[INFO] cloning repository https://github.com/pbchekin/mutable-threads
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pbchekin/mutable-threads" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpbchekin%2Fmutable-threads", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpbchekin%2Fmutable-threads'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f2a00d2b133bf00276fb34b55df64f8e9c5d6b63
[INFO] checking pbchekin/mutable-threads against try#c8bdaa84ec1b37f18f30375e196a65b7602f3790 for pr-73345
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpbchekin%2Fmutable-threads" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pbchekin/mutable-threads on toolchain c8bdaa84ec1b37f18f30375e196a65b7602f3790
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/pbchekin/mutable-threads
[INFO] finished tweaking git repo https://github.com/pbchekin/mutable-threads
[INFO] tweaked toml for git repo https://github.com/pbchekin/mutable-threads written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/pbchekin/mutable-threads already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:6c9ffe128752d56c8d75334ed354142a5229917ed99767f56566dd8e857ad726" "/opt/rustwide/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 267a8b833cf7aa5b1d46d90e4fe73a20cd0ac62f1f1eacce43a1a5e91ac174e5
[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" "267a8b833cf7aa5b1d46d90e4fe73a20cd0ac62f1f1eacce43a1a5e91ac174e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "267a8b833cf7aa5b1d46d90e4fe73a20cd0ac62f1f1eacce43a1a5e91ac174e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "267a8b833cf7aa5b1d46d90e4fe73a20cd0ac62f1f1eacce43a1a5e91ac174e5", kill_on_drop: false }`
[INFO] [stdout] 267a8b833cf7aa5b1d46d90e4fe73a20cd0ac62f1f1eacce43a1a5e91ac174e5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:6c9ffe128752d56c8d75334ed354142a5229917ed99767f56566dd8e857ad726" "/opt/rustwide/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 97cdaa9843e7fdd1e532e165c92ce1f92daf8ffe1c291150d5b8b5635571f9e7
[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" "97cdaa9843e7fdd1e532e165c92ce1f92daf8ffe1c291150d5b8b5635571f9e7", kill_on_drop: false }`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking libc v0.2.43
[INFO] [stderr]    Compiling version_check v0.1.4
[INFO] [stderr]     Checking slab v0.1.3
[INFO] [stderr]     Checking bytes v0.3.0
[INFO] [stderr]    Compiling regex v1.0.2
[INFO] [stderr]     Checking utf8-ranges v1.0.0
[INFO] [stderr]    Compiling ws2_32-sys v0.2.1
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking regex-syntax v0.6.2
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking nix v0.5.1
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking time v0.1.40
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking threadpool v1.7.1
[INFO] [stderr]     Checking aho-corasick v0.6.6
[INFO] [stderr]     Checking miow v0.1.5
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking mio v0.5.1
[INFO] [stderr]     Checking linebased v0.3.1
[INFO] [stderr]     Checking mute-test v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.87s
[INFO] running `Command { std: "docker" "inspect" "97cdaa9843e7fdd1e532e165c92ce1f92daf8ffe1c291150d5b8b5635571f9e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97cdaa9843e7fdd1e532e165c92ce1f92daf8ffe1c291150d5b8b5635571f9e7", kill_on_drop: false }`
[INFO] [stdout] 97cdaa9843e7fdd1e532e165c92ce1f92daf8ffe1c291150d5b8b5635571f9e7