[INFO] updating cached repository https://github.com/CosineP/madlibs
[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] c43000cf22ae26eeca6efb4f2d5502706dafc483
[INFO] checking CosineP/madlibs against try#1a608893c03d7722effeb0058e82770bd36b4b3c for pr-66504-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCosineP%2Fmadlibs" "/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/CosineP/madlibs 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/CosineP/madlibs
[INFO] finished tweaking git repo https://github.com/CosineP/madlibs
[INFO] tweaked toml for git repo https://github.com/CosineP/madlibs written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/CosineP/madlibs already has a lockfile, it will not be regenerated
[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-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] 25434ac34d88d4e6b155b3f97528a466bea9055148f5cb4f7e48f7a27f91522a
[INFO] running `"docker" "start" "-a" "25434ac34d88d4e6b155b3f97528a466bea9055148f5cb4f7e48f7a27f91522a"`
[INFO] [stderr]    Compiling serde v1.0.79
[INFO] [stderr]    Compiling rand_core v0.2.1
[INFO] [stderr]    Compiling rustc-demangle v0.1.9
[INFO] [stderr]    Compiling itoa v0.4.3
[INFO] [stderr]    Compiling httparse v1.3.2
[INFO] [stderr]    Compiling same-file v1.0.3
[INFO] [stderr]    Compiling bytecount v0.3.2
[INFO] [stderr]    Compiling rustmorpha v0.1.0 (https://github.com/jfschaefer/rust-morpha.git#47b5a3e5)
[INFO] [stderr]    Compiling rust-senna v0.0.1 (https://github.com/jfschaefer/rust-senna.git#ff14b50b)
[INFO] [stderr]     Checking unidecode v0.2.0
[INFO] [stderr]     Checking doc-comment v0.1.2
[INFO] [stderr]     Checking tap-reader v1.0.1
[INFO] [stderr]     Checking gnuplot v0.0.21
[INFO] [stderr]     Checking nlp-annotations v0.1.2
[INFO] [stderr]    Compiling unicase v2.1.0
[INFO] [stderr]    Compiling rand v0.4.3
[INFO] [stderr]     Checking relay v0.1.1
[INFO] [stderr]     Checking tokio-service v0.1.0
[INFO] [stderr]     Checking encoding_rs v0.8.6
[INFO] [stderr]    Compiling openssl-sys v0.9.36
[INFO] [stderr]    Compiling libxml v0.2.4
[INFO] [stderr]    Compiling walkdir v2.2.5
[INFO] [stderr]    Compiling rand v0.5.5
[INFO] [stderr]     Checking want v0.0.4
[INFO] [stderr]     Checking tokio-current-thread v0.1.1
[INFO] [stderr]     Checking tokio-timer v0.2.6
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking mio v0.6.16
[INFO] [stderr]     Checking simple_logger v0.5.0
[INFO] [stderr]     Checking uuid v0.6.5
[INFO] [stderr]     Checking lock_api v0.1.4
[INFO] [stderr]    Compiling ryu v0.2.6
[INFO] [stderr]    Compiling pulldown-cmark v0.1.2
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling backtrace-sys v0.1.24
[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" "25434ac34d88d4e6b155b3f97528a466bea9055148f5cb4f7e48f7a27f91522a"`
[INFO] running `"docker" "rm" "-f" "25434ac34d88d4e6b155b3f97528a466bea9055148f5cb4f7e48f7a27f91522a"`
[INFO] [stdout] 25434ac34d88d4e6b155b3f97528a466bea9055148f5cb4f7e48f7a27f91522a