[INFO] fetching crate coredump 0.1.2...
[INFO] checking coredump-0.1.2 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate coredump 0.1.2 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate coredump 0.1.2 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 coredump 0.1.2
[INFO] finished tweaking crates.io crate coredump 0.1.2
[INFO] tweaked toml for crates.io crate coredump 0.1.2 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] 44d6c7e785a74f22b9c0deac423cf965a36f4c83b271cb80db75f58aeba1d50c
[INFO] running `Command { std: "docker" "start" "-a" "44d6c7e785a74f22b9c0deac423cf965a36f4c83b271cb80db75f58aeba1d50c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "44d6c7e785a74f22b9c0deac423cf965a36f4c83b271cb80db75f58aeba1d50c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "44d6c7e785a74f22b9c0deac423cf965a36f4c83b271cb80db75f58aeba1d50c", kill_on_drop: false }`
[INFO] [stdout] 44d6c7e785a74f22b9c0deac423cf965a36f4c83b271cb80db75f58aeba1d50c
[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] 76028050ff572d1cab578d70858e4c550f1011e7494d4911fc2612263c0b3452
[INFO] running `Command { std: "docker" "start" "-a" "76028050ff572d1cab578d70858e4c550f1011e7494d4911fc2612263c0b3452", kill_on_drop: false }`
[INFO] [stderr]     Checking coredump v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] running `Command { std: "docker" "inspect" "76028050ff572d1cab578d70858e4c550f1011e7494d4911fc2612263c0b3452", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76028050ff572d1cab578d70858e4c550f1011e7494d4911fc2612263c0b3452", kill_on_drop: false }`
[INFO] [stdout] 76028050ff572d1cab578d70858e4c550f1011e7494d4911fc2612263c0b3452
[INFO] checking coredump-0.1.2 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate coredump 0.1.2 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate coredump 0.1.2 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 coredump 0.1.2
[INFO] finished tweaking crates.io crate coredump 0.1.2
[INFO] tweaked toml for crates.io crate coredump 0.1.2 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] 123e0f74fe54f85fdf941dd6cd7cd4859da77e684b7050e0330d116033795b7a
[INFO] running `Command { std: "docker" "start" "-a" "123e0f74fe54f85fdf941dd6cd7cd4859da77e684b7050e0330d116033795b7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "123e0f74fe54f85fdf941dd6cd7cd4859da77e684b7050e0330d116033795b7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "123e0f74fe54f85fdf941dd6cd7cd4859da77e684b7050e0330d116033795b7a", kill_on_drop: false }`
[INFO] [stdout] 123e0f74fe54f85fdf941dd6cd7cd4859da77e684b7050e0330d116033795b7a
[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] 2d89fe0224e723f750062855f551dde72da9283ded27cd2b02e7d89752966385
[INFO] running `Command { std: "docker" "start" "-a" "2d89fe0224e723f750062855f551dde72da9283ded27cd2b02e7d89752966385", kill_on_drop: false }`
[INFO] [stderr]     Checking coredump v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/lib.rs:108:5
[INFO] [stdout]     |
[INFO] [stdout] 108 |     Err(IoError::last_os_error())?;
[INFO] [stdout]     |     ^^^ cannot infer type of the type parameter `T` declared on the enum `Result`
[INFO] [stdout]     |
[INFO] [stdout] help: consider specifying the generic arguments
[INFO] [stdout]     |
[INFO] [stdout] 108 |     Err::<T, std::io::Error>(IoError::last_os_error())?;
[INFO] [stdout]     |        +++++++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/lib.rs:108:5
[INFO] [stdout]     |
[INFO] [stdout] 108 |     Err(IoError::last_os_error())?;
[INFO] [stdout]     |     ^^^ cannot infer type of the type parameter `T` declared on the enum `Result`
[INFO] [stdout]     |
[INFO] [stdout] help: consider specifying the generic arguments
[INFO] [stdout]     |
[INFO] [stdout] 108 |     Err::<T, std::io::Error>(IoError::last_os_error())?;
[INFO] [stdout]     |        +++++++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/lib.rs:177:5
[INFO] [stdout]     |
[INFO] [stdout] 177 |     Err(IoError::new(ErrorKind::Other, "hard limit is zero").into())
[INFO] [stdout]     |     ^^^ cannot infer type of the type parameter `T` declared on the enum `Result`
[INFO] [stdout]     |
[INFO] [stdout] help: consider specifying the generic arguments
[INFO] [stdout]     |
[INFO] [stdout] 177 |     Err::<T, Error>(IoError::new(ErrorKind::Other, "hard limit is zero").into())
[INFO] [stdout]     |        ++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/lib.rs:177:5
[INFO] [stdout]     |
[INFO] [stdout] 177 |     Err(IoError::new(ErrorKind::Other, "hard limit is zero").into())
[INFO] [stdout]     |     ^^^ cannot infer type of the type parameter `T` declared on the enum `Result`
[INFO] [stdout]     |
[INFO] [stdout] help: consider specifying the generic arguments
[INFO] [stdout]     |
[INFO] [stdout] 177 |     Err::<T, Error>(IoError::new(ErrorKind::Other, "hard limit is zero").into())
[INFO] [stdout]     |        ++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `coredump` (lib test) due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `coredump` (lib) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "2d89fe0224e723f750062855f551dde72da9283ded27cd2b02e7d89752966385", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d89fe0224e723f750062855f551dde72da9283ded27cd2b02e7d89752966385", kill_on_drop: false }`
[INFO] [stdout] 2d89fe0224e723f750062855f551dde72da9283ded27cd2b02e7d89752966385