[INFO] cloning repository https://github.com/stefanobieler/combination_lock
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/stefanobieler/combination_lock" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstefanobieler%2Fcombination_lock", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstefanobieler%2Fcombination_lock'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2c900aed4891d872a8c69da01b336dc093a21282
[INFO] testing stefanobieler/combination_lock against master#432e145bd5a974c5b6f4dd9b352891bd7502b69d for pr-87041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstefanobieler%2Fcombination_lock" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/stefanobieler/combination_lock on toolchain 432e145bd5a974c5b6f4dd9b352891bd7502b69d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/stefanobieler/combination_lock
[INFO] finished tweaking git repo https://github.com/stefanobieler/combination_lock
[INFO] tweaked toml for git repo https://github.com/stefanobieler/combination_lock written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/stefanobieler/combination_lock already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1c37855e6f2fe7365f148641ebd07a9a4647c87f218b09f6a88a77edbe67d8e6
[INFO] running `Command { std: "docker" "start" "-a" "1c37855e6f2fe7365f148641ebd07a9a4647c87f218b09f6a88a77edbe67d8e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1c37855e6f2fe7365f148641ebd07a9a4647c87f218b09f6a88a77edbe67d8e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c37855e6f2fe7365f148641ebd07a9a4647c87f218b09f6a88a77edbe67d8e6", kill_on_drop: false }`
[INFO] [stdout] 1c37855e6f2fe7365f148641ebd07a9a4647c87f218b09f6a88a77edbe67d8e6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9706fce4d4d1ff1b9fe990d26c249bf0ab0055ce54e1a684247e98a354f943e3
[INFO] running `Command { std: "docker" "start" "-a" "9706fce4d4d1ff1b9fe990d26c249bf0ab0055ce54e1a684247e98a354f943e3", kill_on_drop: false }`
[INFO] [stderr]    Compiling playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/main.rs:30:17
[INFO] [stdout]    |
[INFO] [stdout] 30 | /                 /// read and check if we read successfully from the line.
[INFO] [stdout] 31 | |                 /// read_line returns an io::Result<T, Error> which is an enumeration that has
[INFO] [stdout] 32 | |                 /// two states; Ok and Err.
[INFO] [stdout]    | |___________________________________________^
[INFO] [stdout] 33 | /                 match stdin().read_line(&mut input) {
[INFO] [stdout] 34 | |                     // if read_line returned a result that was Ok
[INFO] [stdout] 35 | |                     Ok(_) => {
[INFO] [stdout] 36 | |                         entry.push_str(&input.trim_end()); // push the input onto the entry.
[INFO] [stdout] ...  |
[INFO] [stdout] 41 | |                     }
[INFO] [stdout] 42 | |                 }
[INFO] [stdout]    | |_________________- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/main.rs:44:17
[INFO] [stdout]    |
[INFO] [stdout] 44 |                   /// if the entry is equal to the code then unlock.
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 45 | /                 if entry == code {
[INFO] [stdout] 46 | |                     state = State::Unlocked;        // set state to unlock
[INFO] [stdout] 47 | |                     continue;                       // return to main loop.
[INFO] [stdout] 48 | |                 }
[INFO] [stdout]    | |_________________- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/main.rs:50:17
[INFO] [stdout]    |
[INFO] [stdout] 50 | /                 /// right when the user inputs the wrong code
[INFO] [stdout] 51 | |                 /// change the state to failed.
[INFO] [stdout]    | |_______________________________________________^
[INFO] [stdout] 52 | /                 if !code.starts_with(&entry) {
[INFO] [stdout] 53 | |                     state = State::Failed;      // set the state to failed.
[INFO] [stdout] 54 | |                     continue;                   // return to main loop
[INFO] [stdout] 55 | |                 }
[INFO] [stdout]    | |_________________- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.75s
[INFO] running `Command { std: "docker" "inspect" "9706fce4d4d1ff1b9fe990d26c249bf0ab0055ce54e1a684247e98a354f943e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9706fce4d4d1ff1b9fe990d26c249bf0ab0055ce54e1a684247e98a354f943e3", kill_on_drop: false }`
[INFO] [stdout] 9706fce4d4d1ff1b9fe990d26c249bf0ab0055ce54e1a684247e98a354f943e3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2a1e6d3778e1a97eaa5ed37902e70f3a1bc4bc4a244de84c27860cbab688695b
[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" "2a1e6d3778e1a97eaa5ed37902e70f3a1bc4bc4a244de84c27860cbab688695b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/main.rs:30:17
[INFO] [stdout]    |
[INFO] [stdout] 30 | /                 /// read and check if we read successfully from the line.
[INFO] [stdout] 31 | |                 /// read_line returns an io::Result<T, Error> which is an enumeration that has
[INFO] [stdout] 32 | |                 /// two states; Ok and Err.
[INFO] [stdout]    | |___________________________________________^
[INFO] [stdout] 33 | /                 match stdin().read_line(&mut input) {
[INFO] [stdout] 34 | |                     // if read_line returned a result that was Ok
[INFO] [stdout] 35 | |                     Ok(_) => {
[INFO] [stdout] 36 | |                         entry.push_str(&input.trim_end()); // push the input onto the entry.
[INFO] [stdout] ...  |
[INFO] [stdout] 41 | |                     }
[INFO] [stdout] 42 | |                 }
[INFO] [stdout]    | |_________________- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/main.rs:44:17
[INFO] [stdout]    |
[INFO] [stdout] 44 |                   /// if the entry is equal to the code then unlock.
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 45 | /                 if entry == code {
[INFO] [stdout] 46 | |                     state = State::Unlocked;        // set state to unlock
[INFO] [stdout] 47 | |                     continue;                       // return to main loop.
[INFO] [stdout] 48 | |                 }
[INFO] [stdout]    | |_________________- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/main.rs:50:17
[INFO] [stdout]    |
[INFO] [stdout] 50 | /                 /// right when the user inputs the wrong code
[INFO] [stdout] 51 | |                 /// change the state to failed.
[INFO] [stdout]    | |_______________________________________________^
[INFO] [stdout] 52 | /                 if !code.starts_with(&entry) {
[INFO] [stdout] 53 | |                     state = State::Failed;      // set the state to failed.
[INFO] [stdout] 54 | |                     continue;                   // return to main loop
[INFO] [stdout] 55 | |                 }
[INFO] [stdout]    | |_________________- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 7.66s
[INFO] running `Command { std: "docker" "inspect" "2a1e6d3778e1a97eaa5ed37902e70f3a1bc4bc4a244de84c27860cbab688695b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a1e6d3778e1a97eaa5ed37902e70f3a1bc4bc4a244de84c27860cbab688695b", kill_on_drop: false }`
[INFO] [stdout] 2a1e6d3778e1a97eaa5ed37902e70f3a1bc4bc4a244de84c27860cbab688695b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] aea444d92b71940d76e74b4ea50a70479c691b65338a964f20a26aba6633d6d0
[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" "aea444d92b71940d76e74b4ea50a70479c691b65338a964f20a26aba6633d6d0", kill_on_drop: false }`
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/main.rs:30:17
[INFO] [stderr]    |
[INFO] [stderr] 30 | /                 /// read and check if we read successfully from the line.
[INFO] [stderr] 31 | |                 /// read_line returns an io::Result<T, Error> which is an enumeration that has
[INFO] [stderr] 32 | |                 /// two states; Ok and Err.
[INFO] [stderr]    | |___________________________________________^
[INFO] [stderr] 33 | /                 match stdin().read_line(&mut input) {
[INFO] [stderr] 34 | |                     // if read_line returned a result that was Ok
[INFO] [stderr] 35 | |                     Ok(_) => {
[INFO] [stderr] 36 | |                         entry.push_str(&input.trim_end()); // push the input onto the entry.
[INFO] [stderr] ...  |
[INFO] [stderr] 41 | |                     }
[INFO] [stderr] 42 | |                 }
[INFO] [stderr]    | |_________________- rustdoc does not generate documentation for expressions
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr]    = help: use `//` for a plain comment
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/main.rs:44:17
[INFO] [stderr]    |
[INFO] [stderr] 44 |                   /// if the entry is equal to the code then unlock.
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 45 | /                 if entry == code {
[INFO] [stderr] 46 | |                     state = State::Unlocked;        // set state to unlock
[INFO] [stderr] 47 | |                     continue;                       // return to main loop.
[INFO] [stderr] 48 | |                 }
[INFO] [stderr]    | |_________________- rustdoc does not generate documentation for expressions
[INFO] [stderr]    |
[INFO] [stderr]    = help: use `//` for a plain comment
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/main.rs:50:17
[INFO] [stderr]    |
[INFO] [stderr] 50 | /                 /// right when the user inputs the wrong code
[INFO] [stderr] 51 | |                 /// change the state to failed.
[INFO] [stderr]    | |_______________________________________________^
[INFO] [stderr] 52 | /                 if !code.starts_with(&entry) {
[INFO] [stderr] 53 | |                     state = State::Failed;      // set the state to failed.
[INFO] [stderr] 54 | |                     continue;                   // return to main loop
[INFO] [stderr] 55 | |                 }
[INFO] [stderr]    | |_________________- rustdoc does not generate documentation for expressions
[INFO] [stderr]    |
[INFO] [stderr]    = help: use `//` for a plain comment
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/playground-f602540464593d4d)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "aea444d92b71940d76e74b4ea50a70479c691b65338a964f20a26aba6633d6d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aea444d92b71940d76e74b4ea50a70479c691b65338a964f20a26aba6633d6d0", kill_on_drop: false }`
[INFO] [stdout] aea444d92b71940d76e74b4ea50a70479c691b65338a964f20a26aba6633d6d0