[INFO] fetching crate chainchomp 0.1.6...
[INFO] checking chainchomp-0.1.6 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate chainchomp 0.1.6 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate chainchomp 0.1.6 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 chainchomp 0.1.6
[INFO] finished tweaking crates.io crate chainchomp 0.1.6
[INFO] tweaked toml for crates.io crate chainchomp 0.1.6 written to /workspace/builds/worker-1-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] 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-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 8591fd534aba4a43d90ea47f367f9064f410340456ff3d3e5bd28f68a7a5c085
[INFO] running `Command { std: "docker" "start" "-a" "8591fd534aba4a43d90ea47f367f9064f410340456ff3d3e5bd28f68a7a5c085", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8591fd534aba4a43d90ea47f367f9064f410340456ff3d3e5bd28f68a7a5c085", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8591fd534aba4a43d90ea47f367f9064f410340456ff3d3e5bd28f68a7a5c085", kill_on_drop: false }`
[INFO] [stdout] 8591fd534aba4a43d90ea47f367f9064f410340456ff3d3e5bd28f68a7a5c085
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] af29d6216cc566f3b0d9481b25a9e46db2ee8e6d01b591e1cc25d8a2371cf0de
[INFO] running `Command { std: "docker" "start" "-a" "af29d6216cc566f3b0d9481b25a9e46db2ee8e6d01b591e1cc25d8a2371cf0de", kill_on_drop: false }`
[INFO] [stderr]     Checking chainchomp v0.1.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] running `Command { std: "docker" "inspect" "af29d6216cc566f3b0d9481b25a9e46db2ee8e6d01b591e1cc25d8a2371cf0de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af29d6216cc566f3b0d9481b25a9e46db2ee8e6d01b591e1cc25d8a2371cf0de", kill_on_drop: false }`
[INFO] [stdout] af29d6216cc566f3b0d9481b25a9e46db2ee8e6d01b591e1cc25d8a2371cf0de
[INFO] checking chainchomp-0.1.6 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate chainchomp 0.1.6 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate chainchomp 0.1.6 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 chainchomp 0.1.6
[INFO] finished tweaking crates.io crate chainchomp 0.1.6
[INFO] tweaked toml for crates.io crate chainchomp 0.1.6 written to /workspace/builds/worker-1-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] 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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] aab310bd0a22da0e40f925e2690dd0d30d440e2d5341ba35c1cbd10a66cc8bc8
[INFO] running `Command { std: "docker" "start" "-a" "aab310bd0a22da0e40f925e2690dd0d30d440e2d5341ba35c1cbd10a66cc8bc8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aab310bd0a22da0e40f925e2690dd0d30d440e2d5341ba35c1cbd10a66cc8bc8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aab310bd0a22da0e40f925e2690dd0d30d440e2d5341ba35c1cbd10a66cc8bc8", kill_on_drop: false }`
[INFO] [stdout] aab310bd0a22da0e40f925e2690dd0d30d440e2d5341ba35c1cbd10a66cc8bc8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] b5fdab2da5e0c7aa87902d6c09ea32e89c50aa8af6e9edd966d8ee5f6c36ff62
[INFO] running `Command { std: "docker" "start" "-a" "b5fdab2da5e0c7aa87902d6c09ea32e89c50aa8af6e9edd966d8ee5f6c36ff62", kill_on_drop: false }`
[INFO] [stderr]     Checking chainchomp v0.1.6 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> src/ctx_free.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 | /         match parser.parse(tokens, pos) {
[INFO] [stdout] 26 | |             Ok((ast, pos)) => return Ok((ast, pos)),
[INFO] [stdout] 27 | |             Err(_) => continue,
[INFO] [stdout] 28 | |         };
[INFO] [stdout]    | |_________^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> src/ctx_free.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 | /         match parser.parse(tokens, pos) {
[INFO] [stdout] 26 | |             Ok((ast, pos)) => return Ok((ast, pos)),
[INFO] [stdout] 27 | |             Err(_) => continue,
[INFO] [stdout] 28 | |         };
[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] [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 `chainchomp` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `chainchomp` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "b5fdab2da5e0c7aa87902d6c09ea32e89c50aa8af6e9edd966d8ee5f6c36ff62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5fdab2da5e0c7aa87902d6c09ea32e89c50aa8af6e9edd966d8ee5f6c36ff62", kill_on_drop: false }`
[INFO] [stdout] b5fdab2da5e0c7aa87902d6c09ea32e89c50aa8af6e9edd966d8ee5f6c36ff62