009a9d01c367abb4501af016ac