[INFO] crate idlset 0.1.3 is already in cache
[INFO] checking idlset-0.1.3 against master#fdc0011561c6365c596dfd8fa1ef388162bc89c7 for pr-66504-1
[INFO] extracting crate idlset 0.1.3 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate idlset 0.1.3 on toolchain fdc0011561c6365c596dfd8fa1ef388162bc89c7
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate idlset 0.1.3
[INFO] finished tweaking crates.io crate idlset 0.1.3
[INFO] tweaked toml for crates.io crate idlset 0.1.3 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate idlset 0.1.3 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 4d4622c1c7bcc8522fd1846658521e889218db9fa8f5d383f9de1d5e43aea662
[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" "4d4622c1c7bcc8522fd1846658521e889218db9fa8f5d383f9de1d5e43aea662"`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr]     Checking libc v0.2.43
[INFO] [stderr]     Checking time v0.1.40
[INFO] [stderr]     Checking idlset v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]    --> src/lib.rs:244:34
[INFO] [stderr]     |
[INFO] [stderr] 244 |                 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:244:34
[INFO] [stderr]     |
[INFO] [stderr] 244 |                 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 trailing semicolon
[INFO] [stderr]    --> src/lib.rs:597:33
[INFO] [stderr]     |
[INFO] [stderr] 597 |         println!("{:?}", idl_a);;
[INFO] [stderr]     |                                 ^ help: remove this semicolon
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(redundant_semicolon)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]    --> src/lib.rs:598:33
[INFO] [stderr]     |
[INFO] [stderr] 598 |         println!("{:?}", idl_b);;
[INFO] [stderr]     |                                 ^ help: remove this semicolon
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:235:9
[INFO] [stderr]     |
[INFO] [stderr] 235 | /         self.list.binary_search(&candidate)
[INFO] [stderr] 236 | |             .map(|idx| {
[INFO] [stderr] 237 | |                 // The listed range would contain our bit.
[INFO] [stderr] 238 | |                 // So we need to remove this, leaving all other bits in place.
[INFO] [stderr] ...   |
[INFO] [stderr] 244 | |                 existing.mask &= (!candidate.mask);
[INFO] [stderr] 245 | |             });
[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:235:9
[INFO] [stderr]     |
[INFO] [stderr] 235 | /         self.list.binary_search(&candidate)
[INFO] [stderr] 236 | |             .map(|idx| {
[INFO] [stderr] 237 | |                 // The listed range would contain our bit.
[INFO] [stderr] 238 | |                 // So we need to remove this, leaving all other bits in place.
[INFO] [stderr] ...   |
[INFO] [stderr] 244 | |                 existing.mask &= (!candidate.mask);
[INFO] [stderr] 245 | |             });
[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: method is never used: `len`
[INFO] [stderr]   --> src/idl_simple.rs:33:5
[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: method is never used: `len`
[INFO] [stderr]   --> src/idl_simple.rs:33:5
[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]     Finished dev [unoptimized + debuginfo] target(s) in 3.96s
[INFO] running `"docker" "inspect" "4d4622c1c7bcc8522fd1846658521e889218db9fa8f5d383f9de1d5e43aea662"`
[INFO] running `"docker" "rm" "-f" "4d4622c1c7bcc8522fd1846658521e889218db9fa8f5d383f9de1d5e43aea662"`
[INFO] [stdout] 4d4622c1c7bcc8522fd1846658521e889218db9fa8f5d383f9de1d5e43aea662