[INFO] fetching crate simon 0.4.0...
[INFO] checking simon-0.4.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate simon 0.4.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate simon 0.4.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate simon 0.4.0
[INFO] tweaked toml for crates.io crate simon 0.4.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate simon 0.4.0 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate simon 0.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b593cd616b85edde079c82c5f19910a776e7d81b32a111ae205eb52101d54284
[INFO] running `Command { std: "docker" "start" "-a" "b593cd616b85edde079c82c5f19910a776e7d81b32a111ae205eb52101d54284", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b593cd616b85edde079c82c5f19910a776e7d81b32a111ae205eb52101d54284", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b593cd616b85edde079c82c5f19910a776e7d81b32a111ae205eb52101d54284", kill_on_drop: false }`
[INFO] [stdout] b593cd616b85edde079c82c5f19910a776e7d81b32a111ae205eb52101d54284
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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 -Dunmustuse_in_always_ok" "-e" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 01263dedb96c13a7274f5a5fd6b1959dea59fcfaca3954cb4ca69e146b40fb65
[INFO] running `Command { std: "docker" "start" "-a" "01263dedb96c13a7274f5a5fd6b1959dea59fcfaca3954cb4ca69e146b40fb65", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]     Checking getopts v0.2.18
[INFO] [stderr]     Checking simon v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Never>
[INFO] [stdout]    --> src/lib.rs:256:72
[INFO] [stdout]     |
[INFO] [stdout] 256 |       fn get(self, matches: &Matches) -> Result<Self::Item, Self::Error> {
[INFO] [stdout]     |  ________________________________________________________________________^
[INFO] [stdout] 257 | |         Ok(matches.opt_present(self.common.key_to_search_in_matches()))
[INFO] [stdout] 258 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Never>
[INFO] [stdout]    --> src/lib.rs:257:9
[INFO] [stdout]     |
[INFO] [stdout] 257 |         Ok(matches.opt_present(self.common.key_to_search_in_matches()))
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<String>, Never>
[INFO] [stdout]    --> src/lib.rs:289:72
[INFO] [stdout]     |
[INFO] [stdout] 289 |       fn get(self, matches: &Matches) -> Result<Self::Item, Self::Error> {
[INFO] [stdout]     |  ________________________________________________________________________^
[INFO] [stdout] 290 | |         Ok(matches.opt_str(self.common.key_to_search_in_matches()))
[INFO] [stdout] 291 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<String>, Never>
[INFO] [stdout]    --> src/lib.rs:290:9
[INFO] [stdout]     |
[INFO] [stdout] 290 |         Ok(matches.opt_str(self.common.key_to_search_in_matches()))
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<String>, Never>
[INFO] [stdout]    --> src/lib.rs:303:72
[INFO] [stdout]     |
[INFO] [stdout] 303 |       fn get(self, matches: &Matches) -> Result<Self::Item, Self::Error> {
[INFO] [stdout]     |  ________________________________________________________________________^
[INFO] [stdout] 304 | |         Ok(matches.free.clone())
[INFO] [stdout] 305 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<String>, Never>
[INFO] [stdout]    --> src/lib.rs:304:9
[INFO] [stdout]     |
[INFO] [stdout] 304 |         Ok(matches.free.clone())
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Never>
[INFO] [stdout]    --> src/lib.rs:332:29
[INFO] [stdout]     |
[INFO] [stdout] 332 |         if Never::result_ok(self.help_flag.get(matches)) {
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `simon` (lib) due to 7 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Never>
[INFO] [stdout]    --> src/lib.rs:256:72
[INFO] [stdout]     |
[INFO] [stdout] 256 |       fn get(self, matches: &Matches) -> Result<Self::Item, Self::Error> {
[INFO] [stdout]     |  ________________________________________________________________________^
[INFO] [stdout] 257 | |         Ok(matches.opt_present(self.common.key_to_search_in_matches()))
[INFO] [stdout] 258 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Never>
[INFO] [stdout]    --> src/lib.rs:257:9
[INFO] [stdout]     |
[INFO] [stdout] 257 |         Ok(matches.opt_present(self.common.key_to_search_in_matches()))
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<String>, Never>
[INFO] [stdout]    --> src/lib.rs:289:72
[INFO] [stdout]     |
[INFO] [stdout] 289 |       fn get(self, matches: &Matches) -> Result<Self::Item, Self::Error> {
[INFO] [stdout]     |  ________________________________________________________________________^
[INFO] [stdout] 290 | |         Ok(matches.opt_str(self.common.key_to_search_in_matches()))
[INFO] [stdout] 291 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<String>, Never>
[INFO] [stdout]    --> src/lib.rs:290:9
[INFO] [stdout]     |
[INFO] [stdout] 290 |         Ok(matches.opt_str(self.common.key_to_search_in_matches()))
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<String>, Never>
[INFO] [stdout]    --> src/lib.rs:303:72
[INFO] [stdout]     |
[INFO] [stdout] 303 |       fn get(self, matches: &Matches) -> Result<Self::Item, Self::Error> {
[INFO] [stdout]     |  ________________________________________________________________________^
[INFO] [stdout] 304 | |         Ok(matches.free.clone())
[INFO] [stdout] 305 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<String>, Never>
[INFO] [stdout]    --> src/lib.rs:304:9
[INFO] [stdout]     |
[INFO] [stdout] 304 |         Ok(matches.free.clone())
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<bool, Never>
[INFO] [stdout]    --> src/lib.rs:332:29
[INFO] [stdout]     |
[INFO] [stdout] 332 |         if Never::result_ok(self.help_flag.get(matches)) {
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `simon` (lib test) due to 7 previous errors
[INFO] running `Command { std: "docker" "inspect" "01263dedb96c13a7274f5a5fd6b1959dea59fcfaca3954cb4ca69e146b40fb65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01263dedb96c13a7274f5a5fd6b1959dea59fcfaca3954cb4ca69e146b40fb65", kill_on_drop: false }`
[INFO] [stdout] 01263dedb96c13a7274f5a5fd6b1959dea59fcfaca3954cb4ca69e146b40fb65
