[INFO] fetching crate backtrace-on-stack-overflow 0.1.1...
[INFO] testing backtrace-on-stack-overflow-0.1.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate backtrace-on-stack-overflow 0.1.1 into /workspace/builds/worker-78/source
[INFO] validating manifest of crates.io crate backtrace-on-stack-overflow 0.1.1 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate backtrace-on-stack-overflow 0.1.1
[INFO] finished tweaking crates.io crate backtrace-on-stack-overflow 0.1.1
[INFO] tweaked toml for crates.io crate backtrace-on-stack-overflow 0.1.1 written to /workspace/builds/worker-78/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c5f64710966061a4b7dd356c310e76d4f222b944fde9c812eef2cb1d8ed7fb30
[INFO] running `Command { std: "docker" "start" "-a" "c5f64710966061a4b7dd356c310e76d4f222b944fde9c812eef2cb1d8ed7fb30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c5f64710966061a4b7dd356c310e76d4f222b944fde9c812eef2cb1d8ed7fb30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5f64710966061a4b7dd356c310e76d4f222b944fde9c812eef2cb1d8ed7fb30", kill_on_drop: false }`
[INFO] [stdout] c5f64710966061a4b7dd356c310e76d4f222b944fde9c812eef2cb1d8ed7fb30
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 35f477324ce8760d31dd659d837961b33736b21f7e6fa124c08e4c290f58e915
[INFO] running `Command { std: "docker" "start" "-a" "35f477324ce8760d31dd659d837961b33736b21f7e6fa124c08e4c290f58e915", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling object v0.26.2
[INFO] [stderr]    Compiling nix v0.19.1
[INFO] [stderr]    Compiling backtrace v0.3.61
[INFO] [stderr]    Compiling backtrace-on-stack-overflow v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.35s
[INFO] running `Command { std: "docker" "inspect" "35f477324ce8760d31dd659d837961b33736b21f7e6fa124c08e4c290f58e915", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35f477324ce8760d31dd659d837961b33736b21f7e6fa124c08e4c290f58e915", kill_on_drop: false }`
[INFO] [stdout] 35f477324ce8760d31dd659d837961b33736b21f7e6fa124c08e4c290f58e915
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3d13778eda63116c992aea19bb8b5e88db1da6d537c4a698306955c9c21908c8
[INFO] running `Command { std: "docker" "start" "-a" "3d13778eda63116c992aea19bb8b5e88db1da6d537c4a698306955c9c21908c8", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling backtrace-on-stack-overflow v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.03s
[INFO] running `Command { std: "docker" "inspect" "3d13778eda63116c992aea19bb8b5e88db1da6d537c4a698306955c9c21908c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d13778eda63116c992aea19bb8b5e88db1da6d537c4a698306955c9c21908c8", kill_on_drop: false }`
[INFO] [stdout] 3d13778eda63116c992aea19bb8b5e88db1da6d537c4a698306955c9c21908c8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f5eb1ceca14f409bf4687eb385dc7806e2deb6822618242f2d0bc6fd84ca353b
[INFO] running `Command { std: "docker" "start" "-a" "f5eb1ceca14f409bf4687eb385dc7806e2deb6822618242f2d0bc6fd84ca353b", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.13s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/backtrace_on_stack_overflow-e8b708850e0f7ee9)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests backtrace-on-stack-overflow
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f5eb1ceca14f409bf4687eb385dc7806e2deb6822618242f2d0bc6fd84ca353b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5eb1ceca14f409bf4687eb385dc7806e2deb6822618242f2d0bc6fd84ca353b", kill_on_drop: false }`
[INFO] [stdout] f5eb1ceca14f409bf4687eb385dc7806e2deb6822618242f2d0bc6fd84ca353b