[INFO] fetching crate intercom 0.3.0...
[INFO] checking intercom-0.3.0 against try#71b81291baafb8a58836272757b28817fe1d8190 for pr-73102
[INFO] extracting crate intercom 0.3.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate intercom 0.3.0 on toolchain 71b81291baafb8a58836272757b28817fe1d8190
[INFO] running `"/workspace/cargo-home/bin/cargo" "+71b81291baafb8a58836272757b28817fe1d8190" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate intercom 0.3.0
[INFO] finished tweaking crates.io crate intercom 0.3.0
[INFO] tweaked toml for crates.io crate intercom 0.3.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+71b81291baafb8a58836272757b28817fe1d8190" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+71b81291baafb8a58836272757b28817fe1d8190" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded intercom-attributes v0.3.0
[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" "+71b81291baafb8a58836272757b28817fe1d8190" "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] c352354686c4bb48e819468f97c7a3363942799a3a740a2b535734d17112694a
[INFO] running `"docker" "start" "-a" "c352354686c4bb48e819468f97c7a3363942799a3a740a2b535734d17112694a"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling syn v1.0.31
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling gimli v0.21.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.16
[INFO] [stderr]    Compiling object v0.19.0
[INFO] [stderr]    Compiling sha1 v0.3.0
[INFO] [stderr]    Compiling ordermap v0.3.5
[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling addr2line v0.12.1
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling backtrace v0.3.48
[INFO] [stderr]    Compiling serde_derive v1.0.111
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling intercom-common v0.3.0
[INFO] [stderr]    Compiling intercom-attributes v0.3.0
[INFO] [stderr]     Checking intercom v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]    --> src/combox.rs:196:9
[INFO] [stderr]     |
[INFO] [stderr] 196 |         ( previous_value + 1 )
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]    --> src/combox.rs:196:9
[INFO] [stderr]     |
[INFO] [stderr] 196 |         ( previous_value + 1 )
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/error.rs:111:34
[INFO] [stderr]     |
[INFO] [stderr] 111 |         }.with_message( io_error.description().to_owned() )
[INFO] [stderr]     |                                  ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/error.rs:111:34
[INFO] [stderr]     |
[INFO] [stderr] 111 |         }.with_message( io_error.description().to_owned() )
[INFO] [stderr]     |                                  ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `non_exhaustive` has been stable since 1.40.0 and no longer requires an attribute to enable
[INFO] [stderr]   --> src/lib.rs:49:28
[INFO] [stderr]    |
[INFO] [stderr] 49 | #![feature(specialization, non_exhaustive, integer_atomics)]
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `non_exhaustive` has been stable since 1.40.0 and no longer requires an attribute to enable
[INFO] [stderr]   --> src/lib.rs:49:28
[INFO] [stderr]    |
[INFO] [stderr] 49 | #![feature(specialization, non_exhaustive, integer_atomics)]
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 14s
[INFO] running `"docker" "inspect" "c352354686c4bb48e819468f97c7a3363942799a3a740a2b535734d17112694a"`
[INFO] running `"docker" "rm" "-f" "c352354686c4bb48e819468f97c7a3363942799a3a740a2b535734d17112694a"`
[INFO] [stdout] c352354686c4bb48e819468f97c7a3363942799a3a740a2b535734d17112694a