[INFO] updating cached repository https://github.com/jpastuszek/varnishslog
[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] b54294b3a213ea6c99f8120ffcdf3ae8f509d925
[INFO] checking jpastuszek/varnishslog against try#1a608893c03d7722effeb0058e82770bd36b4b3c for pr-66504-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjpastuszek%2Fvarnishslog" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jpastuszek/varnishslog 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/jpastuszek/varnishslog
[INFO] finished tweaking git repo https://github.com/jpastuszek/varnishslog
[INFO] tweaked toml for git repo https://github.com/jpastuszek/varnishslog written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/jpastuszek/varnishslog 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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 218125abbe225a638fe1c3551a75d94fea21e7c850db4d414fcce0f2b7c30fb6
[INFO] running `"docker" "start" "-a" "218125abbe225a638fe1c3551a75d94fea21e7c850db4d414fcce0f2b7c30fb6"`
[INFO] [stderr]     Checking libc v0.2.14
[INFO] [stderr]    Compiling quote v0.3.3
[INFO] [stderr]     Checking regex-syntax v0.3.4
[INFO] [stderr]     Checking boolinator v0.1.0
[INFO] [stderr]     Checking assert_matches v1.2.0
[INFO] [stderr]     Checking bencher v0.1.1
[INFO] [stderr]    Compiling syntex_pos v0.44.0
[INFO] [stderr]     Checking serde_json v0.8.6
[INFO] [stderr]     Checking num v0.1.35
[INFO] [stderr]    Compiling term v0.4.4
[INFO] [stderr]    Compiling syn v0.9.0
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking time v0.1.35
[INFO] [stderr]     Checking atty v0.2.6
[INFO] [stderr]    Compiling syntex_errors v0.44.0
[INFO] [stderr]     Checking aho-corasick v0.5.2
[INFO] [stderr]     Checking thread_local v0.2.6
[INFO] [stderr]     Checking clap v2.30.0
[INFO] [stderr]     Checking chrono v0.2.25
[INFO] [stderr]    Compiling syntex_syntax v0.44.1
[INFO] [stderr]     Checking regex v0.1.73
[INFO] [stderr]    Compiling serde_codegen_internals v0.10.0
[INFO] [stderr]     Checking flexi_logger v0.5.0
[INFO] [stderr]     Checking env_logger v0.3.5
[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/flexi_logger-0.5.0/src/flexi_writer.rs:135:78
[INFO] [stderr]     |
[INFO] [stderr] 135 |     let mut filename = String::with_capacity(180).add(&s_directory).add("/").add(&progname);
[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 `flexi_logger`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "218125abbe225a638fe1c3551a75d94fea21e7c850db4d414fcce0f2b7c30fb6"`
[INFO] running `"docker" "rm" "-f" "218125abbe225a638fe1c3551a75d94fea21e7c850db4d414fcce0f2b7c30fb6"`
[INFO] [stdout] 218125abbe225a638fe1c3551a75d94fea21e7c850db4d414fcce0f2b7c30fb6