[INFO] cloning repository https://github.com/chc4/twist
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/chc4/twist" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchc4%2Ftwist", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchc4%2Ftwist'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6ebbf6c10beccee8dd1624385a0919f6344c844d
[INFO] checking chc4/twist against try#39e1293fce4b650061e85dda88aa428f726a8444 for pr-88041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchc4%2Ftwist" "/workspace/builds/worker-106/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-106/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/chc4/twist on toolchain 39e1293fce4b650061e85dda88aa428f726a8444
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/chc4/twist
[INFO] finished tweaking git repo https://github.com/chc4/twist
[INFO] tweaked toml for git repo https://github.com/chc4/twist written to /workspace/builds/worker-106/source/Cargo.toml
[INFO] crate git repo https://github.com/chc4/twist already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num-bigint v0.1.44
[INFO] [stderr]   Downloaded cc v1.0.66
[INFO] [stderr]   Downloaded ieee754 v0.2.6
[INFO] [stderr]   Downloaded ramp v0.5.9
[INFO] [stderr]   Downloaded dyn-clone v1.0.4
[INFO] [stderr]   Downloaded linkme-impl v0.2.6
[INFO] [stderr]   Downloaded linkme v0.2.6
[INFO] [stderr]   Downloaded libc v0.2.82
[INFO] [stderr]   Downloaded rustc-cfg v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-106/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-106/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0327baa7bab6cbb6bad88a3536ec2b8ca2b5ddfd1fbaabae7d23cf80a73e6192
[INFO] running `Command { std: "docker" "start" "-a" "0327baa7bab6cbb6bad88a3536ec2b8ca2b5ddfd1fbaabae7d23cf80a73e6192", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0327baa7bab6cbb6bad88a3536ec2b8ca2b5ddfd1fbaabae7d23cf80a73e6192", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0327baa7bab6cbb6bad88a3536ec2b8ca2b5ddfd1fbaabae7d23cf80a73e6192", kill_on_drop: false }`
[INFO] [stdout] 0327baa7bab6cbb6bad88a3536ec2b8ca2b5ddfd1fbaabae7d23cf80a73e6192
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-106/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-106/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 05bee3fcef8ea2f683d4cb86817042f3f3bdfd95b5972ad9a5e617a35f043d3e
[INFO] running `Command { std: "docker" "start" "-a" "05bee3fcef8ea2f683d4cb86817042f3f3bdfd95b5972ad9a5e617a35f043d3e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling cc v1.0.66
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling rustc-cfg v0.2.0
[INFO] [stderr]     Checking hamming v0.1.3
[INFO] [stderr]     Checking ieee754 v0.2.6
[INFO] [stderr]     Checking dyn-clone v1.0.4
[INFO] [stderr]    Compiling libc v0.2.82
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling ramp v0.5.9
[INFO] [stdout] error[E0199]: implementing the trait `Step` is not unsafe
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/ramp-0.5.9/src/int.rs:3697:1
[INFO] [stdout]      |
[INFO] [stdout] 3697 | / unsafe impl std::iter::Step for Int {
[INFO] [stdout] 3698 | |     fn steps_between(start: &Int, end: &Int) -> Option<usize> {
[INFO] [stdout] 3699 | |         let diff = (start - end).abs();
[INFO] [stdout] 3700 | |
[INFO] [stdout] ...    |
[INFO] [stdout] 3715 | |     }
[INFO] [stdout] 3716 | | }
[INFO] [stdout]      | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0199`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ramp` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "05bee3fcef8ea2f683d4cb86817042f3f3bdfd95b5972ad9a5e617a35f043d3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05bee3fcef8ea2f683d4cb86817042f3f3bdfd95b5972ad9a5e617a35f043d3e", kill_on_drop: false }`
[INFO] [stdout] 05bee3fcef8ea2f683d4cb86817042f3f3bdfd95b5972ad9a5e617a35f043d3e