[INFO] updating cached repository https://github.com/jeremystucki/mvr [INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/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] d861f1ef7deca54eb3e8ef1df2f2b7840d230f95 [INFO] checking jeremystucki/mvr against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeremystucki%2Fmvr" "/workspace/builds/worker-5/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/jeremystucki/mvr on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd [INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/jeremystucki/mvr [INFO] finished tweaking git repo https://github.com/jeremystucki/mvr [INFO] tweaked toml for git repo https://github.com/jeremystucki/mvr written to /workspace/builds/worker-5/source/Cargo.toml [INFO] crate git repo https://github.com/jeremystucki/mvr already has a lockfile, it will not be regenerated [INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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] a5330aba0345abfdf6641d805e149b6cdeca69cfe64aba150aa41dba9562ebd5 [INFO] running `"docker" "start" "-a" "a5330aba0345abfdf6641d805e149b6cdeca69cfe64aba150aa41dba9562ebd5"` [INFO] [stderr] Compiling syn v0.15.39 [INFO] [stderr] Compiling memchr v2.2.0 [INFO] [stderr] Checking nearly_eq v0.2.4 [INFO] [stderr] Checking nameof v1.1.0 [INFO] [stderr] Compiling mockiato-codegen v0.9.0 [INFO] [stderr] Compiling mockiato v0.9.0 [INFO] [stderr] Checking nom v5.0.0 [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-0.9.0/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-0.9.0/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-0.9.0/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] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] running `"docker" "inspect" "a5330aba0345abfdf6641d805e149b6cdeca69cfe64aba150aa41dba9562ebd5"` [INFO] running `"docker" "rm" "-f" "a5330aba0345abfdf6641d805e149b6cdeca69cfe64aba150aa41dba9562ebd5"` [INFO] [stdout] a5330aba0345abfdf6641d805e149b6cdeca69cfe64aba150aa41dba9562ebd5