[INFO] cloning repository https://github.com/girtsf/rust-ff
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/girtsf/rust-ff" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgirtsf%2Frust-ff", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgirtsf%2Frust-ff'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 63af8f8524994e6b7e2f0b6332ebc311287be1a6
[INFO] checking girtsf/rust-ff against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgirtsf%2Frust-ff" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/girtsf/rust-ff on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/girtsf/rust-ff
[INFO] finished tweaking git repo https://github.com/girtsf/rust-ff
[INFO] tweaked toml for git repo https://github.com/girtsf/rust-ff written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/girtsf/rust-ff 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded walkdir v2.1.4
[INFO] [stderr]   Downloaded same-file v1.0.2
[INFO] [stderr]   Downloaded colored v1.6.0
[INFO] [stderr]   Downloaded isatty v0.1.7
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3900516aa2eb34a66cccbd2c0b3e6a16b974062532d0fae61ff34a2c0f487c01
[INFO] running `Command { std: "docker" "start" "-a" "3900516aa2eb34a66cccbd2c0b3e6a16b974062532d0fae61ff34a2c0f487c01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3900516aa2eb34a66cccbd2c0b3e6a16b974062532d0fae61ff34a2c0f487c01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3900516aa2eb34a66cccbd2c0b3e6a16b974062532d0fae61ff34a2c0f487c01", kill_on_drop: false }`
[INFO] [stdout] 3900516aa2eb34a66cccbd2c0b3e6a16b974062532d0fae61ff34a2c0f487c01
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ca34f3aabcf90c3a0d0d9f10bb5763843dc6d0b575703fcc1b4ef3f56175bfeb
[INFO] running `Command { std: "docker" "start" "-a" "ca34f3aabcf90c3a0d0d9f10bb5763843dc6d0b575703fcc1b4ef3f56175bfeb", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.40
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking unicode-width v0.1.4
[INFO] [stderr]    Compiling regex v1.0.0
[INFO] [stderr]     Checking lazy_static v1.0.0
[INFO] [stderr]     Checking ucd-util v0.1.1
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking utf8-ranges v1.0.0
[INFO] [stderr]     Checking same-file v1.0.2
[INFO] [stderr]     Checking vec_map v0.8.0
[INFO] [stderr]     Checking bitflags v1.0.3
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking textwrap v0.9.0
[INFO] [stderr]     Checking colored v1.6.0
[INFO] [stderr]     Checking thread_local v0.3.5
[INFO] [stderr]     Checking regex-syntax v0.6.0
[INFO] [stderr]     Checking walkdir v2.1.4
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking atty v0.2.10
[INFO] [stderr]     Checking isatty v0.1.7
[INFO] [stderr]     Checking aho-corasick v0.6.4
[INFO] [stderr]     Checking clap v2.31.2
[INFO] [stderr]     Checking ff v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.88s
[INFO] running `Command { std: "docker" "inspect" "ca34f3aabcf90c3a0d0d9f10bb5763843dc6d0b575703fcc1b4ef3f56175bfeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca34f3aabcf90c3a0d0d9f10bb5763843dc6d0b575703fcc1b4ef3f56175bfeb", kill_on_drop: false }`
[INFO] [stdout] ca34f3aabcf90c3a0d0d9f10bb5763843dc6d0b575703fcc1b4ef3f56175bfeb