[INFO] cloning repository https://github.com/anxiousmodernman/text-viewer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/anxiousmodernman/text-viewer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanxiousmodernman%2Ftext-viewer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanxiousmodernman%2Ftext-viewer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2f9efb6b1b62abfad0e4d701aa36740f5e577a0a
[INFO] checking anxiousmodernman/text-viewer against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanxiousmodernman%2Ftext-viewer" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/anxiousmodernman/text-viewer 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/anxiousmodernman/text-viewer
[INFO] finished tweaking git repo https://github.com/anxiousmodernman/text-viewer
[INFO] tweaked toml for git repo https://github.com/anxiousmodernman/text-viewer written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/anxiousmodernman/text-viewer 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]  Downloading crates ...
[INFO] [stderr]   Downloaded ropey v0.6.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 02857bf0662d926dca2a90876f20ff56e636d2a792dec0dca7b13b17f50a5e7e
[INFO] running `Command { std: "docker" "start" "-a" "02857bf0662d926dca2a90876f20ff56e636d2a792dec0dca7b13b17f50a5e7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "02857bf0662d926dca2a90876f20ff56e636d2a792dec0dca7b13b17f50a5e7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02857bf0662d926dca2a90876f20ff56e636d2a792dec0dca7b13b17f50a5e7e", kill_on_drop: false }`
[INFO] [stdout] 02857bf0662d926dca2a90876f20ff56e636d2a792dec0dca7b13b17f50a5e7e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 763f939b135e78c55e032b70fc2535ac9fe9d5047b38debd39433db9c4d5df54
[INFO] running `Command { std: "docker" "start" "-a" "763f939b135e78c55e032b70fc2535ac9fe9d5047b38debd39433db9c4d5df54", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-segmentation v1.2.0
[INFO] [stderr]     Checking smallvec v0.6.0
[INFO] [stderr]     Checking libc v0.2.36
[INFO] [stderr]     Checking ropey v0.6.3
[INFO] [stderr]     Checking termion v1.5.1
[INFO] [stderr]     Checking chat-program v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `Command { std: "docker" "inspect" "763f939b135e78c55e032b70fc2535ac9fe9d5047b38debd39433db9c4d5df54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "763f939b135e78c55e032b70fc2535ac9fe9d5047b38debd39433db9c4d5df54", kill_on_drop: false }`
[INFO] [stdout] 763f939b135e78c55e032b70fc2535ac9fe9d5047b38debd39433db9c4d5df54
[INFO] checking anxiousmodernman/text-viewer against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanxiousmodernman%2Ftext-viewer" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/anxiousmodernman/text-viewer 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/anxiousmodernman/text-viewer
[INFO] finished tweaking git repo https://github.com/anxiousmodernman/text-viewer
[INFO] tweaked toml for git repo https://github.com/anxiousmodernman/text-viewer written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/anxiousmodernman/text-viewer 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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 3018348c9b9d22ed3ddd1fc8f60674d429f490ffc2c1cbc4d11e2086f9c5827d
[INFO] running `Command { std: "docker" "start" "-a" "3018348c9b9d22ed3ddd1fc8f60674d429f490ffc2c1cbc4d11e2086f9c5827d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3018348c9b9d22ed3ddd1fc8f60674d429f490ffc2c1cbc4d11e2086f9c5827d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3018348c9b9d22ed3ddd1fc8f60674d429f490ffc2c1cbc4d11e2086f9c5827d", kill_on_drop: false }`
[INFO] [stdout] 3018348c9b9d22ed3ddd1fc8f60674d429f490ffc2c1cbc4d11e2086f9c5827d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 4892ea6e786723a409441abad47c243014af218d42ec066f0f5b57189c2b21d7
[INFO] running `Command { std: "docker" "start" "-a" "4892ea6e786723a409441abad47c243014af218d42ec066f0f5b57189c2b21d7", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-segmentation v1.2.0
[INFO] [stderr]     Checking libc v0.2.36
[INFO] [stderr]     Checking smallvec v0.6.0
[INFO] [stderr]     Checking ropey v0.6.3
[INFO] [stderr]     Checking termion v1.5.1
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/ropey-0.6.3/src/tree/node.rs:569:13
[INFO] [stdout]     |
[INFO] [stdout] 569 | /             if char_idx == end_char_idx - 1 {
[INFO] [stdout] 570 | |                 // Weird special-case: if the next chunk is only
[INFO] [stdout] 571 | |                 // one char long and is also the last chunk of the
[INFO] [stdout] 572 | |                 // rope.
[INFO] [stdout] ...   |
[INFO] [stdout] 577 | |                 return char_idx + count_chars(&chunk[..next_byte_idx]);
[INFO] [stdout] 578 | |             }
[INFO] [stdout]     | |_____________^ cannot satisfy `_ -> _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0284`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ropey` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "4892ea6e786723a409441abad47c243014af218d42ec066f0f5b57189c2b21d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4892ea6e786723a409441abad47c243014af218d42ec066f0f5b57189c2b21d7", kill_on_drop: false }`
[INFO] [stdout] 4892ea6e786723a409441abad47c243014af218d42ec066f0f5b57189c2b21d7