[INFO] crate ag 0.12.0 is already in cache
[INFO] checking ag-0.12.0 against try#1a608893c03d7722effeb0058e82770bd36b4b3c for pr-66504-1
[INFO] extracting crate ag 0.12.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate ag 0.12.0 on toolchain 1a608893c03d7722effeb0058e82770bd36b4b3c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate ag 0.12.0
[INFO] finished tweaking crates.io crate ag 0.12.0
[INFO] tweaked toml for crates.io crate ag 0.12.0 written to /workspace/builds/worker-2/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] [stdout] 5fb87affbb22f3209eec5fcbf95793993df6fa11cd2cc23e2701f01a06f430ab
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "5fb87affbb22f3209eec5fcbf95793993df6fa11cd2cc23e2701f01a06f430ab"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking remove_dir_all v0.5.2
[INFO] [stderr]     Checking termcolor v1.0.5
[INFO] [stderr]     Checking podio v0.1.6
[INFO] [stderr]     Checking semver-parser v0.7.0
[INFO] [stderr]     Checking bytecount v0.3.2
[INFO] [stderr]     Checking termcolor v0.3.6
[INFO] [stderr]     Checking strfmt v0.1.6
[INFO] [stderr]    Compiling pulldown-cmark v0.2.0
[INFO] [stderr]     Checking quantiles v0.7.1
[INFO] [stderr]     Checking logfmt v0.0.2
[INFO] [stderr]     Checking environment v0.1.1
[INFO] [stderr]     Checking maplit v1.0.2
[INFO] [stderr]    Compiling bzip2-sys v0.1.7
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]     Checking annotate-snippets v0.5.0
[INFO] [stderr]     Checking crossbeam-channel v0.3.9
[INFO] [stderr]     Checking xattr v0.2.2
[INFO] [stderr]     Checking terminal_size v0.1.8
[INFO] [stderr]    Compiling im v13.0.0
[INFO] [stderr]     Checking want v0.2.0
[INFO] [stderr]     Checking bstr v0.2.8
[INFO] [stderr]     Checking sized-chunks v0.3.1
[INFO] [stderr]     Checking pbr v1.0.2
[INFO] [stderr]     Checking colored v1.9.0
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking uuid v0.6.5
[INFO] [stderr]     Checking semver v0.9.0
[INFO] [stderr]     Checking tokio-io v0.1.12
[INFO] [stderr]     Checking hyper-old-types v0.11.0
[INFO] [stderr]     Checking os_type v2.2.0
[INFO] [stderr]     Checking native-tls v0.2.3
[INFO] [stderr]    Compiling structopt-derive v0.2.18
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]     Checking tar v0.4.26
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]     Checking cookie_store v0.7.0
[INFO] [stderr]     Checking exitfailure v0.5.1
[INFO] [stderr]     Checking human-panic v1.0.1
[INFO] [stderr]     Checking assert_cli v0.6.3
[INFO] [stderr]     Checking rayon v1.2.1
[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" "5fb87affbb22f3209eec5fcbf95793993df6fa11cd2cc23e2701f01a06f430ab"`
[INFO] running `"docker" "rm" "-f" "5fb87affbb22f3209eec5fcbf95793993df6fa11cd2cc23e2701f01a06f430ab"`
[INFO] [stdout] 5fb87affbb22f3209eec5fcbf95793993df6fa11cd2cc23e2701f01a06f430ab