[INFO] fetching crate idlset 0.1.7...
[INFO] checking idlset-0.1.7 against try#1a399c10897767c36d147199696c96f193034e49 for pr-72644
[INFO] extracting crate idlset 0.1.7 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate idlset 0.1.7 on toolchain 1a399c10897767c36d147199696c96f193034e49
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a399c10897767c36d147199696c96f193034e49" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate idlset 0.1.7
[INFO] finished tweaking crates.io crate idlset 0.1.7
[INFO] tweaked toml for crates.io crate idlset 0.1.7 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate crates.io crate idlset 0.1.7 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a399c10897767c36d147199696c96f193034e49" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+1a399c10897767c36d147199696c96f193034e49" "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] 836715bb6df80e6c247a5f738d977b036fb06fb09ee0cf549de198b0617b2267
[INFO] running `"docker" "start" "-a" "836715bb6df80e6c247a5f738d977b036fb06fb09ee0cf549de198b0617b2267"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling serde v1.0.105
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]    Compiling serde_derive v1.0.105
[INFO] [stderr]     Checking smallvec v1.2.0
[INFO] [stderr]     Checking idlset v0.1.7 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]    --> src/lib.rs:275:30
[INFO] [stderr]     |
[INFO] [stderr] 275 |             existing.mask &= (!candidate.mask);
[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 assigned value
[INFO] [stderr]    --> src/lib.rs:275:30
[INFO] [stderr]     |
[INFO] [stderr] 275 |             existing.mask &= (!candidate.mask);
[INFO] [stderr]     |                              ^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:267:9
[INFO] [stderr]     |
[INFO] [stderr] 267 | /         self.list.binary_search(&candidate).map(|idx| {
[INFO] [stderr] 268 | |             // The listed range would contain our bit.
[INFO] [stderr] 269 | |             // So we need to remove this, leaving all other bits in place.
[INFO] [stderr] 270 | |             //
[INFO] [stderr] ...   |
[INFO] [stderr] 275 | |             existing.mask &= (!candidate.mask);
[INFO] [stderr] 276 | |         });
[INFO] [stderr]     | |___________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:267:9
[INFO] [stderr]     |
[INFO] [stderr] 267 | /         self.list.binary_search(&candidate).map(|idx| {
[INFO] [stderr] 268 | |             // The listed range would contain our bit.
[INFO] [stderr] 269 | |             // So we need to remove this, leaving all other bits in place.
[INFO] [stderr] 270 | |             //
[INFO] [stderr] ...   |
[INFO] [stderr] 275 | |             existing.mask &= (!candidate.mask);
[INFO] [stderr] 276 | |         });
[INFO] [stderr]     | |___________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `len`
[INFO] [stderr]   --> src/idl_simple.rs:33:8
[INFO] [stderr]    |
[INFO] [stderr] 33 |     fn len(&self) -> usize {
[INFO] [stderr]    |        ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `len`
[INFO] [stderr]   --> src/idl_simple.rs:33:8
[INFO] [stderr]    |
[INFO] [stderr] 33 |     fn len(&self) -> usize {
[INFO] [stderr]    |        ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 29.05s
[INFO] running `"docker" "inspect" "836715bb6df80e6c247a5f738d977b036fb06fb09ee0cf549de198b0617b2267"`
[INFO] running `"docker" "rm" "-f" "836715bb6df80e6c247a5f738d977b036fb06fb09ee0cf549de198b0617b2267"`
[INFO] [stdout] 836715bb6df80e6c247a5f738d977b036fb06fb09ee0cf549de198b0617b2267