[INFO] fetching crate pp-rs 0.2.1...
[INFO] checking pp-rs-0.2.1 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate pp-rs 0.2.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate pp-rs 0.2.1 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 pp-rs 0.2.1
[INFO] finished tweaking crates.io crate pp-rs 0.2.1
[INFO] tweaked toml for crates.io crate pp-rs 0.2.1 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] 42aa1978c61b72b2237c62b44e3548a7e8ab9aee4cf2c0edb8af5d2143137c44
[INFO] running `Command { std: "docker" "start" "-a" "42aa1978c61b72b2237c62b44e3548a7e8ab9aee4cf2c0edb8af5d2143137c44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "42aa1978c61b72b2237c62b44e3548a7e8ab9aee4cf2c0edb8af5d2143137c44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42aa1978c61b72b2237c62b44e3548a7e8ab9aee4cf2c0edb8af5d2143137c44", kill_on_drop: false }`
[INFO] [stdout] 42aa1978c61b72b2237c62b44e3548a7e8ab9aee4cf2c0edb8af5d2143137c44
[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] 9d64a33de9c973a2b11ce741a28c35738d8efb07cbb56dba324ddca9f1b3a1fb
[INFO] running `Command { std: "docker" "start" "-a" "9d64a33de9c973a2b11ce741a28c35738d8efb07cbb56dba324ddca9f1b3a1fb", kill_on_drop: false }`
[INFO] [stderr]     Checking pp-rs v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `Command { std: "docker" "inspect" "9d64a33de9c973a2b11ce741a28c35738d8efb07cbb56dba324ddca9f1b3a1fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d64a33de9c973a2b11ce741a28c35738d8efb07cbb56dba324ddca9f1b3a1fb", kill_on_drop: false }`
[INFO] [stdout] 9d64a33de9c973a2b11ce741a28c35738d8efb07cbb56dba324ddca9f1b3a1fb
[INFO] checking pp-rs-0.2.1 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate pp-rs 0.2.1 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate pp-rs 0.2.1 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 pp-rs 0.2.1
[INFO] finished tweaking crates.io crate pp-rs 0.2.1
[INFO] tweaked toml for crates.io crate pp-rs 0.2.1 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] 6acc641506b09525e0ceaa21422f97e4f8a881afee239fa4e9c16f8fae25f93a
[INFO] running `Command { std: "docker" "start" "-a" "6acc641506b09525e0ceaa21422f97e4f8a881afee239fa4e9c16f8fae25f93a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6acc641506b09525e0ceaa21422f97e4f8a881afee239fa4e9c16f8fae25f93a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6acc641506b09525e0ceaa21422f97e4f8a881afee239fa4e9c16f8fae25f93a", kill_on_drop: false }`
[INFO] [stdout] 6acc641506b09525e0ceaa21422f97e4f8a881afee239fa4e9c16f8fae25f93a
[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] eaef17984cee4ddc30b6144b522cd869356c2897db24e9edf68ceece8561dac8
[INFO] running `Command { std: "docker" "start" "-a" "eaef17984cee4ddc30b6144b522cd869356c2897db24e9edf68ceece8561dac8", kill_on_drop: false }`
[INFO] [stderr]     Checking pp-rs v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]     --> src/pp.rs:1026:13
[INFO] [stdout]      |
[INFO] [stdout] 1026 | /             match self.step() {
[INFO] [stdout] 1027 | |                 Ok(token) => return Some(Ok(token)),
[INFO] [stdout] 1028 | |                 Err(StepExit::Error(err)) => return Some(Err(err)),
[INFO] [stdout] 1029 | |                 Err(StepExit::Finished) => return None,
[INFO] [stdout] 1030 | |                 Err(StepExit::Continue) => continue,
[INFO] [stdout] 1031 | |             };
[INFO] [stdout]      | |_____________^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]     --> src/pp.rs:1026:13
[INFO] [stdout]      |
[INFO] [stdout] 1026 | /             match self.step() {
[INFO] [stdout] 1027 | |                 Ok(token) => return Some(Ok(token)),
[INFO] [stdout] 1028 | |                 Err(StepExit::Error(err)) => return Some(Err(err)),
[INFO] [stdout] 1029 | |                 Err(StepExit::Finished) => return None,
[INFO] [stdout] 1030 | |                 Err(StepExit::Continue) => continue,
[INFO] [stdout] 1031 | |             };
[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 `pp-rs` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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 `pp-rs` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "eaef17984cee4ddc30b6144b522cd869356c2897db24e9edf68ceece8561dac8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eaef17984cee4ddc30b6144b522cd869356c2897db24e9edf68ceece8561dac8", kill_on_drop: false }`
[INFO] [stdout] eaef17984cee4ddc30b6144b522cd869356c2897db24e9edf68ceece8561dac8