[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 master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpbchekin%2Fmutable-threads" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pbchekin/mutable-threads on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-5-tc1/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: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded thread_local v0.3.6
[INFO] [stderr]   Downloaded version_check v0.1.4
[INFO] [stderr]   Downloaded threadpool v1.7.1
[INFO] [stderr]   Downloaded lazy_static v1.1.0
[INFO] [stderr]   Downloaded aho-corasick v0.6.6
[INFO] [stderr]   Downloaded cfg-if v0.1.4
[INFO] [stderr]   Downloaded slab v0.1.3
[INFO] [stderr]   Downloaded redox_syscall v0.1.40
[INFO] [stderr]   Downloaded bytes v0.3.0
[INFO] [stderr]   Downloaded net2 v0.2.33
[INFO] [stderr]   Downloaded log v0.4.3
[INFO] [stderr]   Downloaded nix v0.5.1
[INFO] [stderr]   Downloaded mio v0.5.1
[INFO] [stderr]   Downloaded regex-syntax v0.6.2
[INFO] [stderr]   Downloaded regex v1.0.2
[INFO] [stderr]   Downloaded libc v0.2.43
[INFO] [stderr]   Downloaded bitflags v0.4.0
[INFO] [stderr]   Downloaded winapi v0.3.5
[INFO] [stderr]   Downloaded linebased v0.3.1
[INFO] [stderr]   Downloaded miow v0.1.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] af51f051c5f5d01a9a1c7905cade6ff0d6bcceaa86d1c1cca6d832be1c0044fe
[INFO] running `Command { std: "docker" "start" "-a" "af51f051c5f5d01a9a1c7905cade6ff0d6bcceaa86d1c1cca6d832be1c0044fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "af51f051c5f5d01a9a1c7905cade6ff0d6bcceaa86d1c1cca6d832be1c0044fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af51f051c5f5d01a9a1c7905cade6ff0d6bcceaa86d1c1cca6d832be1c0044fe", kill_on_drop: false }`
[INFO] [stdout] af51f051c5f5d01a9a1c7905cade6ff0d6bcceaa86d1c1cca6d832be1c0044fe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 92b27b79c0f081f422e1f674f2e49665be4af3ce7b93549697a53a6c8d654d5f
[INFO] running `Command { std: "docker" "start" "-a" "92b27b79c0f081f422e1f674f2e49665be4af3ce7b93549697a53a6c8d654d5f", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.43
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]     Checking cfg-if v0.1.4
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]    Compiling version_check v0.1.4
[INFO] [stderr]     Checking bitflags v0.4.0
[INFO] [stderr]    Compiling regex v1.0.2
[INFO] [stderr]     Checking ucd-util v0.1.1
[INFO] [stderr]     Checking bytes v0.3.0
[INFO] [stderr]     Checking slab v0.1.3
[INFO] [stderr]     Checking utf8-ranges v1.0.0
[INFO] [stderr]     Checking log v0.4.3
[INFO] [stderr]     Checking regex-syntax v0.6.2
[INFO] [stderr]    Compiling ws2_32-sys v0.2.1
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking time v0.1.40
[INFO] [stderr]     Checking nix v0.5.1
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking aho-corasick v0.6.6
[INFO] [stderr]     Checking threadpool v1.7.1
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking miow v0.1.5
[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` profile [unoptimized + debuginfo] target(s) in 2.81s
[INFO] running `Command { std: "docker" "inspect" "92b27b79c0f081f422e1f674f2e49665be4af3ce7b93549697a53a6c8d654d5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92b27b79c0f081f422e1f674f2e49665be4af3ce7b93549697a53a6c8d654d5f", kill_on_drop: false }`
[INFO] [stdout] 92b27b79c0f081f422e1f674f2e49665be4af3ce7b93549697a53a6c8d654d5f
[INFO] checking pbchekin/mutable-threads against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpbchekin%2Fmutable-threads" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pbchekin/mutable-threads on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-5-tc2/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: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f6ebc63195684908442e8c5c844a4e5fd184d1d1eb46cc3d6509af6b6b477d0b
[INFO] running `Command { std: "docker" "start" "-a" "f6ebc63195684908442e8c5c844a4e5fd184d1d1eb46cc3d6509af6b6b477d0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f6ebc63195684908442e8c5c844a4e5fd184d1d1eb46cc3d6509af6b6b477d0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6ebc63195684908442e8c5c844a4e5fd184d1d1eb46cc3d6509af6b6b477d0b", kill_on_drop: false }`
[INFO] [stdout] f6ebc63195684908442e8c5c844a4e5fd184d1d1eb46cc3d6509af6b6b477d0b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e9aee9e7a673a1703c925be734c1ebc23632b26785c83f1342c0f50758e6f79a
[INFO] running `Command { std: "docker" "start" "-a" "e9aee9e7a673a1703c925be734c1ebc23632b26785c83f1342c0f50758e6f79a", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.43
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]     Checking cfg-if v0.1.4
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]    Compiling version_check v0.1.4
[INFO] [stderr]     Checking bitflags v0.4.0
[INFO] [stderr]     Checking bytes v0.3.0
[INFO] [stderr]     Checking ucd-util v0.1.1
[INFO] [stderr]     Checking slab v0.1.3
[INFO] [stderr]    Compiling regex v1.0.2
[INFO] [stderr]     Checking utf8-ranges v1.0.0
[INFO] [stderr]     Checking log v0.4.3
[INFO] [stderr]     Checking regex-syntax v0.6.2
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]    Compiling ws2_32-sys v0.2.1
[INFO] [stderr]     Checking log v0.3.9
[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 thread_local v0.3.6
[INFO] [stderr]     Checking miow v0.1.5
[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` profile [unoptimized + debuginfo] target(s) in 2.65s
[INFO] running `Command { std: "docker" "inspect" "e9aee9e7a673a1703c925be734c1ebc23632b26785c83f1342c0f50758e6f79a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9aee9e7a673a1703c925be734c1ebc23632b26785c83f1342c0f50758e6f79a", kill_on_drop: false }`
[INFO] [stdout] e9aee9e7a673a1703c925be734c1ebc23632b26785c83f1342c0f50758e6f79a