[INFO] crate du-dust 0.4.1 is already in cache
[INFO] checking du-dust-0.4.1 against try#1a608893c03d7722effeb0058e82770bd36b4b3c for pr-66504-1
[INFO] extracting crate du-dust 0.4.1 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate du-dust 0.4.1 on toolchain 1a608893c03d7722effeb0058e82770bd36b4b3c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate du-dust 0.4.1
[INFO] finished tweaking crates.io crate du-dust 0.4.1
[INFO] tweaked toml for crates.io crate du-dust 0.4.1 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate du-dust 0.4.1 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-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] e7dbd0bec7f8ff69bb1577dba53f8203adbad750cf7d27f44bcfc8bc55420c51
[INFO] running `"docker" "start" "-a" "e7dbd0bec7f8ff69bb1577dba53f8203adbad750cf7d27f44bcfc8bc55420c51"`
[INFO] [stderr]    Compiling syn v1.0.7
[INFO] [stderr]    Compiling winapi v0.3.8
[INFO] [stderr]    Compiling remove_dir_all v0.5.2
[INFO] [stderr]    Compiling bytecount v0.4.0
[INFO] [stderr]     Checking environment v0.1.1
[INFO] [stderr]     Checking difference v1.0.0
[INFO] [stderr]    Compiling serde v1.0.102
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling pulldown-cmark v0.2.0
[INFO] [stderr]    Compiling backtrace v0.3.40
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking error-chain v0.11.0
[INFO] [stderr]     Checking cgmath v0.16.1
[INFO] [stderr]     Checking tempfile v3.1.0
[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-0.2.0/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" "e7dbd0bec7f8ff69bb1577dba53f8203adbad750cf7d27f44bcfc8bc55420c51"`
[INFO] running `"docker" "rm" "-f" "e7dbd0bec7f8ff69bb1577dba53f8203adbad750cf7d27f44bcfc8bc55420c51"`
[INFO] [stdout] e7dbd0bec7f8ff69bb1577dba53f8203adbad750cf7d27f44bcfc8bc55420c51