[INFO] fetching crate cargo-task 0.0.12...
[INFO] checking cargo-task-0.0.12 against master#4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5 for pr-81174
[INFO] extracting crate cargo-task 0.0.12 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate cargo-task 0.0.12 on toolchain 4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cargo-task 0.0.12
[INFO] finished tweaking crates.io crate cargo-task 0.0.12
[INFO] tweaked toml for crates.io crate cargo-task 0.0.12 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate cargo-task 0.0.12 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f72d641ccab3a7e018e8e1b2506404fb32159689c2cbfd14a5fbca918f5e583a
[INFO] running `Command { std: "docker" "start" "-a" "f72d641ccab3a7e018e8e1b2506404fb32159689c2cbfd14a5fbca918f5e583a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f72d641ccab3a7e018e8e1b2506404fb32159689c2cbfd14a5fbca918f5e583a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f72d641ccab3a7e018e8e1b2506404fb32159689c2cbfd14a5fbca918f5e583a", kill_on_drop: false }`
[INFO] [stdout] f72d641ccab3a7e018e8e1b2506404fb32159689c2cbfd14a5fbca918f5e583a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 44a46b972bb1483cadc9ed1f3c181415f7612f8ecb20dae0dfb65806bb498860
[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" "44a46b972bb1483cadc9ed1f3c181415f7612f8ecb20dae0dfb65806bb498860", kill_on_drop: false }`
[INFO] [stderr]    Compiling cargo-task v0.0.12 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0453]: allow(unused_unsafe) incompatible with previous forbid
[INFO] [stdout]    --> src/_cargo_task_util.rs:236:1
[INFO] [stdout]     |
[INFO] [stdout] 236 | / thread_local! {
[INFO] [stdout] 237 | |     static CT_ENV: std::sync::Mutex<Rc<CTEnv>> = std::sync::Mutex::new(priv_new_env());
[INFO] [stdout] 238 | | }
[INFO] [stdout]     | |_^ overruled by previous forbid
[INFO] [stdout]     | 
[INFO] [stdout]    ::: src/lib.rs:3:11
[INFO] [stdout]     |
[INFO] [stdout] 3   |   #![forbid(warnings)]
[INFO] [stdout]     |             -------- `forbid` level set here
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0453]: allow(unused_unsafe) incompatible with previous forbid
[INFO] [stdout]    --> src/_cargo_task_util.rs:236:1
[INFO] [stdout]     |
[INFO] [stdout] 236 | / thread_local! {
[INFO] [stdout] 237 | |     static CT_ENV: std::sync::Mutex<Rc<CTEnv>> = std::sync::Mutex::new(priv_new_env());
[INFO] [stdout] 238 | | }
[INFO] [stdout]     | |_^ overruled by previous forbid
[INFO] [stdout]     | 
[INFO] [stdout]    ::: src/lib.rs:3:11
[INFO] [stdout]     |
[INFO] [stdout] 3   |   #![forbid(warnings)]
[INFO] [stdout]     |             -------- `forbid` level set here
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0453`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cargo-task`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0453`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "44a46b972bb1483cadc9ed1f3c181415f7612f8ecb20dae0dfb65806bb498860", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "44a46b972bb1483cadc9ed1f3c181415f7612f8ecb20dae0dfb65806bb498860", kill_on_drop: false }`
[INFO] [stdout] 44a46b972bb1483cadc9ed1f3c181415f7612f8ecb20dae0dfb65806bb498860