[INFO] fetching crate panic-serial 0.1.2...
[INFO] checking panic-serial-0.1.2 against try#47988eeabf6090a44f37845ce0a796693c491c97 for pr-115974
[INFO] extracting crate panic-serial 0.1.2 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate panic-serial 0.1.2 on toolchain 47988eeabf6090a44f37845ce0a796693c491c97
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+47988eeabf6090a44f37845ce0a796693c491c97" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate panic-serial 0.1.2
[INFO] finished tweaking crates.io crate panic-serial 0.1.2
[INFO] tweaked toml for crates.io crate panic-serial 0.1.2 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+47988eeabf6090a44f37845ce0a796693c491c97" "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" "+47988eeabf6090a44f37845ce0a796693c491c97" "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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+47988eeabf6090a44f37845ce0a796693c491c97" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3e77e876189b8e0232b79b6615b4d503eb4da9cadc62a4b27b50e1eb0c28a5b7
[INFO] running `Command { std: "docker" "start" "-a" "3e77e876189b8e0232b79b6615b4d503eb4da9cadc62a4b27b50e1eb0c28a5b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3e77e876189b8e0232b79b6615b4d503eb4da9cadc62a4b27b50e1eb0c28a5b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e77e876189b8e0232b79b6615b4d503eb4da9cadc62a4b27b50e1eb0c28a5b7", kill_on_drop: false }`
[INFO] [stdout] 3e77e876189b8e0232b79b6615b4d503eb4da9cadc62a4b27b50e1eb0c28a5b7
[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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+47988eeabf6090a44f37845ce0a796693c491c97" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d0d9d0c64d21d7a423e0718edff7f289f69b5758a1ee6d6ee90774241b1bc541
[INFO] running `Command { std: "docker" "start" "-a" "d0d9d0c64d21d7a423e0718edff7f289f69b5758a1ee6d6ee90774241b1bc541", kill_on_drop: false }`
[INFO] [stderr]     Checking ufmt-write v0.1.0
[INFO] [stderr]    Compiling ufmt-macros v0.3.0
[INFO] [stderr]     Checking ufmt v0.2.0
[INFO] [stderr]     Checking panic-serial v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/lib.rs:124:16
[INFO] [stdout]     |
[INFO] [stdout] 124 |         if let Some(message) = info.message() {
[INFO] [stdout]     |                ^^^^^^^^^^^^^   -------------- this expression has type `Arguments<'_>`
[INFO] [stdout]     |                |
[INFO] [stdout]     |                expected `Arguments<'_>`, found `Option<_>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected struct `Arguments<'_>`
[INFO] [stdout]                  found enum `Option<_>`
[INFO] [stdout] help: you might have meant to use field `fmt` whose type is `Option<&[core::fmt::rt::Placeholder]>`
[INFO] [stdout]     |
[INFO] [stdout] 124 |         if let Some(message) = info.message().fmt {
[INFO] [stdout]     |                                ~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/lib.rs:124:16
[INFO] [stdout]     |
[INFO] [stdout] 124 |         if let Some(message) = info.message() {
[INFO] [stdout]     |                ^^^^^^^^^^^^^   -------------- this expression has type `Arguments<'_>`
[INFO] [stdout]     |                |
[INFO] [stdout]     |                expected `Arguments<'_>`, found `Option<_>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected struct `Arguments<'_>`
[INFO] [stdout]                  found enum `Option<_>`
[INFO] [stdout] help: you might have meant to use field `fmt` whose type is `Option<&[core::fmt::rt::Placeholder]>`
[INFO] [stdout]     |
[INFO] [stdout] 124 |         if let Some(message) = info.message().fmt {
[INFO] [stdout]     |                                ~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `panic-serial` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `panic-serial` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "d0d9d0c64d21d7a423e0718edff7f289f69b5758a1ee6d6ee90774241b1bc541", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0d9d0c64d21d7a423e0718edff7f289f69b5758a1ee6d6ee90774241b1bc541", kill_on_drop: false }`
[INFO] [stdout] d0d9d0c64d21d7a423e0718edff7f289f69b5758a1ee6d6ee90774241b1bc541