[INFO] cloning repository https://github.com/dingo-actual/silver
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dingo-actual/silver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdingo-actual%2Fsilver"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdingo-actual%2Fsilver'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d2b14e5357b44d74d2a65d72ed0c3753b1f21959
[INFO] checking dingo-actual/silver against try#89c05fd3cc6404a13e1bd71450c6132a2755fa4b for pr-69741
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdingo-actual%2Fsilver" "/workspace/builds/worker-0/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dingo-actual/silver on toolchain 89c05fd3cc6404a13e1bd71450c6132a2755fa4b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+89c05fd3cc6404a13e1bd71450c6132a2755fa4b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/dingo-actual/silver
[INFO] finished tweaking git repo https://github.com/dingo-actual/silver
[INFO] tweaked toml for git repo https://github.com/dingo-actual/silver written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/dingo-actual/silver already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+89c05fd3cc6404a13e1bd71450c6132a2755fa4b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+89c05fd3cc6404a13e1bd71450c6132a2755fa4b" "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] 7729b49d6276d0ced7c39a54e03528375a455bfad42ce0c56c70fafb366c984c
[INFO] running `"docker" "start" "-a" "7729b49d6276d0ced7c39a54e03528375a455bfad42ce0c56c70fafb366c984c"`
[INFO] [stderr]     Checking silver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0277]: can't compare `&U` with `U`
[INFO] [stderr]   --> src/lib.rs:43:38
[INFO] [stderr]    |
[INFO] [stderr] 43 |         if self.unset[*ix] || (alpha != self.last_alpha[*ix]) {
[INFO] [stderr]    |                                      ^^ no implementation for `&U == U`
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::cmp::PartialEq<U>` is not implemented for `&U`
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]    --> src/lib.rs:121:12
[INFO] [stderr]     |
[INFO] [stderr] 121 |       } else {
[INFO] [stderr]     |  ____________^
[INFO] [stderr] 122 | |         let alpha1 = svm.alpha[*ix1];
[INFO] [stderr] 123 | |         let alpha2 = svm.alpha[*ix2];
[INFO] [stderr] 124 | |         let y1 = svm.y_train[*ix1];
[INFO] [stderr] ...   |
[INFO] [stderr] 139 | |
[INFO] [stderr] 140 | |     }
[INFO] [stderr]     | |_____^ expected `bool`, found `()`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: can't compare `&U` with `U`
[INFO] [stderr]   --> src/lib.rs:43:38
[INFO] [stderr]    |
[INFO] [stderr] 43 |         if self.unset[*ix] || (alpha != self.last_alpha[*ix]) {
[INFO] [stderr]    |                                      ^^ no implementation for `&U == U`
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::cmp::PartialEq<U>` is not implemented for `&U`
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0277, E0308.
[INFO] [stderr] For more information about an error, try `rustc --explain E0277`.
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]    --> src/lib.rs:121:12
[INFO] [stderr]     |
[INFO] [stderr] 121 |       } else {
[INFO] [stderr]     |  ____________^
[INFO] [stderr] 122 | |         let alpha1 = svm.alpha[*ix1];
[INFO] [stderr] 123 | |         let alpha2 = svm.alpha[*ix2];
[INFO] [stderr] 124 | |         let y1 = svm.y_train[*ix1];
[INFO] [stderr] ...   |
[INFO] [stderr] 139 | |
[INFO] [stderr] 140 | |     }
[INFO] [stderr]     | |_____^ expected `bool`, found `()`
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `silver`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0277, E0308.
[INFO] [stderr] For more information about an error, try `rustc --explain E0277`.
[INFO] [stderr] error: could not compile `silver`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "7729b49d6276d0ced7c39a54e03528375a455bfad42ce0c56c70fafb366c984c"`
[INFO] running `"docker" "rm" "-f" "7729b49d6276d0ced7c39a54e03528375a455bfad42ce0c56c70fafb366c984c"`
[INFO] [stdout] 7729b49d6276d0ced7c39a54e03528375a455bfad42ce0c56c70fafb366c984c