[INFO] cloning repository https://github.com/lk86/rust-fifo-ex
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lk86/rust-fifo-ex" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flk86%2Frust-fifo-ex", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flk86%2Frust-fifo-ex'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4aff655081997fa47718b5a1e7fcb6fd677bfc4f
[INFO] checking lk86/rust-fifo-ex against try#ddfd70ee3c3748e597b32f416b0d15a4f6e37685 for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flk86%2Frust-fifo-ex" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lk86/rust-fifo-ex on toolchain ddfd70ee3c3748e597b32f416b0d15a4f6e37685
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lk86/rust-fifo-ex
[INFO] finished tweaking git repo https://github.com/lk86/rust-fifo-ex
[INFO] tweaked toml for git repo https://github.com/lk86/rust-fifo-ex written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/lk86/rust-fifo-ex already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 503f0992364959d49fde457b81f9ac8d0b852aa65f90e763ffbb2599b41deb8e
[INFO] running `Command { std: "docker" "start" "-a" "503f0992364959d49fde457b81f9ac8d0b852aa65f90e763ffbb2599b41deb8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "503f0992364959d49fde457b81f9ac8d0b852aa65f90e763ffbb2599b41deb8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "503f0992364959d49fde457b81f9ac8d0b852aa65f90e763ffbb2599b41deb8e", kill_on_drop: false }`
[INFO] [stdout] 503f0992364959d49fde457b81f9ac8d0b852aa65f90e763ffbb2599b41deb8e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d58474901fba2c345e577b81df8692b9cc5596666dcc23c7525d13bc5da3bad6
[INFO] running `Command { std: "docker" "start" "-a" "d58474901fba2c345e577b81df8692b9cc5596666dcc23c7525d13bc5da3bad6", kill_on_drop: false }`
[INFO] [stderr]     Checking winapi v0.2.7
[INFO] [stderr]     Checking libc v0.2.11
[INFO] [stderr]     Checking bitflags v0.4.0
[INFO] [stderr]     Checking bytes v0.3.0
[INFO] [stderr]     Checking log v0.3.6
[INFO] [stderr]     Checking slab v0.1.3
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]    Compiling ws2_32-sys v0.2.1
[INFO] [stderr]     Checking nix v0.5.0
[INFO] [stderr]     Checking net2 v0.2.23
[INFO] [stderr]     Checking time v0.1.35
[INFO] [stderr]     Checking miow v0.1.2
[INFO] [stdout] error[E0591]: can't transmute zero-sized type
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/nix-0.5.0/src/sched.rs:192:20
[INFO] [stdout]     |
[INFO] [stdout] 192 |         ffi::clone(mem::transmute(callback), ptr as *mut c_void, flags.bits(), &mut cb)
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: source type: for<'r> extern "C" fn(*mut Box<(dyn FnMut() -> isize + 'r)>) -> i32 {callback}
[INFO] [stdout]     = note: target type: *const for<'r> extern "C" fn(*const Box<(dyn FnMut() -> isize + 'r)>) -> i32
[INFO] [stdout]     = help: cast with `as` to a pointer instead
[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 E0591`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `nix`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "d58474901fba2c345e577b81df8692b9cc5596666dcc23c7525d13bc5da3bad6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d58474901fba2c345e577b81df8692b9cc5596666dcc23c7525d13bc5da3bad6", kill_on_drop: false }`
[INFO] [stdout] d58474901fba2c345e577b81df8692b9cc5596666dcc23c7525d13bc5da3bad6