[INFO] fetching crate l_group_validity 0.1.0...
[INFO] checking l_group_validity-0.1.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate l_group_validity 0.1.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate l_group_validity 0.1.0 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 l_group_validity 0.1.0
[INFO] finished tweaking crates.io crate l_group_validity 0.1.0
[INFO] tweaked toml for crates.io crate l_group_validity 0.1.0 written to /workspace/builds/worker-7-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 4 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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded truncated_free_groups v0.1.0
[INFO] [stderr]   Downloaded l_group_cnf v0.1.0
[INFO] [stderr]   Downloaded l_group_formulas v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] def1c26d04c78ce70ab8c732aa91995bdfc82886ddab2e896197d4e089ec4921
[INFO] running `Command { std: "docker" "start" "-a" "def1c26d04c78ce70ab8c732aa91995bdfc82886ddab2e896197d4e089ec4921", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "def1c26d04c78ce70ab8c732aa91995bdfc82886ddab2e896197d4e089ec4921", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "def1c26d04c78ce70ab8c732aa91995bdfc82886ddab2e896197d4e089ec4921", kill_on_drop: false }`
[INFO] [stdout] def1c26d04c78ce70ab8c732aa91995bdfc82886ddab2e896197d4e089ec4921
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 63ccbf4bc749613e33aee254e5d835b959623dacca841483a4cbc6f9a68eb942
[INFO] running `Command { std: "docker" "start" "-a" "63ccbf4bc749613e33aee254e5d835b959623dacca841483a4cbc6f9a68eb942", kill_on_drop: false }`
[INFO] [stderr]     Checking l_group_formulas v0.1.0
[INFO] [stderr]     Checking truncated_free_groups v0.1.0
[INFO] [stderr]     Checking l_group_cnf v0.1.0
[INFO] [stderr]     Checking l_group_validity v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `Command { std: "docker" "inspect" "63ccbf4bc749613e33aee254e5d835b959623dacca841483a4cbc6f9a68eb942", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63ccbf4bc749613e33aee254e5d835b959623dacca841483a4cbc6f9a68eb942", kill_on_drop: false }`
[INFO] [stdout] 63ccbf4bc749613e33aee254e5d835b959623dacca841483a4cbc6f9a68eb942
[INFO] checking l_group_validity-0.1.0 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate l_group_validity 0.1.0 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate l_group_validity 0.1.0 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 l_group_validity 0.1.0
[INFO] finished tweaking crates.io crate l_group_validity 0.1.0
[INFO] tweaked toml for crates.io crate l_group_validity 0.1.0 written to /workspace/builds/worker-7-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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 7f20f349c6c99b5712ed2401bc2599717e4a6041771aaec80583a17de2d0c018
[INFO] running `Command { std: "docker" "start" "-a" "7f20f349c6c99b5712ed2401bc2599717e4a6041771aaec80583a17de2d0c018", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7f20f349c6c99b5712ed2401bc2599717e4a6041771aaec80583a17de2d0c018", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f20f349c6c99b5712ed2401bc2599717e4a6041771aaec80583a17de2d0c018", kill_on_drop: false }`
[INFO] [stdout] 7f20f349c6c99b5712ed2401bc2599717e4a6041771aaec80583a17de2d0c018
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] f3f50062b3dd4ab8271a718a8da85211a4fd4c299990a18abb472a964141f53e
[INFO] running `Command { std: "docker" "start" "-a" "f3f50062b3dd4ab8271a718a8da85211a4fd4c299990a18abb472a964141f53e", kill_on_drop: false }`
[INFO] [stderr]     Checking l_group_formulas v0.1.0
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/l_group_formulas-0.1.0/src/l_group_term/parse_l_group_term.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 | /         match parsed_free_group_term {
[INFO] [stdout] 31 | |             Err(_) => return Err(ParsingError::ParsingAtomError(string)),
[INFO] [stdout] 32 | |             Ok(term) => return Ok(LGroupTerm::Atom(term))
[INFO] [stdout] 33 | |         };
[INFO] [stdout]    | |_________^ cannot infer type
[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 `l_group_formulas` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "f3f50062b3dd4ab8271a718a8da85211a4fd4c299990a18abb472a964141f53e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3f50062b3dd4ab8271a718a8da85211a4fd4c299990a18abb472a964141f53e", kill_on_drop: false }`
[INFO] [stdout] f3f50062b3dd4ab8271a718a8da85211a4fd4c299990a18abb472a964141f53e