[INFO] fetching crate worker-sys 0.0.10...
[INFO] checking worker-sys-0.0.10 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate worker-sys 0.0.10 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate worker-sys 0.0.10 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 worker-sys 0.0.10
[INFO] finished tweaking crates.io crate worker-sys 0.0.10
[INFO] tweaked toml for crates.io crate worker-sys 0.0.10 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 16 packages
[INFO] [stderr]       Adding js-sys v0.3.63 (latest: v0.3.69)
[INFO] [stderr]       Adding wasm-bindgen v0.2.86 (latest: v0.2.92)
[INFO] [stderr]       Adding wasm-bindgen-backend v0.2.86 (latest: v0.2.92)
[INFO] [stderr]       Adding wasm-bindgen-macro v0.2.86 (latest: v0.2.92)
[INFO] [stderr]       Adding wasm-bindgen-macro-support v0.2.86 (latest: v0.2.92)
[INFO] [stderr]       Adding wasm-bindgen-shared v0.2.86 (latest: v0.2.92)
[INFO] [stderr]       Adding web-sys v0.3.63 (latest: v0.3.69)
[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] 3e3b7d73ad7e215ebcf6fb337d6a38e3a4b45ab90828d1f840b8cc662213be94
[INFO] running `Command { std: "docker" "start" "-a" "3e3b7d73ad7e215ebcf6fb337d6a38e3a4b45ab90828d1f840b8cc662213be94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3e3b7d73ad7e215ebcf6fb337d6a38e3a4b45ab90828d1f840b8cc662213be94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e3b7d73ad7e215ebcf6fb337d6a38e3a4b45ab90828d1f840b8cc662213be94", kill_on_drop: false }`
[INFO] [stdout] 3e3b7d73ad7e215ebcf6fb337d6a38e3a4b45ab90828d1f840b8cc662213be94
[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] 9f00580154fff62052f0bdc75f8246307fd95fc777c93090cd38e80b7a457c12
[INFO] running `Command { std: "docker" "start" "-a" "9f00580154fff62052f0bdc75f8246307fd95fc777c93090cd38e80b7a457c12", kill_on_drop: false }`
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.86
[INFO] [stderr]    Compiling bumpalo v3.15.4
[INFO] [stderr]    Compiling wasm-bindgen v0.2.86
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.86
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.86
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.86
[INFO] [stderr]     Checking js-sys v0.3.63
[INFO] [stderr]     Checking web-sys v0.3.63
[INFO] [stderr]     Checking worker-sys v0.0.10 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.10s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: wasm-bindgen v0.2.86
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "9f00580154fff62052f0bdc75f8246307fd95fc777c93090cd38e80b7a457c12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f00580154fff62052f0bdc75f8246307fd95fc777c93090cd38e80b7a457c12", kill_on_drop: false }`
[INFO] [stdout] 9f00580154fff62052f0bdc75f8246307fd95fc777c93090cd38e80b7a457c12
[INFO] checking worker-sys-0.0.10 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate worker-sys 0.0.10 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate worker-sys 0.0.10 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 worker-sys 0.0.10
[INFO] finished tweaking crates.io crate worker-sys 0.0.10
[INFO] tweaked toml for crates.io crate worker-sys 0.0.10 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] 9d5358caa47a9f59a24cc2c1bc83eaebcc77cb5f449ff3d5e33e5e7df2e5704d
[INFO] running `Command { std: "docker" "start" "-a" "9d5358caa47a9f59a24cc2c1bc83eaebcc77cb5f449ff3d5e33e5e7df2e5704d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9d5358caa47a9f59a24cc2c1bc83eaebcc77cb5f449ff3d5e33e5e7df2e5704d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d5358caa47a9f59a24cc2c1bc83eaebcc77cb5f449ff3d5e33e5e7df2e5704d", kill_on_drop: false }`
[INFO] [stdout] 9d5358caa47a9f59a24cc2c1bc83eaebcc77cb5f449ff3d5e33e5e7df2e5704d
[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] 2777803c5989aa17ef6d9cf4ee364548053643f4a2d834dd01ae2042a1f4bb0c
[INFO] running `Command { std: "docker" "start" "-a" "2777803c5989aa17ef6d9cf4ee364548053643f4a2d834dd01ae2042a1f4bb0c", kill_on_drop: false }`
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.86
[INFO] [stderr]    Compiling bumpalo v3.15.4
[INFO] [stderr]    Compiling wasm-bindgen v0.2.86
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.86
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.86
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/wasm-bindgen-macro-support-0.2.86/src/parser.rs:306:17
[INFO] [stdout]     |
[INFO] [stdout] 306 | /                 if input.parse::<Token![=]>().is_ok() {
[INFO] [stdout] 307 | |                     let ident = input.parse::<AnyIdent>()?.0;
[INFO] [stdout] 308 | |                     return Ok(BindgenAttr::$variant(attr_span, Some(ident)))
[INFO] [stdout] 309 | |                 } else {
[INFO] [stdout] 310 | |                     return Ok(BindgenAttr::$variant(attr_span, None));
[INFO] [stdout] 311 | |                 }
[INFO] [stdout]     | |_________________^ cannot satisfy `_ -> _`
[INFO] [stdout] ...
[INFO] [stdout] 366 |           attrgen!(parsers);
[INFO] [stdout]     |           ----------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `parsers` which comes from the expansion of the macro `attrgen` (in Nightly builds, run with -Z macro-backtrace for more info)
[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 E0284`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `wasm-bindgen-macro-support` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "2777803c5989aa17ef6d9cf4ee364548053643f4a2d834dd01ae2042a1f4bb0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2777803c5989aa17ef6d9cf4ee364548053643f4a2d834dd01ae2042a1f4bb0c", kill_on_drop: false }`
[INFO] [stdout] 2777803c5989aa17ef6d9cf4ee364548053643f4a2d834dd01ae2042a1f4bb0c