[INFO] fetching crate reverse_differentiable 0.1.2...
[INFO] building reverse_differentiable-0.1.2 against master#461e8078010433ff7de2db2aaae8a3cfb0847215 for pr-94962
[INFO] extracting crate reverse_differentiable 0.1.2 into /workspace/builds/worker-92/source
[INFO] validating manifest of crates.io crate reverse_differentiable 0.1.2 on toolchain 461e8078010433ff7de2db2aaae8a3cfb0847215
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+461e8078010433ff7de2db2aaae8a3cfb0847215" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate reverse_differentiable 0.1.2
[INFO] finished tweaking crates.io crate reverse_differentiable 0.1.2
[INFO] tweaked toml for crates.io crate reverse_differentiable 0.1.2 written to /workspace/builds/worker-92/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+461e8078010433ff7de2db2aaae8a3cfb0847215" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+461e8078010433ff7de2db2aaae8a3cfb0847215" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/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@sha256:1ede1414886370302e694df474b9877c02906499f04c196936ce0973d30c5eaa" "/opt/rustwide/cargo-home/bin/cargo" "+461e8078010433ff7de2db2aaae8a3cfb0847215" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ffaab7f3adfd3378af961d9c847239291d461e3b3f90b74965cbe93604457a9c
[INFO] running `Command { std: "docker" "start" "-a" "ffaab7f3adfd3378af961d9c847239291d461e3b3f90b74965cbe93604457a9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ffaab7f3adfd3378af961d9c847239291d461e3b3f90b74965cbe93604457a9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ffaab7f3adfd3378af961d9c847239291d461e3b3f90b74965cbe93604457a9c", kill_on_drop: false }`
[INFO] [stdout] ffaab7f3adfd3378af961d9c847239291d461e3b3f90b74965cbe93604457a9c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/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@sha256:1ede1414886370302e694df474b9877c02906499f04c196936ce0973d30c5eaa" "/opt/rustwide/cargo-home/bin/cargo" "+461e8078010433ff7de2db2aaae8a3cfb0847215" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f605d09e8efccc44972efe320aa7abe7e79739bd9b9df36f4e17a10937e227aa
[INFO] running `Command { std: "docker" "start" "-a" "f605d09e8efccc44972efe320aa7abe7e79739bd9b9df36f4e17a10937e227aa", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.89
[INFO] [stderr]    Compiling quote v1.0.16
[INFO] [stderr]    Compiling reverse_differentiable v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 25s
[INFO] running `Command { std: "docker" "inspect" "f605d09e8efccc44972efe320aa7abe7e79739bd9b9df36f4e17a10937e227aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f605d09e8efccc44972efe320aa7abe7e79739bd9b9df36f4e17a10937e227aa", kill_on_drop: false }`
[INFO] [stdout] f605d09e8efccc44972efe320aa7abe7e79739bd9b9df36f4e17a10937e227aa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-92/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@sha256:1ede1414886370302e694df474b9877c02906499f04c196936ce0973d30c5eaa" "/opt/rustwide/cargo-home/bin/cargo" "+461e8078010433ff7de2db2aaae8a3cfb0847215" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 22c334e626112c3e5a3d01421dae5da08c71504728403a5db7ee69f039481d95
[INFO] running `Command { std: "docker" "start" "-a" "22c334e626112c3e5a3d01421dae5da08c71504728403a5db7ee69f039481d95", kill_on_drop: false }`
[INFO] [stderr]    Compiling reverse_differentiable v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.35s
[INFO] [stderr]   Executable unittests src/lib.rs (/opt/rustwide/target/debug/deps/reverse_differentiable-3f9ba20b8f7b17d7)
[INFO] running `Command { std: "docker" "inspect" "22c334e626112c3e5a3d01421dae5da08c71504728403a5db7ee69f039481d95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22c334e626112c3e5a3d01421dae5da08c71504728403a5db7ee69f039481d95", kill_on_drop: false }`
[INFO] [stdout] 22c334e626112c3e5a3d01421dae5da08c71504728403a5db7ee69f039481d95