[INFO] fetching crate mockiato 0.9.1... [INFO] checking mockiato-0.9.1 against master#446e5e57b667c841ba3ebb4b41b44fb98bd3af4b for pr-65294 [INFO] extracting crate mockiato 0.9.1 into /workspace/builds/worker-1/source [INFO] validating manifest of crates.io crate mockiato 0.9.1 on toolchain 446e5e57b667c841ba3ebb4b41b44fb98bd3af4b [INFO] running `"/workspace/cargo-home/bin/cargo" "+446e5e57b667c841ba3ebb4b41b44fb98bd3af4b" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking crates.io crate mockiato 0.9.1 [INFO] removed 1 missing examples [INFO] finished tweaking crates.io crate mockiato 0.9.1 [INFO] tweaked toml for crates.io crate mockiato 0.9.1 written to /workspace/builds/worker-1/source/Cargo.toml [INFO] running `"/workspace/cargo-home/bin/cargo" "+446e5e57b667c841ba3ebb4b41b44fb98bd3af4b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` [INFO] running `"/workspace/cargo-home/bin/cargo" "+446e5e57b667c841ba3ebb4b41b44fb98bd3af4b" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-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" "+446e5e57b667c841ba3ebb4b41b44fb98bd3af4b" "check" "--frozen" "--all" "--all-targets"` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 6042d836b3f8dc9000334918ed5033b9b7bf7b554890e64e7384e08bb59fe322 [INFO] running `"docker" "start" "-a" "6042d836b3f8dc9000334918ed5033b9b7bf7b554890e64e7384e08bb59fe322"` [INFO] [stderr] Compiling proc-macro2 v1.0.6 [INFO] [stderr] Compiling syn v1.0.5 [INFO] [stderr] Checking nameof v1.1.0 [INFO] [stderr] Checking nearly_eq v0.2.4 [INFO] [stderr] Compiling mockiato-codegen v0.9.5 [INFO] [stderr] Compiling mockiato v0.9.1 (/opt/rustwide/workdir) [INFO] [stderr] Compiling quote v1.0.2 [INFO] [stderr] error[E0520]: `default_return_value` specializes an item from a parent `impl`, but that item is not marked `default` [INFO] [stderr] --> 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] --> 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] --> 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[E0520]: `default_return_value` specializes an item from a parent `impl`, but that item is not marked `default` [INFO] [stderr] --> 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] --> 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] --> 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: 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] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] running `"docker" "inspect" "6042d836b3f8dc9000334918ed5033b9b7bf7b554890e64e7384e08bb59fe322"` [INFO] running `"docker" "rm" "-f" "6042d836b3f8dc9000334918ed5033b9b7bf7b554890e64e7384e08bb59fe322"` [INFO] [stdout] 6042d836b3f8dc9000334918ed5033b9b7bf7b554890e64e7384e08bb59fe322