[INFO] fetching crate mark_last 0.9.2...
[INFO] testing mark_last-0.9.2 against try#8262275854dc0e5381c9d42d56257d94932c5a87 for pr-90799
[INFO] extracting crate mark_last 0.9.2 into /workspace/builds/worker-47/source
[INFO] validating manifest of crates.io crate mark_last 0.9.2 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 mark_last 0.9.2
[INFO] finished tweaking crates.io crate mark_last 0.9.2
[INFO] tweaked toml for crates.io crate mark_last 0.9.2 written to /workspace/builds/worker-47/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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/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] 2bb96ebff81a8ec282e008d8634dab7bcfa378aecced2e095ed8fc41ad0a68ef
[INFO] running `Command { std: "docker" "start" "-a" "2bb96ebff81a8ec282e008d8634dab7bcfa378aecced2e095ed8fc41ad0a68ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2bb96ebff81a8ec282e008d8634dab7bcfa378aecced2e095ed8fc41ad0a68ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2bb96ebff81a8ec282e008d8634dab7bcfa378aecced2e095ed8fc41ad0a68ef", kill_on_drop: false }`
[INFO] [stdout] 2bb96ebff81a8ec282e008d8634dab7bcfa378aecced2e095ed8fc41ad0a68ef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/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] 9649c204af3a8a9e8e95ec769dea8223d1bd94603bfadcb66fcded60a1f6e136
[INFO] running `Command { std: "docker" "start" "-a" "9649c204af3a8a9e8e95ec769dea8223d1bd94603bfadcb66fcded60a1f6e136", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling mark_last v0.9.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.46s
[INFO] running `Command { std: "docker" "inspect" "9649c204af3a8a9e8e95ec769dea8223d1bd94603bfadcb66fcded60a1f6e136", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9649c204af3a8a9e8e95ec769dea8223d1bd94603bfadcb66fcded60a1f6e136", kill_on_drop: false }`
[INFO] [stdout] 9649c204af3a8a9e8e95ec769dea8223d1bd94603bfadcb66fcded60a1f6e136
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/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] 382b581238d79d183d359b73361564965baf8a8965f55eeb8530bbe05b4e867f
[INFO] running `Command { std: "docker" "start" "-a" "382b581238d79d183d359b73361564965baf8a8965f55eeb8530bbe05b4e867f", kill_on_drop: false }`
[INFO] [stderr]    Compiling mark_last v0.9.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "382b581238d79d183d359b73361564965baf8a8965f55eeb8530bbe05b4e867f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "382b581238d79d183d359b73361564965baf8a8965f55eeb8530bbe05b4e867f", kill_on_drop: false }`
[INFO] [stdout] 382b581238d79d183d359b73361564965baf8a8965f55eeb8530bbe05b4e867f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/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] 2d7ac123009aea54f960b0facd004ab06d43b7daa649827b4f23af6d77cc6bba
[INFO] running `Command { std: "docker" "start" "-a" "2d7ac123009aea54f960b0facd004ab06d43b7daa649827b4f23af6d77cc6bba", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/mark_last-9df9bc13eb5e8732)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test test::empty_collection ... ok
[INFO] [stdout] test test::marks_last ... ok
[INFO] [stdout] test test::marks_last_length_one ... ok
[INFO] [stdout] test test::marks_nothing_infinite ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.16s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests mark_last
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - MarkLastIterator::mark_last (line 40) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.56s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "2d7ac123009aea54f960b0facd004ab06d43b7daa649827b4f23af6d77cc6bba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d7ac123009aea54f960b0facd004ab06d43b7daa649827b4f23af6d77cc6bba", kill_on_drop: false }`
[INFO] [stdout] 2d7ac123009aea54f960b0facd004ab06d43b7daa649827b4f23af6d77cc6bba