[INFO] updating cached repository https://github.com/myelin-ai/engine [INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"` [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 0457e868357cef6916418e9674807b6988414444 [INFO] checking myelin-ai/engine against try#8d67a66581ea5498d7ac03b8f88a478d8ec75cf0 for pr-64564 [INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmyelin-ai%2Fengine" "work/builds/worker-2/source"` [INFO] [stderr] Cloning into 'work/builds/worker-2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/myelin-ai/engine on toolchain 8d67a66581ea5498d7ac03b8f88a478d8ec75cf0-alt [INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+8d67a66581ea5498d7ac03b8f88a478d8ec75cf0-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/myelin-ai/engine [INFO] finished tweaking git repo https://github.com/myelin-ai/engine [INFO] tweaked toml for git repo https://github.com/myelin-ai/engine written to work/builds/worker-2/source/Cargo.toml [INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+8d67a66581ea5498d7ac03b8f88a478d8ec75cf0-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` [INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+8d67a66581ea5498d7ac03b8f88a478d8ec75cf0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded mockiato-codegen v0.9.4 [INFO] [stderr] Downloaded mockiato v0.9.4 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+8d67a66581ea5498d7ac03b8f88a478d8ec75cf0-alt" "check" "--frozen" "--all" "--all-targets"` [INFO] [stdout] da858d0920c639c25f09796bdb41f0e83f44b757c7f70e1cc090798d0a87d5da [INFO] running `"docker" "start" "-a" "da858d0920c639c25f09796bdb41f0e83f44b757c7f70e1cc090798d0a87d5da"` [INFO] [stderr] Compiling proc-macro2 v1.0.4 [INFO] [stderr] Compiling syn v1.0.5 [INFO] [stderr] Checking nameof v1.1.0 [INFO] [stderr] Checking nearly_eq v0.2.4 [INFO] [stderr] Checking itertools v0.8.0 [INFO] [stderr] Checking generational-arena v0.2.3 [INFO] [stderr] Compiling mockiato-codegen v0.9.4 [INFO] [stderr] Compiling mockiato v0.9.4 [INFO] [stderr] Checking num-rational v0.2.2 [INFO] [stderr] Checking nalgebra v0.18.1 [INFO] [stderr] Compiling quote v1.0.2 [INFO] [stderr] Compiling serde_derive v1.0.101 [INFO] [stderr] error[E0520]: `default_return_value` specializes an item from a parent `impl`, but that item is not marked `default` [INFO] [stderr] --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mockiato-0.9.4/src/default_return_value.rs:21:5 [INFO] [stderr] | [INFO] [stderr] 14 | impl DefaultReturnValue for T where A: for<'args> ArgumentsMatcher<'args> {} [INFO] [stderr] | ------------------------------------------------------------------------------------- parent `impl` is here [INFO] [stderr] ... [INFO] [stderr] 21 | / fn default_return_value() -> Option>> { [INFO] [stderr] 22 | | Some(Rc::new(Cloned(()))) [INFO] [stderr] 23 | | } [INFO] [stderr] | |_____^ cannot specialize default item `default_return_value` [INFO] [stderr] | [INFO] [stderr] = note: to specialize, `default_return_value` in the parent `impl` must be marked `default` [INFO] [stderr] [INFO] [stderr] error[E0520]: `fmt` specializes an item from a parent `impl`, but that item is not marked `default` [INFO] [stderr] --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mockiato-0.9.4/src/fmt/debug.rs:27:5 [INFO] [stderr] | [INFO] [stderr] 20 | impl MaybeDebug for T where T: ?Sized {} [INFO] [stderr] | ------------------------------------------- parent `impl` is here [INFO] [stderr] ... [INFO] [stderr] 27 | / fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { [INFO] [stderr] 28 | | write!(f, "{:?}", self) [INFO] [stderr] 29 | | } [INFO] [stderr] | |_____^ cannot specialize default item `fmt` [INFO] [stderr] | [INFO] [stderr] = note: to specialize, `fmt` in the parent `impl` must be marked `default` [INFO] [stderr] [INFO] [stderr] error[E0520]: `default_return_value` specializes an item from a parent `impl`, but that item is not marked `default` [INFO] [stderr] --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mockiato-0.9.4/src/return_value.rs:26:5 [INFO] [stderr] | [INFO] [stderr] 19 | impl DefaultReturnValue for T where A: for<'args> ArgumentsMatcher<'args> {} [INFO] [stderr] | ------------------------------------------------------------------------------------- parent `impl` is here [INFO] [stderr] ... [INFO] [stderr] 26 | / fn default_return_value() -> Option>> { [INFO] [stderr] 27 | | Some(Rc::new(Cloned(()))) [INFO] [stderr] 28 | | } [INFO] [stderr] | |_____^ cannot specialize default item `default_return_value` [INFO] [stderr] | [INFO] [stderr] = note: to specialize, `default_return_value` in the parent `impl` must be marked `default` [INFO] [stderr] [INFO] [stderr] error: aborting due to 3 previous errors [INFO] [stderr] [INFO] [stderr] For more information about this error, try `rustc --explain E0520`. [INFO] [stderr] error: could not compile `mockiato`. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: build failed [INFO] running `"docker" "inspect" "da858d0920c639c25f09796bdb41f0e83f44b757c7f70e1cc090798d0a87d5da"` [INFO] running `"docker" "rm" "-f" "da858d0920c639c25f09796bdb41f0e83f44b757c7f70e1cc090798d0a87d5da"` [INFO] [stdout] da858d0920c639c25f09796bdb41f0e83f44b757c7f70e1cc090798d0a87d5da