[INFO] fetching crate const-linear 0.1.0...
[INFO] checking const-linear-0.1.0 against master#a836d9b6413d9d593be6c09463ff8c4c70e56599 for pr-84037
[INFO] extracting crate const-linear 0.1.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate const-linear 0.1.0 on toolchain a836d9b6413d9d593be6c09463ff8c4c70e56599
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a836d9b6413d9d593be6c09463ff8c4c70e56599" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate const-linear 0.1.0
[INFO] finished tweaking crates.io crate const-linear 0.1.0
[INFO] tweaked toml for crates.io crate const-linear 0.1.0 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a836d9b6413d9d593be6c09463ff8c4c70e56599" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a836d9b6413d9d593be6c09463ff8c4c70e56599" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+a836d9b6413d9d593be6c09463ff8c4c70e56599" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 952d2911cfe7c154f7b87814944a474828e43763217b1fb67bc96c2bf7792abd
[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" "952d2911cfe7c154f7b87814944a474828e43763217b1fb67bc96c2bf7792abd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "952d2911cfe7c154f7b87814944a474828e43763217b1fb67bc96c2bf7792abd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "952d2911cfe7c154f7b87814944a474828e43763217b1fb67bc96c2bf7792abd", kill_on_drop: false }`
[INFO] [stdout] 952d2911cfe7c154f7b87814944a474828e43763217b1fb67bc96c2bf7792abd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+a836d9b6413d9d593be6c09463ff8c4c70e56599" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 80a51f0cabcf56044460335cf1216c7a8d635f7c9e422e445578e40c52d9422f
[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" "80a51f0cabcf56044460335cf1216c7a8d635f7c9e422e445578e40c52d9422f", kill_on_drop: false }`
[INFO] [stderr]     Checking const-linear v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary braces around const expression
[INFO] [stdout]     --> src/matrix/mod.rs:1272:27
[INFO] [stdout]      |
[INFO] [stdout] 1272 | impl<T: Scalar> Vector<T, { 3 }> {
[INFO] [stdout]      |                           ^^^^^ help: remove these braces
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around const expression
[INFO] [stdout]     --> src/matrix/mod.rs:1272:27
[INFO] [stdout]      |
[INFO] [stdout] 1272 | impl<T: Scalar> Vector<T, { 3 }> {
[INFO] [stdout]      |                           ^^^^^ help: remove these braces
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: not automatically applying `DerefMut` on `ManuallyDrop` union field
[INFO] [stdout]    --> src/utils.rs:172:26
[INFO] [stdout]     |
[INFO] [stdout] 172 |                     &mut self.inner.maybe_uninit[self.length - 1],
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: writing to this reference calls the destructor for the old value
[INFO] [stdout]     = help: add an explicit `*` if that is desired, or call `ptr::write` to not run the destructor
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `const-linear`
[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: not automatically applying `DerefMut` on `ManuallyDrop` union field
[INFO] [stdout]    --> src/utils.rs:172:26
[INFO] [stdout]     |
[INFO] [stdout] 172 |                     &mut self.inner.maybe_uninit[self.length - 1],
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: writing to this reference calls the destructor for the old value
[INFO] [stdout]     = help: add an explicit `*` if that is desired, or call `ptr::write` to not run the destructor
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "80a51f0cabcf56044460335cf1216c7a8d635f7c9e422e445578e40c52d9422f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80a51f0cabcf56044460335cf1216c7a8d635f7c9e422e445578e40c52d9422f", kill_on_drop: false }`
[INFO] [stdout] 80a51f0cabcf56044460335cf1216c7a8d635f7c9e422e445578e40c52d9422f