[INFO] updating cached repository https://github.com/brandur/middleware-rust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/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] 14706c69f8c99369ed85d1105df8ebc42c85fa8b
[INFO] checking brandur/middleware-rust against try#1a608893c03d7722effeb0058e82770bd36b4b3c for pr-66504-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrandur%2Fmiddleware-rust" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/brandur/middleware-rust on toolchain 1a608893c03d7722effeb0058e82770bd36b4b3c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/brandur/middleware-rust
[INFO] finished tweaking git repo https://github.com/brandur/middleware-rust
[INFO] tweaked toml for git repo https://github.com/brandur/middleware-rust written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/brandur/middleware-rust already has a lockfile, it will not be regenerated
[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] a8c0f7396f5f5f7cc5bc557ddfd3040795ddb30a0d1968428979a2537c799750
[INFO] running `"docker" "start" "-a" "a8c0f7396f5f5f7cc5bc557ddfd3040795ddb30a0d1968428979a2537c799750"`
[INFO] [stderr]    Compiling libc v0.2.37
[INFO] [stderr]    Compiling rustc-demangle v0.1.7
[INFO] [stderr]    Compiling serde v1.0.27
[INFO] [stderr]    Compiling num-traits v0.2.1
[INFO] [stderr]    Compiling bytecount v0.2.0
[INFO] [stderr]     Checking slog v2.1.1
[INFO] [stderr]     Checking crossbeam v0.3.0
[INFO] [stderr]     Checking sha1 v0.4.0
[INFO] [stderr]     Checking take_mut v0.2.0
[INFO] [stderr]     Checking termcolor v0.3.5
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking isatty v0.1.6
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking net2 v0.2.32
[INFO] [stderr]    Compiling brotli-sys v0.3.2
[INFO] [stderr]    Compiling miniz-sys v0.1.10
[INFO] [stderr]    Compiling actix_derive v0.1.1
[INFO] [stderr]     Checking bytes v0.4.6
[INFO] [stderr]     Checking aho-corasick v0.6.4
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.0
[INFO] [stderr]    Compiling pulldown-cmark v0.1.2
[INFO] [stderr]     Checking uuid v0.5.1
[INFO] [stderr]    Compiling synstructure v0.6.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]     Checking mio v0.6.13
[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/pulldown-cmark-0.1.2/src/utils.rs:51:30
[INFO] [stderr]    |
[INFO] [stderr] 51 |         Owned(a.into_owned() + &b)
[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 `pulldown-cmark`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "a8c0f7396f5f5f7cc5bc557ddfd3040795ddb30a0d1968428979a2537c799750"`
[INFO] running `"docker" "rm" "-f" "a8c0f7396f5f5f7cc5bc557ddfd3040795ddb30a0d1968428979a2537c799750"`
[INFO] [stdout] a8c0f7396f5f5f7cc5bc557ddfd3040795ddb30a0d1968428979a2537c799750