[INFO] fetching crate metrics-core 0.5.2...
[INFO] testing metrics-core-0.5.2 against try#8262275854dc0e5381c9d42d56257d94932c5a87 for pr-90799
[INFO] extracting crate metrics-core 0.5.2 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate metrics-core 0.5.2 on toolchain 8262275854dc0e5381c9d42d56257d94932c5a87
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate metrics-core 0.5.2
[INFO] finished tweaking crates.io crate metrics-core 0.5.2
[INFO] tweaked toml for crates.io crate metrics-core 0.5.2 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "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-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 437478cb2830221b0413e807a5d8e9134abf88c95a606b0e542aa01ff2876c3b
[INFO] running `Command { std: "docker" "start" "-a" "437478cb2830221b0413e807a5d8e9134abf88c95a606b0e542aa01ff2876c3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "437478cb2830221b0413e807a5d8e9134abf88c95a606b0e542aa01ff2876c3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "437478cb2830221b0413e807a5d8e9134abf88c95a606b0e542aa01ff2876c3b", kill_on_drop: false }`
[INFO] [stdout] 437478cb2830221b0413e807a5d8e9134abf88c95a606b0e542aa01ff2876c3b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 36453bf9c1b1a6facb8bc06a592d20c5887775ed601894abeac2ad9f5b250bd6
[INFO] running `Command { std: "docker" "start" "-a" "36453bf9c1b1a6facb8bc06a592d20c5887775ed601894abeac2ad9f5b250bd6", kill_on_drop: false }`
[INFO] [stderr]    Compiling metrics-core v0.5.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.60s
[INFO] running `Command { std: "docker" "inspect" "36453bf9c1b1a6facb8bc06a592d20c5887775ed601894abeac2ad9f5b250bd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36453bf9c1b1a6facb8bc06a592d20c5887775ed601894abeac2ad9f5b250bd6", kill_on_drop: false }`
[INFO] [stdout] 36453bf9c1b1a6facb8bc06a592d20c5887775ed601894abeac2ad9f5b250bd6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d505b6735703d1d87bc35234b724b9f4015973b48c834860f6e6a0f10e73a4cb
[INFO] running `Command { std: "docker" "start" "-a" "d505b6735703d1d87bc35234b724b9f4015973b48c834860f6e6a0f10e73a4cb", kill_on_drop: false }`
[INFO] [stderr]    Compiling metrics-core v0.5.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `Command { std: "docker" "inspect" "d505b6735703d1d87bc35234b724b9f4015973b48c834860f6e6a0f10e73a4cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d505b6735703d1d87bc35234b724b9f4015973b48c834860f6e6a0f10e73a4cb", kill_on_drop: false }`
[INFO] [stdout] d505b6735703d1d87bc35234b724b9f4015973b48c834860f6e6a0f10e73a4cb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c248a63ee6788fbe62353a763b2b1492e2fabf88c8a6b8bf6b193124c1ac446e
[INFO] running `Command { std: "docker" "start" "-a" "c248a63ee6788fbe62353a763b2b1492e2fabf88c8a6b8bf6b193124c1ac446e", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/metrics_core-d4023c4e3449e860)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests metrics-core
[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] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - labels (line 321) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.58s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c248a63ee6788fbe62353a763b2b1492e2fabf88c8a6b8bf6b193124c1ac446e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c248a63ee6788fbe62353a763b2b1492e2fabf88c8a6b8bf6b193124c1ac446e", kill_on_drop: false }`
[INFO] [stdout] c248a63ee6788fbe62353a763b2b1492e2fabf88c8a6b8bf6b193124c1ac446e