[INFO] crate pfmt 0.4.0 is already in cache
[INFO] checking pfmt-0.4.0 against try#1a608893c03d7722effeb0058e82770bd36b4b3c for pr-66504-1
[INFO] extracting crate pfmt 0.4.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate pfmt 0.4.0 on toolchain 1a608893c03d7722effeb0058e82770bd36b4b3c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate pfmt 0.4.0
[INFO] finished tweaking crates.io crate pfmt 0.4.0
[INFO] tweaked toml for crates.io crate pfmt 0.4.0 written to /workspace/builds/worker-4/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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 9e12d2986277ef7ff8aa882ca3031d29bf55b47fbb9e6118208a285baf3069ea
[INFO] running `"docker" "start" "-a" "9e12d2986277ef7ff8aa882ca3031d29bf55b47fbb9e6118208a285baf3069ea"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking galvanic-test v0.1.5
[INFO] [stderr]     Checking galvanic-assert v0.8.7
[INFO] [stderr]     Checking pfmt v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0277]: cannot add `&mut std::string::String` to `std::string::String`
[INFO] [stderr]   --> src/util.rs:62:34
[INFO] [stderr]    |
[INFO] [stderr] 62 |                     *s = leftstr + s + &rightstr;
[INFO] [stderr]    |                                  ^ no implementation for `std::string::String + &mut std::string::String`
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::ops::Add<&mut std::string::String>` is not implemented for `std::string::String`
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: cannot add `&mut std::string::String` to `std::string::String`
[INFO] [stderr]   --> src/util.rs:66:34
[INFO] [stderr]    |
[INFO] [stderr] 66 |                     *s = padding + s;
[INFO] [stderr]    |                                  ^ no implementation for `std::string::String + &mut std::string::String`
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::ops::Add<&mut std::string::String>` is not implemented for `std::string::String`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0277`.
[INFO] [stderr] error: could not compile `pfmt`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "9e12d2986277ef7ff8aa882ca3031d29bf55b47fbb9e6118208a285baf3069ea"`
[INFO] running `"docker" "rm" "-f" "9e12d2986277ef7ff8aa882ca3031d29bf55b47fbb9e6118208a285baf3069ea"`
[INFO] [stdout] 9e12d2986277ef7ff8aa882ca3031d29bf55b47fbb9e6118208a285baf3069ea