[INFO] cloning repository https://github.com/philipr-za/channel_thread_dropping_bug
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/philipr-za/channel_thread_dropping_bug" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphilipr-za%2Fchannel_thread_dropping_bug", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphilipr-za%2Fchannel_thread_dropping_bug'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1a1e3f76f4901919acd050385a3b6c2262dd04aa
[INFO] checking philipr-za/channel_thread_dropping_bug against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphilipr-za%2Fchannel_thread_dropping_bug" "/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/philipr-za/channel_thread_dropping_bug 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/philipr-za/channel_thread_dropping_bug
[INFO] finished tweaking git repo https://github.com/philipr-za/channel_thread_dropping_bug
[INFO] tweaked toml for git repo https://github.com/philipr-za/channel_thread_dropping_bug written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/philipr-za/channel_thread_dropping_bug 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] 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] de41135391461e5d659be69f473f74b5c90e3d36f9f28cbfcacaaf8e21209425
[INFO] running `Command { std: "docker" "start" "-a" "de41135391461e5d659be69f473f74b5c90e3d36f9f28cbfcacaaf8e21209425", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "de41135391461e5d659be69f473f74b5c90e3d36f9f28cbfcacaaf8e21209425", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de41135391461e5d659be69f473f74b5c90e3d36f9f28cbfcacaaf8e21209425", kill_on_drop: false }`
[INFO] [stdout] de41135391461e5d659be69f473f74b5c90e3d36f9f28cbfcacaaf8e21209425
[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] ed253e03f4de9721670958e75756a0ce4f4a09771a15cb0e4efa54f4252c7349
[INFO] running `Command { std: "docker" "start" "-a" "ed253e03f4de9721670958e75756a0ce4f4a09771a15cb0e4efa54f4252c7349", kill_on_drop: false }`
[INFO] [stderr]     Checking channel_thread_dropping_bug v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "ed253e03f4de9721670958e75756a0ce4f4a09771a15cb0e4efa54f4252c7349", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed253e03f4de9721670958e75756a0ce4f4a09771a15cb0e4efa54f4252c7349", kill_on_drop: false }`
[INFO] [stdout] ed253e03f4de9721670958e75756a0ce4f4a09771a15cb0e4efa54f4252c7349
[INFO] checking philipr-za/channel_thread_dropping_bug against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fphilipr-za%2Fchannel_thread_dropping_bug" "/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/philipr-za/channel_thread_dropping_bug on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/philipr-za/channel_thread_dropping_bug
[INFO] finished tweaking git repo https://github.com/philipr-za/channel_thread_dropping_bug
[INFO] tweaked toml for git repo https://github.com/philipr-za/channel_thread_dropping_bug written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/philipr-za/channel_thread_dropping_bug 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c09df5d7eb4212431f900e7cb064da1d3a7f4fdf3c4d1a36f203f36de76bba1f
[INFO] running `Command { std: "docker" "start" "-a" "c09df5d7eb4212431f900e7cb064da1d3a7f4fdf3c4d1a36f203f36de76bba1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c09df5d7eb4212431f900e7cb064da1d3a7f4fdf3c4d1a36f203f36de76bba1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c09df5d7eb4212431f900e7cb064da1d3a7f4fdf3c4d1a36f203f36de76bba1f", kill_on_drop: false }`
[INFO] [stdout] c09df5d7eb4212431f900e7cb064da1d3a7f4fdf3c4d1a36f203f36de76bba1f
[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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 33aa62b87cf75c579e910f86268e8673981c16e1a8f17f6394c7aa30aa96cc6f
[INFO] running `Command { std: "docker" "start" "-a" "33aa62b87cf75c579e910f86268e8673981c16e1a8f17f6394c7aa30aa96cc6f", kill_on_drop: false }`
[INFO] [stderr]     Checking channel_thread_dropping_bug v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.18s
[INFO] running `Command { std: "docker" "inspect" "33aa62b87cf75c579e910f86268e8673981c16e1a8f17f6394c7aa30aa96cc6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33aa62b87cf75c579e910f86268e8673981c16e1a8f17f6394c7aa30aa96cc6f", kill_on_drop: false }`
[INFO] [stdout] 33aa62b87cf75c579e910f86268e8673981c16e1a8f17f6394c7aa30aa96cc6f