[INFO] fetching crate katwalk 0.0.12...
[INFO] checking katwalk-0.0.12 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate katwalk 0.0.12 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate katwalk 0.0.12 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 crates.io crate katwalk 0.0.12
[INFO] finished tweaking crates.io crate katwalk 0.0.12
[INFO] tweaked toml for crates.io crate katwalk 0.0.12 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 2 packages
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 1b5b5eb0326a1e5042d430380326e46bb766e143395781d9648f9498dedfe572
[INFO] running `Command { std: "docker" "start" "-a" "1b5b5eb0326a1e5042d430380326e46bb766e143395781d9648f9498dedfe572", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b5b5eb0326a1e5042d430380326e46bb766e143395781d9648f9498dedfe572", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b5b5eb0326a1e5042d430380326e46bb766e143395781d9648f9498dedfe572", kill_on_drop: false }`
[INFO] [stdout] 1b5b5eb0326a1e5042d430380326e46bb766e143395781d9648f9498dedfe572
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 3ab1a3de059b275bfa584230d0e8469c15150c0b3b1837e6f2b69c20ffea8012
[INFO] running `Command { std: "docker" "start" "-a" "3ab1a3de059b275bfa584230d0e8469c15150c0b3b1837e6f2b69c20ffea8012", kill_on_drop: false }`
[INFO] [stderr]     Checking katwalk v0.0.12 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "3ab1a3de059b275bfa584230d0e8469c15150c0b3b1837e6f2b69c20ffea8012", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ab1a3de059b275bfa584230d0e8469c15150c0b3b1837e6f2b69c20ffea8012", kill_on_drop: false }`
[INFO] [stdout] 3ab1a3de059b275bfa584230d0e8469c15150c0b3b1837e6f2b69c20ffea8012
[INFO] checking katwalk-0.0.12 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate katwalk 0.0.12 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate katwalk 0.0.12 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 crates.io crate katwalk 0.0.12
[INFO] finished tweaking crates.io crate katwalk 0.0.12
[INFO] tweaked toml for crates.io crate katwalk 0.0.12 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 5e1f5ff54170871854477f33f9b34daa2f1673957cce3483995b0bcf957d574e
[INFO] running `Command { std: "docker" "start" "-a" "5e1f5ff54170871854477f33f9b34daa2f1673957cce3483995b0bcf957d574e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5e1f5ff54170871854477f33f9b34daa2f1673957cce3483995b0bcf957d574e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e1f5ff54170871854477f33f9b34daa2f1673957cce3483995b0bcf957d574e", kill_on_drop: false }`
[INFO] [stdout] 5e1f5ff54170871854477f33f9b34daa2f1673957cce3483995b0bcf957d574e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 4dcc705fa7cd76ea018696bd26d8224405e8d71a30302e94a7a4cd447e41c644
[INFO] running `Command { std: "docker" "start" "-a" "4dcc705fa7cd76ea018696bd26d8224405e8d71a30302e94a7a4cd447e41c644", kill_on_drop: false }`
[INFO] [stderr]     Checking katwalk v0.0.12 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> src/lib.rs:537:27
[INFO] [stdout]     |
[INFO] [stdout] 537 |                   Err(e) => match e {
[INFO] [stdout]     |  ___________________________^
[INFO] [stdout] 538 | |                     ReadResult::ReadDone => return None,
[INFO] [stdout] 539 | |                     ReadResult::ReadError | ReadResult::ReadMore => {
[INFO] [stdout] 540 | |                         panic!("Error occured while reading {}", e as u64)
[INFO] [stdout] 541 | |                     }
[INFO] [stdout] 542 | |                 },
[INFO] [stdout]     | |_________________^ cannot satisfy `_ -> _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> src/lib.rs:537:27
[INFO] [stdout]     |
[INFO] [stdout] 537 |                   Err(e) => match e {
[INFO] [stdout]     |  ___________________________^
[INFO] [stdout] 538 | |                     ReadResult::ReadDone => return None,
[INFO] [stdout] 539 | |                     ReadResult::ReadError | ReadResult::ReadMore => {
[INFO] [stdout] 540 | |                         panic!("Error occured while reading {}", e as u64)
[INFO] [stdout] 541 | |                     }
[INFO] [stdout] 542 | |                 },
[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 `katwalk` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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 `katwalk` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "4dcc705fa7cd76ea018696bd26d8224405e8d71a30302e94a7a4cd447e41c644", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4dcc705fa7cd76ea018696bd26d8224405e8d71a30302e94a7a4cd447e41c644", kill_on_drop: false }`
[INFO] [stdout] 4dcc705fa7cd76ea018696bd26d8224405e8d71a30302e94a7a4cd447e41c644