[INFO] fetching crate practicegrep 0.1.0...
[INFO] building practicegrep-0.1.0 against master#ad85bc524b1ad696e42061ad8338d382dffbdbe5 for pr-146237-1
[INFO] extracting crate practicegrep 0.1.0 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate practicegrep 0.1.0
[INFO] finished tweaking crates.io crate practicegrep 0.1.0
[INFO] tweaked toml for crates.io crate practicegrep 0.1.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate practicegrep 0.1.0 on toolchain ad85bc524b1ad696e42061ad8338d382dffbdbe5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate practicegrep 0.1.0 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" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "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-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3f5f1915918d350e4080bfc5f3b213bcab83ca80e9b5ad420f86d06ef94ee3be
[INFO] running `Command { std: "docker" "start" "-a" "3f5f1915918d350e4080bfc5f3b213bcab83ca80e9b5ad420f86d06ef94ee3be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3f5f1915918d350e4080bfc5f3b213bcab83ca80e9b5ad420f86d06ef94ee3be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f5f1915918d350e4080bfc5f3b213bcab83ca80e9b5ad420f86d06ef94ee3be", kill_on_drop: false }`
[INFO] [stdout] 3f5f1915918d350e4080bfc5f3b213bcab83ca80e9b5ad420f86d06ef94ee3be
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e4c9d74fb91c1a253e65f64ffb4bd7472f17e9c7b503897a74c7229df1fe6df7
[INFO] running `Command { std: "docker" "start" "-a" "e4c9d74fb91c1a253e65f64ffb4bd7472f17e9c7b503897a74c7229df1fe6df7", kill_on_drop: false }`
[INFO] [stderr]    Compiling practicegrep v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `Command { std: "docker" "inspect" "e4c9d74fb91c1a253e65f64ffb4bd7472f17e9c7b503897a74c7229df1fe6df7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4c9d74fb91c1a253e65f64ffb4bd7472f17e9c7b503897a74c7229df1fe6df7", kill_on_drop: false }`
[INFO] [stdout] e4c9d74fb91c1a253e65f64ffb4bd7472f17e9c7b503897a74c7229df1fe6df7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f7f97ecb27c673b1e9244902b276510331075b2d204f9a80d97c7b4bc95a9a6c
[INFO] running `Command { std: "docker" "start" "-a" "f7f97ecb27c673b1e9244902b276510331075b2d204f9a80d97c7b4bc95a9a6c", kill_on_drop: false }`
[INFO] [stderr]    Compiling practicegrep v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `Command { std: "docker" "inspect" "f7f97ecb27c673b1e9244902b276510331075b2d204f9a80d97c7b4bc95a9a6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7f97ecb27c673b1e9244902b276510331075b2d204f9a80d97c7b4bc95a9a6c", kill_on_drop: false }`
[INFO] [stdout] f7f97ecb27c673b1e9244902b276510331075b2d204f9a80d97c7b4bc95a9a6c