[INFO] fetching crate guard 0.5.2...
[INFO] checking guard-0.5.2 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate guard 0.5.2 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate guard 0.5.2 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 guard 0.5.2
[INFO] finished tweaking crates.io crate guard 0.5.2
[INFO] tweaked toml for crates.io crate guard 0.5.2 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate guard 0.5.2 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 0c669b944ad0221346f3db970ba35d47ca741ea41b40b79a42fd6ba15e7f461a
[INFO] running `Command { std: "docker" "start" "-a" "0c669b944ad0221346f3db970ba35d47ca741ea41b40b79a42fd6ba15e7f461a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0c669b944ad0221346f3db970ba35d47ca741ea41b40b79a42fd6ba15e7f461a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c669b944ad0221346f3db970ba35d47ca741ea41b40b79a42fd6ba15e7f461a", kill_on_drop: false }`
[INFO] [stdout] 0c669b944ad0221346f3db970ba35d47ca741ea41b40b79a42fd6ba15e7f461a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 434f630376bb460a74aa26402dbc16fe7f9defd81b7d40c1c533b868ba24ebba
[INFO] running `Command { std: "docker" "start" "-a" "434f630376bb460a74aa26402dbc16fe7f9defd81b7d40c1c533b868ba24ebba", kill_on_drop: false }`
[INFO] [stderr]     Checking guard v0.5.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] running `Command { std: "docker" "inspect" "434f630376bb460a74aa26402dbc16fe7f9defd81b7d40c1c533b868ba24ebba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "434f630376bb460a74aa26402dbc16fe7f9defd81b7d40c1c533b868ba24ebba", kill_on_drop: false }`
[INFO] [stdout] 434f630376bb460a74aa26402dbc16fe7f9defd81b7d40c1c533b868ba24ebba
[INFO] checking guard-0.5.2 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate guard 0.5.2 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate guard 0.5.2 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 guard 0.5.2
[INFO] finished tweaking crates.io crate guard 0.5.2
[INFO] tweaked toml for crates.io crate guard 0.5.2 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate crates.io crate guard 0.5.2 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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 06548df2941524e7cc1a55cdddc9b82766c183b2881f19a7f47d47dfd074841b
[INFO] running `Command { std: "docker" "start" "-a" "06548df2941524e7cc1a55cdddc9b82766c183b2881f19a7f47d47dfd074841b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "06548df2941524e7cc1a55cdddc9b82766c183b2881f19a7f47d47dfd074841b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06548df2941524e7cc1a55cdddc9b82766c183b2881f19a7f47d47dfd074841b", kill_on_drop: false }`
[INFO] [stdout] 06548df2941524e7cc1a55cdddc9b82766c183b2881f19a7f47d47dfd074841b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 3fabfda020a71ad5cce75d0ede29f8e12d99c6a105fc70a4141c9b51fffc154a
[INFO] running `Command { std: "docker" "start" "-a" "3fabfda020a71ad5cce75d0ede29f8e12d99c6a105fc70a4141c9b51fffc154a", kill_on_drop: false }`
[INFO] [stderr]     Checking guard v0.5.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/lib.rs:498:13
[INFO] [stdout]     |
[INFO] [stdout] 498 |             panic!();
[INFO] [stdout]     |             ^^^^^^^^ cannot infer type
[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: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `guard` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "3fabfda020a71ad5cce75d0ede29f8e12d99c6a105fc70a4141c9b51fffc154a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3fabfda020a71ad5cce75d0ede29f8e12d99c6a105fc70a4141c9b51fffc154a", kill_on_drop: false }`
[INFO] [stdout] 3fabfda020a71ad5cce75d0ede29f8e12d99c6a105fc70a4141c9b51fffc154a