[INFO] fetching crate midi20 0.2.0...
[INFO] checking midi20-0.2.0 against try#1463461488056994d1b84e8b752e7c11c7fae7aa for pr-154205
[INFO] extracting crate midi20 0.2.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate midi20 0.2.0
[INFO] finished tweaking crates.io crate midi20 0.2.0
[INFO] tweaked toml for crates.io crate midi20 0.2.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate midi20 0.2.0 on toolchain 1463461488056994d1b84e8b752e7c11c7fae7aa
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1463461488056994d1b84e8b752e7c11c7fae7aa" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1463461488056994d1b84e8b752e7c11c7fae7aa" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1463461488056994d1b84e8b752e7c11c7fae7aa" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1463461488056994d1b84e8b752e7c11c7fae7aa" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 59690f3416782b3d25c85e0d3ddd1d0b2f21071dc11a238b0f50dc86c81b60ff
[INFO] running `Command { std: "docker" "start" "-a" "59690f3416782b3d25c85e0d3ddd1d0b2f21071dc11a238b0f50dc86c81b60ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "59690f3416782b3d25c85e0d3ddd1d0b2f21071dc11a238b0f50dc86c81b60ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59690f3416782b3d25c85e0d3ddd1d0b2f21071dc11a238b0f50dc86c81b60ff", kill_on_drop: false }`
[INFO] [stdout] 59690f3416782b3d25c85e0d3ddd1d0b2f21071dc11a238b0f50dc86c81b60ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1463461488056994d1b84e8b752e7c11c7fae7aa" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f64293a7a8c91ab0e8282f4c8328f6f56f1fed874c19a4dd0159b1c869aaaba7
[INFO] running `Command { std: "docker" "start" "-a" "f64293a7a8c91ab0e8282f4c8328f6f56f1fed874c19a4dd0159b1c869aaaba7", kill_on_drop: false }`
[INFO] [stderr]     Checking midi20 v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: this creates a dangling pointer because temporary `[u32; 3]` is dropped at end of statement
[INFO] [stdout]   --> src/message/flex.rs:86:36
[INFO] [stdout]    |
[INFO] [stdout] 86 |             let data = self.data().as_ptr().cast();
[INFO] [stdout]    |                        ----------- ^^^^^^ pointer created here
[INFO] [stdout]    |                        |
[INFO] [stdout]    |                        this `[u32; 3]` is dropped at end of statement
[INFO] [stdout]    |
[INFO] [stdout]    = help: bind the `[u32; 3]` to a variable such that it outlives the pointer returned by `as_ptr`
[INFO] [stdout]    = note: a dangling pointer is safe, but dereferencing one is undefined behavior
[INFO] [stdout]    = note: returning a pointer to a local variable will always result in a dangling pointer
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/reference/destructors.html>
[INFO] [stdout]    = note: `#[warn(dangling_pointers_from_temporaries)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this creates a dangling pointer because temporary `[u32; 3]` is dropped at end of statement
[INFO] [stdout]   --> src/message/flex.rs:86:36
[INFO] [stdout]    |
[INFO] [stdout] 86 |             let data = self.data().as_ptr().cast();
[INFO] [stdout]    |                        ----------- ^^^^^^ pointer created here
[INFO] [stdout]    |                        |
[INFO] [stdout]    |                        this `[u32; 3]` is dropped at end of statement
[INFO] [stdout]    |
[INFO] [stdout]    = help: bind the `[u32; 3]` to a variable such that it outlives the pointer returned by `as_ptr`
[INFO] [stdout]    = note: a dangling pointer is safe, but dereferencing one is undefined behavior
[INFO] [stdout]    = note: returning a pointer to a local variable will always result in a dangling pointer
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/reference/destructors.html>
[INFO] [stdout]    = note: `#[warn(dangling_pointers_from_temporaries)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `Command { std: "docker" "inspect" "f64293a7a8c91ab0e8282f4c8328f6f56f1fed874c19a4dd0159b1c869aaaba7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f64293a7a8c91ab0e8282f4c8328f6f56f1fed874c19a4dd0159b1c869aaaba7", kill_on_drop: false }`
[INFO] [stdout] f64293a7a8c91ab0e8282f4c8328f6f56f1fed874c19a4dd0159b1c869aaaba7