[INFO] fetching crate rustack 0.1.0...
[INFO] testing rustack-0.1.0 against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210-2
[INFO] extracting crate rustack 0.1.0 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate rustack 0.1.0
[INFO] finished tweaking crates.io crate rustack 0.1.0
[INFO] tweaked toml for crates.io crate rustack 0.1.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rustack 0.1.0 on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rustack 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" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2ca1902c7587591c073018fc8edc8c226badbd0dd77e5ef519a0c2b200fbcc7c
[INFO] running `Command { std: "docker" "start" "-a" "2ca1902c7587591c073018fc8edc8c226badbd0dd77e5ef519a0c2b200fbcc7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2ca1902c7587591c073018fc8edc8c226badbd0dd77e5ef519a0c2b200fbcc7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ca1902c7587591c073018fc8edc8c226badbd0dd77e5ef519a0c2b200fbcc7c", kill_on_drop: false }`
[INFO] [stdout] 2ca1902c7587591c073018fc8edc8c226badbd0dd77e5ef519a0c2b200fbcc7c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2d1cb3807f9cb92e7ad6629287a48612c2f045cdc5eab38a02f85be16f177819
[INFO] running `Command { std: "docker" "start" "-a" "2d1cb3807f9cb92e7ad6629287a48612c2f045cdc5eab38a02f85be16f177819", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustack v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.20s
[INFO] running `Command { std: "docker" "inspect" "2d1cb3807f9cb92e7ad6629287a48612c2f045cdc5eab38a02f85be16f177819", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d1cb3807f9cb92e7ad6629287a48612c2f045cdc5eab38a02f85be16f177819", kill_on_drop: false }`
[INFO] [stdout] 2d1cb3807f9cb92e7ad6629287a48612c2f045cdc5eab38a02f85be16f177819
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6faa74575721de03a830166d618024e12fa633428b0945b3a60de1692206e887
[INFO] running `Command { std: "docker" "start" "-a" "6faa74575721de03a830166d618024e12fa633428b0945b3a60de1692206e887", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustack v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `Command { std: "docker" "inspect" "6faa74575721de03a830166d618024e12fa633428b0945b3a60de1692206e887", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6faa74575721de03a830166d618024e12fa633428b0945b3a60de1692206e887", kill_on_drop: false }`
[INFO] [stdout] 6faa74575721de03a830166d618024e12fa633428b0945b3a60de1692206e887
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 265f27ee209c3a735af7492fef9253805fc5e06c3f0d2392b274cdb69ba848b0
[INFO] running `Command { std: "docker" "start" "-a" "265f27ee209c3a735af7492fef9253805fc5e06c3f0d2392b274cdb69ba848b0", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rustack-a65616bea77f98d2)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::stack_operations ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rustack
[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" "265f27ee209c3a735af7492fef9253805fc5e06c3f0d2392b274cdb69ba848b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "265f27ee209c3a735af7492fef9253805fc5e06c3f0d2392b274cdb69ba848b0", kill_on_drop: false }`
[INFO] [stdout] 265f27ee209c3a735af7492fef9253805fc5e06c3f0d2392b274cdb69ba848b0