[INFO] fetching crate matchertools 0.1.1...
[INFO] checking matchertools-0.1.1 against master#4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5 for pr-81174
[INFO] extracting crate matchertools 0.1.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate matchertools 0.1.1 on toolchain 4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate matchertools 0.1.1
[INFO] finished tweaking crates.io crate matchertools 0.1.1
[INFO] tweaked toml for crates.io crate matchertools 0.1.1 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4018d117b003ebb54164f7913f93c01d25f98a7f576c9f1d508372808f83d038
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4018d117b003ebb54164f7913f93c01d25f98a7f576c9f1d508372808f83d038", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4018d117b003ebb54164f7913f93c01d25f98a7f576c9f1d508372808f83d038", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4018d117b003ebb54164f7913f93c01d25f98a7f576c9f1d508372808f83d038", kill_on_drop: false }`
[INFO] [stdout] 4018d117b003ebb54164f7913f93c01d25f98a7f576c9f1d508372808f83d038
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 92c4833ccb4ab3d793915ba48938f70a4192c907fa06959f47e4e9040b2d9af0
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "92c4833ccb4ab3d793915ba48938f70a4192c907fa06959f47e4e9040b2d9af0", kill_on_drop: false }`
[INFO] [stderr]     Checking matchertools v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/lib.rs:113:5
[INFO] [stdout]     |
[INFO] [stdout] 113 |     /// You better go read the algorithm on wikipedia: https://en.wikipedia.org/wiki/Stable_marriage_problem
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 116 |     let mut men_preferences = men_preferences.clone();
[INFO] [stdout]     |     -------------------------------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/lib.rs:192:5
[INFO] [stdout]     |
[INFO] [stdout] 192 | /     /// Tentatively accepts proposals. The rejections are permanent. The `engaged_man_woman` HashMap represents an unstable engagement. It sudde...
[INFO] [stdout] 193 | |     /// becomes 'stable' (go read about gale-shapley to understand what stable means) in the final round, when everyone is engaged to someone
[INFO] [stdout]     | |_____________________________________________________________________________________________________________________________________________^
[INFO] [stdout] 194 | /     for (woman, interested_men) in proposals {
[INFO] [stdout] 195 | |         let best_interested_man =
[INFO] [stdout] 196 | |             get_best_man_from_men_interested_in_a_woman(woman, women_preferences, &interested_men);
[INFO] [stdout] 197 | |         let man_currently_engaged_to = get_currently_engaged_man(&engaged_man_woman, &woman);
[INFO] [stdout] ...   |
[INFO] [stdout] 218 | |         }
[INFO] [stdout] 219 | |     }
[INFO] [stdout]     | |_____- rustdoc does not generate documentation for expressions
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/lib.rs:264:5
[INFO] [stdout]     |
[INFO] [stdout] 264 |       /// Returns the man a woman is currently engaged to
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 265 | /     for (man, engaged_woman) in engaged_man_woman {
[INFO] [stdout] 266 | |         if *engaged_woman == *woman {
[INFO] [stdout] 267 | |             return Some(*man);
[INFO] [stdout] 268 | |         }
[INFO] [stdout] 269 | |     }
[INFO] [stdout]     | |_____- rustdoc does not generate documentation for expressions
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/lib.rs:113:5
[INFO] [stdout]     |
[INFO] [stdout] 113 |     /// You better go read the algorithm on wikipedia: https://en.wikipedia.org/wiki/Stable_marriage_problem
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 116 |     let mut men_preferences = men_preferences.clone();
[INFO] [stdout]     |     -------------------------------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/lib.rs:192:5
[INFO] [stdout]     |
[INFO] [stdout] 192 | /     /// Tentatively accepts proposals. The rejections are permanent. The `engaged_man_woman` HashMap represents an unstable engagement. It sudde...
[INFO] [stdout] 193 | |     /// becomes 'stable' (go read about gale-shapley to understand what stable means) in the final round, when everyone is engaged to someone
[INFO] [stdout]     | |_____________________________________________________________________________________________________________________________________________^
[INFO] [stdout] 194 | /     for (woman, interested_men) in proposals {
[INFO] [stdout] 195 | |         let best_interested_man =
[INFO] [stdout] 196 | |             get_best_man_from_men_interested_in_a_woman(woman, women_preferences, &interested_men);
[INFO] [stdout] 197 | |         let man_currently_engaged_to = get_currently_engaged_man(&engaged_man_woman, &woman);
[INFO] [stdout] ...   |
[INFO] [stdout] 218 | |         }
[INFO] [stdout] 219 | |     }
[INFO] [stdout]     | |_____- rustdoc does not generate documentation for expressions
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/lib.rs:264:5
[INFO] [stdout]     |
[INFO] [stdout] 264 |       /// Returns the man a woman is currently engaged to
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 265 | /     for (man, engaged_woman) in engaged_man_woman {
[INFO] [stdout] 266 | |         if *engaged_woman == *woman {
[INFO] [stdout] 267 | |             return Some(*man);
[INFO] [stdout] 268 | |         }
[INFO] [stdout] 269 | |     }
[INFO] [stdout]     | |_____- rustdoc does not generate documentation for expressions
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.70s
[INFO] running `Command { std: "docker" "inspect" "92c4833ccb4ab3d793915ba48938f70a4192c907fa06959f47e4e9040b2d9af0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92c4833ccb4ab3d793915ba48938f70a4192c907fa06959f47e4e9040b2d9af0", kill_on_drop: false }`
[INFO] [stdout] 92c4833ccb4ab3d793915ba48938f70a4192c907fa06959f47e4e9040b2d9af0