[INFO] crate sccache 0.2.12 is already in cache
[INFO] checking sccache-0.2.12 against try#1a608893c03d7722effeb0058e82770bd36b4b3c for pr-66504-1
[INFO] extracting crate sccache 0.2.12 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate sccache 0.2.12 on toolchain 1a608893c03d7722effeb0058e82770bd36b4b3c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate sccache 0.2.12
[INFO] finished tweaking crates.io crate sccache 0.2.12
[INFO] tweaked toml for crates.io crate sccache 0.2.12 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate sccache 0.2.12 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-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] ac4884975b6d4ac0cdb3b142bb68155e401eb4f47a3efbc020abd1aa1d9a421e
[INFO] running `"docker" "start" "-a" "ac4884975b6d4ac0cdb3b142bb68155e401eb4f47a3efbc020abd1aa1d9a421e"`
[INFO] [stderr]    Compiling libc v0.2.44
[INFO] [stderr]     Checking rand_core v0.3.0
[INFO] [stderr]    Compiling cc v1.0.25
[INFO] [stderr]    Compiling proc-macro2 v0.4.24
[INFO] [stderr]     Checking slab v0.4.1
[INFO] [stderr]     Checking lazycell v1.2.0
[INFO] [stderr]    Compiling serde v1.0.80
[INFO] [stderr]    Compiling httparse v1.3.3
[INFO] [stderr]     Checking safemem v0.3.0
[INFO] [stderr]     Checking unicode-normalization v0.1.7
[INFO] [stderr]    Compiling openssl v0.10.15
[INFO] [stderr]    Compiling encoding_rs v0.8.10
[INFO] [stderr]    Compiling failure_derive v0.1.3
[INFO] [stderr]     Checking dtoa v0.4.3
[INFO] [stderr]     Checking string v0.1.2
[INFO] [stderr]    Compiling flate2-crc v0.1.1
[INFO] [stderr]    Compiling native-tls v0.2.2
[INFO] [stderr]     Checking rustc-demangle v0.1.9
[INFO] [stderr]     Checking arc-swap v0.3.6
[INFO] [stderr]    Compiling escargot v0.3.1
[INFO] [stderr]     Checking predicates-core v0.9.0
[INFO] [stderr]     Checking termcolor v1.0.4
[INFO] [stderr]     Checking linked-hash-map v0.2.1
[INFO] [stderr]     Checking counted-array v0.1.2
[INFO] [stderr]     Checking either v1.5.0
[INFO] [stderr]     Checking crossbeam-utils v0.6.1
[INFO] [stderr]     Checking tokio-executor v0.1.5
[INFO] [stderr]    Compiling unicase v2.2.0
[INFO] [stderr]    Compiling memchr v2.1.1
[INFO] [stderr]     Checking tokio-service v0.1.0
[INFO] [stderr]     Checking relay v0.1.1
[INFO] [stderr]     Checking ar v0.6.1
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]    Compiling getopts v0.2.18
[INFO] [stderr]     Checking miniz_oxide v0.2.0
[INFO] [stderr]     Checking regex-syntax v0.6.3
[INFO] [stderr]     Checking base64 v0.9.3
[INFO] [stderr]     Checking vte v0.3.3
[INFO] [stderr]     Checking humantime v1.1.1
[INFO] [stderr]     Checking rand_core v0.2.2
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.0
[INFO] [stderr]     Checking rand_xorshift v0.1.0
[INFO] [stderr]     Checking predicates-tree v0.9.0
[INFO] [stderr]     Checking want v0.0.6
[INFO] [stderr]     Checking want v0.0.4
[INFO] [stderr]     Checking smallvec v0.6.6
[INFO] [stderr]     Checking itertools v0.7.9
[INFO] [stderr]     Checking tokio-current-thread v0.1.4
[INFO] [stderr]     Checking tokio-timer v0.2.8
[INFO] [stderr]     Checking crossbeam-epoch v0.6.1
[INFO] [stderr]     Checking strip-ansi-escapes v0.1.0
[INFO] [stderr]    Compiling rand_pcg v0.1.1
[INFO] [stderr]    Compiling rand_chacha v0.1.0
[INFO] [stderr]    Compiling rand v0.6.1
[INFO] [stderr]     Checking num-integer v0.1.39
[INFO] [stderr]     Checking number_prefix v0.2.8
[INFO] [stderr]     Checking float-cmp v0.4.0
[INFO] [stderr]    Compiling phf_shared v0.7.23
[INFO] [stderr]    Compiling pulldown-cmark v0.0.3
[INFO] [stderr]     Checking libflate v0.1.18
[INFO] [stderr]     Checking crossbeam-deque v0.6.2
[INFO] [stderr]     Checking phf v0.7.23
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]     Checking num_cpus v1.8.0
[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-0.0.3/src/utils.rs:45:30
[INFO] [stderr]    |
[INFO] [stderr] 45 |         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" "ac4884975b6d4ac0cdb3b142bb68155e401eb4f47a3efbc020abd1aa1d9a421e"`
[INFO] running `"docker" "rm" "-f" "ac4884975b6d4ac0cdb3b142bb68155e401eb4f47a3efbc020abd1aa1d9a421e"`
[INFO] [stdout] ac4884975b6d4ac0cdb3b142bb68155e401eb4f47a3efbc020abd1aa1d9a421e