[INFO] fetching crate single_value_channel 1.2.2...
[INFO] testing single_value_channel-1.2.2 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate single_value_channel 1.2.2 into /workspace/builds/worker-31/source
[INFO] validating manifest of crates.io crate single_value_channel 1.2.2 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate single_value_channel 1.2.2
[INFO] finished tweaking crates.io crate single_value_channel 1.2.2
[INFO] tweaked toml for crates.io crate single_value_channel 1.2.2 written to /workspace/builds/worker-31/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "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-31/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0d1988768a4f4e1bbd4c206d999d615fa73c404f119c5ee000b62df45f235868
[INFO] running `Command { std: "docker" "start" "-a" "0d1988768a4f4e1bbd4c206d999d615fa73c404f119c5ee000b62df45f235868", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0d1988768a4f4e1bbd4c206d999d615fa73c404f119c5ee000b62df45f235868", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d1988768a4f4e1bbd4c206d999d615fa73c404f119c5ee000b62df45f235868", kill_on_drop: false }`
[INFO] [stdout] 0d1988768a4f4e1bbd4c206d999d615fa73c404f119c5ee000b62df45f235868
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a1f86affe4bfe564ff69dea2ce8bf9d59ecc61b953187c50d5fe5f3e2c019e05
[INFO] running `Command { std: "docker" "start" "-a" "a1f86affe4bfe564ff69dea2ce8bf9d59ecc61b953187c50d5fe5f3e2c019e05", kill_on_drop: false }`
[INFO] [stderr]    Compiling single_value_channel v1.2.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.87s
[INFO] running `Command { std: "docker" "inspect" "a1f86affe4bfe564ff69dea2ce8bf9d59ecc61b953187c50d5fe5f3e2c019e05", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1f86affe4bfe564ff69dea2ce8bf9d59ecc61b953187c50d5fe5f3e2c019e05", kill_on_drop: false }`
[INFO] [stdout] a1f86affe4bfe564ff69dea2ce8bf9d59ecc61b953187c50d5fe5f3e2c019e05
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bef8ad39da5e1e11c698d41fb9589c4b4e3cd2d01d982b75c4be19e6ee91524c
[INFO] running `Command { std: "docker" "start" "-a" "bef8ad39da5e1e11c698d41fb9589c4b4e3cd2d01d982b75c4be19e6ee91524c", kill_on_drop: false }`
[INFO] [stderr]    Compiling single_value_channel v1.2.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.88s
[INFO] running `Command { std: "docker" "inspect" "bef8ad39da5e1e11c698d41fb9589c4b4e3cd2d01d982b75c4be19e6ee91524c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bef8ad39da5e1e11c698d41fb9589c4b4e3cd2d01d982b75c4be19e6ee91524c", kill_on_drop: false }`
[INFO] [stdout] bef8ad39da5e1e11c698d41fb9589c4b4e3cd2d01d982b75c4be19e6ee91524c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-31/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 89873dd31b174bfa045acdf311d00836ab64bca81a9af3710df4fd42757cd34b
[INFO] running `Command { std: "docker" "start" "-a" "89873dd31b174bfa045acdf311d00836ab64bca81a9af3710df4fd42757cd34b", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/single_value_channel-80e07fe28dbaffcf)
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test test::latest_mut ... ok
[INFO] [stdout] test test::no_args_channel ... ok
[INFO] [stdout] test test::multiple_updaters ... ok
[INFO] [stdout] test test::receiver_has_no_updater ... ok
[INFO] [stdout] test test::concurrent_send_recv ... ok
[INFO] [stdout] test test::unwrap_non_debug ... ok
[INFO] [stdout] test test::send_recv_value ... ok
[INFO] [stdout] test test::updater_has_no_receiver ... ok
[INFO] [stdout] test test::send_recv_option ... ok
[INFO] [stderr]    Doc-tests single_value_channel
[INFO] [stdout] test test::error_writing_to_dead_reader ... ok
[INFO] [stdout] test test::non_blocking_write_during_read ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 18) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.50s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "89873dd31b174bfa045acdf311d00836ab64bca81a9af3710df4fd42757cd34b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "89873dd31b174bfa045acdf311d00836ab64bca81a9af3710df4fd42757cd34b", kill_on_drop: false }`
[INFO] [stdout] 89873dd31b174bfa045acdf311d00836ab64bca81a9af3710df4fd42757cd34b