[INFO] fetching crate wa-serde-derive 0.1.137...
[INFO] checking wa-serde-derive-0.1.137 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate wa-serde-derive 0.1.137 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate wa-serde-derive 0.1.137 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 wa-serde-derive 0.1.137
[INFO] finished tweaking crates.io crate wa-serde-derive 0.1.137
[INFO] tweaked toml for crates.io crate wa-serde-derive 0.1.137 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] [stderr]       Adding watt v0.4.6 (latest: v0.5.0)
[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 watt v0.4.6
[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] 095d3f07d43d2cc52f4645d7b5cc1210ded3f9808051b774d71f3dabbd6dccbd
[INFO] running `Command { std: "docker" "start" "-a" "095d3f07d43d2cc52f4645d7b5cc1210ded3f9808051b774d71f3dabbd6dccbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "095d3f07d43d2cc52f4645d7b5cc1210ded3f9808051b774d71f3dabbd6dccbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "095d3f07d43d2cc52f4645d7b5cc1210ded3f9808051b774d71f3dabbd6dccbd", kill_on_drop: false }`
[INFO] [stdout] 095d3f07d43d2cc52f4645d7b5cc1210ded3f9808051b774d71f3dabbd6dccbd
[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] fe843eaf8ba436449f22c475bb7ef899c2d18ec9fce8d78f891ab45599b96d1c
[INFO] running `Command { std: "docker" "start" "-a" "fe843eaf8ba436449f22c475bb7ef899c2d18ec9fce8d78f891ab45599b96d1c", kill_on_drop: false }`
[INFO] [stderr]     Checking watt v0.4.6
[INFO] [stderr]     Checking wa-serde-derive v0.1.137 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `Command { std: "docker" "inspect" "fe843eaf8ba436449f22c475bb7ef899c2d18ec9fce8d78f891ab45599b96d1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe843eaf8ba436449f22c475bb7ef899c2d18ec9fce8d78f891ab45599b96d1c", kill_on_drop: false }`
[INFO] [stdout] fe843eaf8ba436449f22c475bb7ef899c2d18ec9fce8d78f891ab45599b96d1c
[INFO] checking wa-serde-derive-0.1.137 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate wa-serde-derive 0.1.137 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate wa-serde-derive 0.1.137 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 wa-serde-derive 0.1.137
[INFO] finished tweaking crates.io crate wa-serde-derive 0.1.137
[INFO] tweaked toml for crates.io crate wa-serde-derive 0.1.137 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] 84c54cd212288d8617aa34762b26fd029d99783d35696e6b8c6ddaad00dee9d1
[INFO] running `Command { std: "docker" "start" "-a" "84c54cd212288d8617aa34762b26fd029d99783d35696e6b8c6ddaad00dee9d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "84c54cd212288d8617aa34762b26fd029d99783d35696e6b8c6ddaad00dee9d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "84c54cd212288d8617aa34762b26fd029d99783d35696e6b8c6ddaad00dee9d1", kill_on_drop: false }`
[INFO] [stdout] 84c54cd212288d8617aa34762b26fd029d99783d35696e6b8c6ddaad00dee9d1
[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] ee33e8aed1b2a2aa4452ce52ee99efa85aefb7fde6aa0f552a80dc9a3d0742c7
[INFO] running `Command { std: "docker" "start" "-a" "ee33e8aed1b2a2aa4452ce52ee99efa85aefb7fde6aa0f552a80dc9a3d0742c7", kill_on_drop: false }`
[INFO] [stderr]     Checking watt v0.4.6
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/watt-0.4.6/src/sym.rs:37:16
[INFO] [stdout]    |
[INFO] [stdout] 37 |     Data::with(|d| panic!("{}", d.string[string]));
[INFO] [stdout]    |                ^^^
[INFO] [stdout]    |
[INFO] [stdout] help: try giving this closure an explicit return type
[INFO] [stdout]    |
[INFO] [stdout] 37 |     Data::with(|d| -> /* Type */ panic!("{}", d.string[string]));
[INFO] [stdout]    |                    +++++++++++++
[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 `watt` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "ee33e8aed1b2a2aa4452ce52ee99efa85aefb7fde6aa0f552a80dc9a3d0742c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee33e8aed1b2a2aa4452ce52ee99efa85aefb7fde6aa0f552a80dc9a3d0742c7", kill_on_drop: false }`
[INFO] [stdout] ee33e8aed1b2a2aa4452ce52ee99efa85aefb7fde6aa0f552a80dc9a3d0742c7