[INFO] fetching crate webgl-rs 0.2.2...
[INFO] checking webgl-rs-0.2.2 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate webgl-rs 0.2.2 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate webgl-rs 0.2.2 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 webgl-rs 0.2.2
[INFO] finished tweaking crates.io crate webgl-rs 0.2.2
[INFO] tweaked toml for crates.io crate webgl-rs 0.2.2 written to /workspace/builds/worker-2-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 14 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-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] d1662bef4b1108124c3f8a31f658bd49d84f1519b71557d74261ad47db80455e
[INFO] running `Command { std: "docker" "start" "-a" "d1662bef4b1108124c3f8a31f658bd49d84f1519b71557d74261ad47db80455e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d1662bef4b1108124c3f8a31f658bd49d84f1519b71557d74261ad47db80455e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d1662bef4b1108124c3f8a31f658bd49d84f1519b71557d74261ad47db80455e", kill_on_drop: false }`
[INFO] [stdout] d1662bef4b1108124c3f8a31f658bd49d84f1519b71557d74261ad47db80455e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 5602a4eb2d06e8ce2023d5029dd9f414c782ea8178aa6985c32078b013c9d658
[INFO] running `Command { std: "docker" "start" "-a" "5602a4eb2d06e8ce2023d5029dd9f414c782ea8178aa6985c32078b013c9d658", kill_on_drop: false }`
[INFO] [stderr]     Checking webgl-rs v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `context` and `inner` are never read
[INFO] [stdout]  --> src/uniform_location.rs:7:16
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct WebGLRSUniformLocation<'ctx> {
[INFO] [stdout]   |            ---------------------- fields in this struct
[INFO] [stdout] 7 |     pub(crate) context: &'ctx WebGL2RenderingContext,
[INFO] [stdout]   |                ^^^^^^^
[INFO] [stdout] 8 |     pub(crate) inner: WebGLUniformLocation,
[INFO] [stdout]   |                ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `WebGLRSUniformLocation` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `document` should have an upper case name
[INFO] [stdout]   --> src/rendering_context.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     static document: HTMLDocument;
[INFO] [stdout]    |            ^^^^^^^^ help: convert the identifier to upper case: `DOCUMENT`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `context` and `inner` are never read
[INFO] [stdout]  --> src/uniform_location.rs:7:16
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct WebGLRSUniformLocation<'ctx> {
[INFO] [stdout]   |            ---------------------- fields in this struct
[INFO] [stdout] 7 |     pub(crate) context: &'ctx WebGL2RenderingContext,
[INFO] [stdout]   |                ^^^^^^^
[INFO] [stdout] 8 |     pub(crate) inner: WebGLUniformLocation,
[INFO] [stdout]   |                ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `WebGLRSUniformLocation` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `document` should have an upper case name
[INFO] [stdout]   --> src/rendering_context.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     static document: HTMLDocument;
[INFO] [stdout]    |            ^^^^^^^^ help: convert the identifier to upper case: `DOCUMENT`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.24s
[INFO] running `Command { std: "docker" "inspect" "5602a4eb2d06e8ce2023d5029dd9f414c782ea8178aa6985c32078b013c9d658", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5602a4eb2d06e8ce2023d5029dd9f414c782ea8178aa6985c32078b013c9d658", kill_on_drop: false }`
[INFO] [stdout] 5602a4eb2d06e8ce2023d5029dd9f414c782ea8178aa6985c32078b013c9d658
[INFO] checking webgl-rs-0.2.2 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate webgl-rs 0.2.2 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate webgl-rs 0.2.2 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 webgl-rs 0.2.2
[INFO] finished tweaking crates.io crate webgl-rs 0.2.2
[INFO] tweaked toml for crates.io crate webgl-rs 0.2.2 written to /workspace/builds/worker-2-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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 9e8415e26d255082aaad435df7393eb2a20e2fc9c66a92369f4f56b793bc9f12
[INFO] running `Command { std: "docker" "start" "-a" "9e8415e26d255082aaad435df7393eb2a20e2fc9c66a92369f4f56b793bc9f12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9e8415e26d255082aaad435df7393eb2a20e2fc9c66a92369f4f56b793bc9f12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e8415e26d255082aaad435df7393eb2a20e2fc9c66a92369f4f56b793bc9f12", kill_on_drop: false }`
[INFO] [stdout] 9e8415e26d255082aaad435df7393eb2a20e2fc9c66a92369f4f56b793bc9f12
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 35b6cad9ec91af3d2b76141df2bf97b9eb517e05daa9a83eb69a3ec8c53b2931
[INFO] running `Command { std: "docker" "start" "-a" "35b6cad9ec91af3d2b76141df2bf97b9eb517e05daa9a83eb69a3ec8c53b2931", kill_on_drop: false }`
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.92
[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-0.2.92/src/parser.rs:303:17
[INFO] [stdout]     |
[INFO] [stdout] 303 | /                 if input.parse::<Token![=]>().is_ok() {
[INFO] [stdout] 304 | |                     let ident = input.parse::<AnyIdent>()?.0;
[INFO] [stdout] 305 | |                     return Ok(BindgenAttr::$variant(attr_span, Some(ident)))
[INFO] [stdout] 306 | |                 } else {
[INFO] [stdout] 307 | |                     return Ok(BindgenAttr::$variant(attr_span, None));
[INFO] [stdout] 308 | |                 }
[INFO] [stdout]     | |_________________^ cannot satisfy `_ -> _`
[INFO] [stdout] ...
[INFO] [stdout] 363 |           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" "35b6cad9ec91af3d2b76141df2bf97b9eb517e05daa9a83eb69a3ec8c53b2931", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35b6cad9ec91af3d2b76141df2bf97b9eb517e05daa9a83eb69a3ec8c53b2931", kill_on_drop: false }`
[INFO] [stdout] 35b6cad9ec91af3d2b76141df2bf97b9eb517e05daa9a83eb69a3ec8c53b2931