[INFO] crate dhall 0.2.1 is already in cache
[INFO] checking dhall-0.2.1 against master#6250d56355d72264ece721e8d0dc95b16a6824b1 for pr-68350
[INFO] extracting crate dhall 0.2.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate dhall 0.2.1 on toolchain 6250d56355d72264ece721e8d0dc95b16a6824b1
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate dhall 0.2.1
[INFO] finished tweaking crates.io crate dhall 0.2.1
[INFO] tweaked toml for crates.io crate dhall 0.2.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[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" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] efe6a0fe2020189c72487516a9842f14f979e30afd936e2babaf9ec3625e51e9
[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" "efe6a0fe2020189c72487516a9842f14f979e30afd936e2babaf9ec3625e51e9"`
[INFO] [stderr]    Compiling typed-arena v1.7.0
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]     Checking serde_cbor v0.9.0
[INFO] [stderr]    Compiling pest_generator v2.1.1
[INFO] [stderr]    Compiling nom v5.1.0
[INFO] [stderr]    Compiling pest_consume_macros v1.0.2
[INFO] [stderr]    Compiling pretty v0.5.2
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling abnf v0.6.1
[INFO] [stderr]     Checking pest_consume v1.0.2
[INFO] [stderr]    Compiling abnf_to_pest v0.2.0
[INFO] [stderr]    Compiling dhall v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]    --> src/tests.rs:231:5
[INFO] [stderr]     |
[INFO] [stderr] 231 | /     macro_rules! make_spec_test {
[INFO] [stderr] 232 | |         ($type:expr, $name:ident) => {
[INFO] [stderr] 233 | |             #[test]
[INFO] [stderr] 234 | |             #[allow(non_snake_case)]
[INFO] [stderr] ...   |
[INFO] [stderr] 243 | |         };
[INFO] [stderr] 244 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_macros)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `slice_patterns` has been stable since 1.42.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(slice_patterns)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `slice_patterns` has been stable since 1.42.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(slice_patterns)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 31.04s
[INFO] running `"docker" "inspect" "efe6a0fe2020189c72487516a9842f14f979e30afd936e2babaf9ec3625e51e9"`
[INFO] running `"docker" "rm" "-f" "efe6a0fe2020189c72487516a9842f14f979e30afd936e2babaf9ec3625e51e9"`
[INFO] [stdout] efe6a0fe2020189c72487516a9842f14f979e30afd936e2babaf9ec3625e51e9