[INFO] crate discard 1.0.4 is already in cache
[INFO] checking discard-1.0.4 against master#4fb54ed484e2239a3e9eff3be17df00d2a162be3 for pr-73345
[INFO] extracting crate discard 1.0.4 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate discard 1.0.4 on toolchain 4fb54ed484e2239a3e9eff3be17df00d2a162be3
[INFO] running `"/workspace/cargo-home/bin/cargo" "+4fb54ed484e2239a3e9eff3be17df00d2a162be3" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate discard 1.0.4
[INFO] finished tweaking crates.io crate discard 1.0.4
[INFO] tweaked toml for crates.io crate discard 1.0.4 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+4fb54ed484e2239a3e9eff3be17df00d2a162be3" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+4fb54ed484e2239a3e9eff3be17df00d2a162be3" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+4fb54ed484e2239a3e9eff3be17df00d2a162be3" "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] aa61acdeca403a1e825b797415e49353e23af2536194e9e10bdf330a48c8421a
[INFO] running `"docker" "start" "-a" "aa61acdeca403a1e825b797415e49353e23af2536194e9e10bdf330a48c8421a"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking discard v1.0.4 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused `DiscardOnDrop` that must be used
[INFO] [stderr]    --> src/lib.rs:261:9
[INFO] [stderr]     |
[INFO] [stderr] 261 |         DiscardOnDrop::new(Foo::new());
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: 
[INFO] [stderr]             The DiscardOnDrop is unused, which causes it to be immediately discarded.
[INFO] [stderr]             You probably don't want that to happen.
[INFO] [stderr]             
[INFO] [stderr]             How to fix this:
[INFO] [stderr]             
[INFO] [stderr]               * Store the DiscardOnDrop in a variable or data structure.
[INFO] [stderr]             
[INFO] [stderr]               * Or use the DiscardOnDrop::leak function which will cause it to not be
[INFO] [stderr]                 discarded (this *will* leak memory!).
[INFO] [stderr]             
[INFO] [stderr]             See the DiscardOnDrop documentation for more details.
[INFO] [stderr] 
[INFO] [stderr] warning: unused `DiscardOnDrop` that must be used
[INFO] [stderr]    --> src/lib.rs:262:9
[INFO] [stderr]     |
[INFO] [stderr] 262 |         DiscardOnDrop::new(Foo::new());
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: 
[INFO] [stderr]             The DiscardOnDrop is unused, which causes it to be immediately discarded.
[INFO] [stderr]             You probably don't want that to happen.
[INFO] [stderr]             
[INFO] [stderr]             How to fix this:
[INFO] [stderr]             
[INFO] [stderr]               * Store the DiscardOnDrop in a variable or data structure.
[INFO] [stderr]             
[INFO] [stderr]               * Or use the DiscardOnDrop::leak function which will cause it to not be
[INFO] [stderr]                 discarded (this *will* leak memory!).
[INFO] [stderr]             
[INFO] [stderr]             See the DiscardOnDrop documentation for more details.
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.31s
[INFO] running `"docker" "inspect" "aa61acdeca403a1e825b797415e49353e23af2536194e9e10bdf330a48c8421a"`
[INFO] running `"docker" "rm" "-f" "aa61acdeca403a1e825b797415e49353e23af2536194e9e10bdf330a48c8421a"`
[INFO] [stdout] aa61acdeca403a1e825b797415e49353e23af2536194e9e10bdf330a48c8421a