[INFO] cloning repository https://github.com/gdelazzer/file_grouper
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gdelazzer/file_grouper" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgdelazzer%2Ffile_grouper", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgdelazzer%2Ffile_grouper'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8713596964811b51e7cd72cec544eb211149afb5
[INFO] checking gdelazzer/file_grouper against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgdelazzer%2Ffile_grouper" "/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/gdelazzer/file_grouper on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/gdelazzer/file_grouper
[INFO] finished tweaking git repo https://github.com/gdelazzer/file_grouper
[INFO] tweaked toml for git repo https://github.com/gdelazzer/file_grouper written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/gdelazzer/file_grouper 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded argparse v0.2.2
[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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dcd191d0a92373b9f055a3d77ef6ddfd26bbf2767e0601a073fdba2cf19d601d
[INFO] running `Command { std: "docker" "start" "-a" "dcd191d0a92373b9f055a3d77ef6ddfd26bbf2767e0601a073fdba2cf19d601d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dcd191d0a92373b9f055a3d77ef6ddfd26bbf2767e0601a073fdba2cf19d601d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dcd191d0a92373b9f055a3d77ef6ddfd26bbf2767e0601a073fdba2cf19d601d", kill_on_drop: false }`
[INFO] [stdout] dcd191d0a92373b9f055a3d77ef6ddfd26bbf2767e0601a073fdba2cf19d601d
[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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 23eb3ae22ee83ed91c7b551b4a6f92934aae76d643a5a6736bc1f42ae750ec41
[INFO] running `Command { std: "docker" "start" "-a" "23eb3ae22ee83ed91c7b551b4a6f92934aae76d643a5a6736bc1f42ae750ec41", kill_on_drop: false }`
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]     Checking argparse v0.2.2
[INFO] [stderr]     Checking file_grouper v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `Command { std: "docker" "inspect" "23eb3ae22ee83ed91c7b551b4a6f92934aae76d643a5a6736bc1f42ae750ec41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23eb3ae22ee83ed91c7b551b4a6f92934aae76d643a5a6736bc1f42ae750ec41", kill_on_drop: false }`
[INFO] [stdout] 23eb3ae22ee83ed91c7b551b4a6f92934aae76d643a5a6736bc1f42ae750ec41
[INFO] checking gdelazzer/file_grouper against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgdelazzer%2Ffile_grouper" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gdelazzer/file_grouper on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/gdelazzer/file_grouper
[INFO] finished tweaking git repo https://github.com/gdelazzer/file_grouper
[INFO] tweaked toml for git repo https://github.com/gdelazzer/file_grouper written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/gdelazzer/file_grouper 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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8fb052c3a3ca1078e3691c650aaa713f440da63f257635bd74921bed5fededc7
[INFO] running `Command { std: "docker" "start" "-a" "8fb052c3a3ca1078e3691c650aaa713f440da63f257635bd74921bed5fededc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8fb052c3a3ca1078e3691c650aaa713f440da63f257635bd74921bed5fededc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fb052c3a3ca1078e3691c650aaa713f440da63f257635bd74921bed5fededc7", kill_on_drop: false }`
[INFO] [stdout] 8fb052c3a3ca1078e3691c650aaa713f440da63f257635bd74921bed5fededc7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2b6ec12c1c08413ed2120eb89fe0016963992fdb38184c03e22a82477db1c26b
[INFO] running `Command { std: "docker" "start" "-a" "2b6ec12c1c08413ed2120eb89fe0016963992fdb38184c03e22a82477db1c26b", kill_on_drop: false }`
[INFO] [stderr]     Checking argparse v0.2.2
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/argparse-0.2.2/src/parser.rs:206:18
[INFO] [stdout]     |
[INFO] [stdout] 206 |             _ => panic!(),
[INFO] [stdout]     |                  ^^^^^^^^ cannot satisfy `_ -> _`
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `$crate::panic::panic_2015` which comes from the expansion of the macro `panic` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/argparse-0.2.2/src/parser.rs:340:29
[INFO] [stdout]     |
[INFO] [stdout] 340 |                       None => match self.parser.catchall_argument {
[INFO] [stdout]     |  _____________________________^
[INFO] [stdout] 341 | |                         Some(ref option) => {
[INFO] [stdout] 342 | |                             opt = option;
[INFO] [stdout] 343 | |                             break;
[INFO] [stdout] ...   |
[INFO] [stdout] 346 | |                             "Unexpected argument {}", arg)),
[INFO] [stdout] 347 | |                     }
[INFO] [stdout]     | |_____________________^ cannot satisfy `_ -> _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/argparse-0.2.2/src/parser.rs:809:22
[INFO] [stdout]     |
[INFO] [stdout] 809 |             .map_err(|c| exit(c))
[INFO] [stdout]     |                      ^^^
[INFO] [stdout]     |
[INFO] [stdout] help: try giving this closure an explicit return type
[INFO] [stdout]     |
[INFO] [stdout] 809 |             .map_err(|c| -> /* Type */ { exit(c) })
[INFO] [stdout]     |                          +++++++++++++++         +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0282, E0284.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `argparse` (lib) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "2b6ec12c1c08413ed2120eb89fe0016963992fdb38184c03e22a82477db1c26b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b6ec12c1c08413ed2120eb89fe0016963992fdb38184c03e22a82477db1c26b", kill_on_drop: false }`
[INFO] [stdout] 2b6ec12c1c08413ed2120eb89fe0016963992fdb38184c03e22a82477db1c26b