[INFO] fetching crate tst 0.10.1...
[INFO] checking tst-0.10.1 against master#836c31742687ba4e2f857b5b698e1e9e6b67619c for pr-81789
[INFO] extracting crate tst 0.10.1 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate tst 0.10.1 on toolchain 836c31742687ba4e2f857b5b698e1e9e6b67619c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tst 0.10.1
[INFO] finished tweaking crates.io crate tst 0.10.1
[INFO] tweaked toml for crates.io crate tst 0.10.1 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0e735cb4359013b8241d67007c4e162b394cb3dbb497b42db8f60c4596f4c411
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "0e735cb4359013b8241d67007c4e162b394cb3dbb497b42db8f60c4596f4c411", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0e735cb4359013b8241d67007c4e162b394cb3dbb497b42db8f60c4596f4c411", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e735cb4359013b8241d67007c4e162b394cb3dbb497b42db8f60c4596f4c411", kill_on_drop: false }`
[INFO] [stdout] 0e735cb4359013b8241d67007c4e162b394cb3dbb497b42db8f60c4596f4c411
[INFO] running `Command { std: "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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6d0e5176fe9d9eb15bf547704dd6143381785ad9b1c20700a1aed17f5ea59d11
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6d0e5176fe9d9eb15bf547704dd6143381785ad9b1c20700a1aed17f5ea59d11", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]     Checking tst v0.10.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/set.rs:268:17
[INFO] [stdout]     |
[INFO] [stdout] 268 | impl<'x> Extend<(&'x str)> for TSTSet {
[INFO] [stdout]     |                 ^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/set.rs:270:36
[INFO] [stdout]     |
[INFO] [stdout] 270 |     fn extend<I: IntoIterator<Item=(&'x str)>>(&mut self, iter: I) {
[INFO] [stdout]     |                                    ^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling jemalloc-sys v0.1.8
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking jemallocator v0.1.9
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/set.rs:268:17
[INFO] [stdout]     |
[INFO] [stdout] 268 | impl<'x> Extend<(&'x str)> for TSTSet {
[INFO] [stdout]     |                 ^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/set.rs:270:36
[INFO] [stdout]     |
[INFO] [stdout] 270 |     fn extend<I: IntoIterator<Item=(&'x str)>>(&mut self, iter: I) {
[INFO] [stdout]     |                                    ^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 11s
[INFO] running `Command { std: "docker" "inspect" "6d0e5176fe9d9eb15bf547704dd6143381785ad9b1c20700a1aed17f5ea59d11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d0e5176fe9d9eb15bf547704dd6143381785ad9b1c20700a1aed17f5ea59d11", kill_on_drop: false }`
[INFO] [stdout] 6d0e5176fe9d9eb15bf547704dd6143381785ad9b1c20700a1aed17f5ea59d11