[INFO] fetching crate sscanf 0.4.4...
[INFO] checking sscanf-0.4.4 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate sscanf 0.4.4 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate sscanf 0.4.4
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate sscanf 0.4.4
[INFO] tweaked toml for crates.io crate sscanf 0.4.4 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate sscanf 0.4.4 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 sscanf 0.4.4 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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 27e41876ff7b00bbe707e5ce1361d3eb0c4721bd2c6e8814cbe3e36ffaa49ebc
[INFO] running `Command { std: "docker" "start" "-a" "27e41876ff7b00bbe707e5ce1361d3eb0c4721bd2c6e8814cbe3e36ffaa49ebc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "27e41876ff7b00bbe707e5ce1361d3eb0c4721bd2c6e8814cbe3e36ffaa49ebc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27e41876ff7b00bbe707e5ce1361d3eb0c4721bd2c6e8814cbe3e36ffaa49ebc", kill_on_drop: false }`
[INFO] [stdout] 27e41876ff7b00bbe707e5ce1361d3eb0c4721bd2c6e8814cbe3e36ffaa49ebc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 46c6f4cea4672675ac122afb285ada63f7d6ded17b79b195b76cb5dfa8ba6977
[INFO] running `Command { std: "docker" "start" "-a" "46c6f4cea4672675ac122afb285ada63f7d6ded17b79b195b76cb5dfa8ba6977", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-width v0.1.12
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling syn v2.0.108
[INFO] [stderr]    Compiling const_format_proc_macros v0.2.31
[INFO] [stderr]     Checking const_format v0.2.31
[INFO] [stderr]    Compiling sscanf_macro v0.4.4
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]     Checking sscanf v0.4.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking trybuild v1.0.113
[INFO] [stdout] error: this type will no longer be must used: Result<invalid_regex_representation::Test, Infallible>
[INFO] [stdout]   --> tests/should_panic.rs:12:57
[INFO] [stdout]    |
[INFO] [stdout] 12 |           fn from_str(_: &str) -> Result<Self, Self::Err> {
[INFO] [stdout]    |  _________________________________________________________^
[INFO] [stdout] 13 | |             Ok(Test)
[INFO] [stdout] 14 | |         }
[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<invalid_regex_representation::Test, Infallible>
[INFO] [stdout]   --> tests/should_panic.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 13 |             Ok(Test)
[INFO] [stdout]    |             ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, FromStrFailedError<invalid_regex_representation::Test>>, invalid_regex_representation::Test>
[INFO] [stdout]   --> tests/should_panic.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     sscanf!("hi", "{Test}").unwrap();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<invalid_regex_representation::Test, FromStrFailedError<invalid_regex_representation::Test>>
[INFO] [stdout]   --> tests/should_panic.rs:19:21
[INFO] [stdout]    |
[INFO] [stdout] 19 |     sscanf!("hi", "{Test}").unwrap();
[INFO] [stdout]    |                     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sscanf` (test "should_panic") due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, FromStrFailedError<String>>, String>
[INFO] [stdout]   --> tests/test.rs:19:18
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let output = sscanf!(input, "Test {usize} {f32} {{}} {}!", std::string::String);
[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<String, FromStrFailedError<String>>
[INFO] [stdout]   --> tests/test.rs:19:64
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let output = sscanf!(input, "Test {usize} {f32} {{}} {}!", std::string::String);
[INFO] [stdout]    |                                                                ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<NoRegex, Infallible>
[INFO] [stdout]    --> tests/test.rs:180:58
[INFO] [stdout]     |
[INFO] [stdout] 180 |           fn from_str(_s: &str) -> Result<Self, Self::Err> {
[INFO] [stdout]     |  __________________________________________________________^
[INFO] [stdout] 181 | |             Ok(NoRegex)
[INFO] [stdout] 182 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<NoRegex, Infallible>
[INFO] [stdout]    --> tests/test.rs:181:13
[INFO] [stdout]     |
[INFO] [stdout] 181 |             Ok(NoRegex)
[INFO] [stdout]     |             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, FromStrFailedError<NoRegex>>, NoRegex>
[INFO] [stdout]    --> tests/test.rs:184:18
[INFO] [stdout]     |
[INFO] [stdout] 184 |     let parsed = sscanf!(input, "{NoRegex:/.*/}");
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<NoRegex, FromStrFailedError<NoRegex>>
[INFO] [stdout]    --> tests/test.rs:184:35
[INFO] [stdout]     |
[INFO] [stdout] 184 |     let parsed = sscanf!(input, "{NoRegex:/.*/}");
[INFO] [stdout]     |                                   ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, FromStrFailedError<String>>, String>
[INFO] [stdout]    --> tests/test.rs:190:32
[INFO] [stdout]     |
[INFO] [stdout] 190 |     #[derive(Debug, PartialEq, FromScanf)]
[INFO] [stdout]     |                                ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, FromStrFailedError<String>>
[INFO] [stdout]    --> tests/test.rs:193:15
[INFO] [stdout]     |
[INFO] [stdout] 193 |         name: String,
[INFO] [stdout]     |               ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, FromStrFailedError<String>>, String>
[INFO] [stdout]    --> tests/test.rs:217:13
[INFO] [stdout]     |
[INFO] [stdout] 217 |         s = sscanf!(input, "{String}").unwrap();
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, FromStrFailedError<String>>
[INFO] [stdout]    --> tests/test.rs:217:30
[INFO] [stdout]     |
[INFO] [stdout] 217 |         s = sscanf!(input, "{String}").unwrap();
[INFO] [stdout]     |                              ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, FromStrFailedError<String>>, String>
[INFO] [stdout]    --> tests/test.rs:247:9
[INFO] [stdout]     |
[INFO] [stdout] 247 |         sscanf!(input, "{String}").map_err(|err| err.to_string())?;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, FromStrFailedError<String>>
[INFO] [stdout]    --> tests/test.rs:247:26
[INFO] [stdout]     |
[INFO] [stdout] 247 |         sscanf!(input, "{String}").map_err(|err| err.to_string())?;
[INFO] [stdout]     |                          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, FromStrFailedError<String>>, String>
[INFO] [stdout]   --> tests/derive/enum.rs:72:14
[INFO] [stdout]    |
[INFO] [stdout] 72 |     #[derive(FromScanf, Debug, PartialEq)]
[INFO] [stdout]    |              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, FromStrFailedError<String>>
[INFO] [stdout]   --> tests/derive/enum.rs:77:16
[INFO] [stdout]    |
[INFO] [stdout] 77 |         String(String),
[INFO] [stdout]    |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, FromStrFailedError<String>>, String>
[INFO] [stdout]   --> tests/derive/field.rs:29:14
[INFO] [stdout]    |
[INFO] [stdout] 29 |     #[derive(FromScanf, Debug, PartialEq)]
[INFO] [stdout]    |              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, FromStrFailedError<String>>
[INFO] [stdout]   --> tests/derive/field.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |         b: String,
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, FromStrFailedError<String>>, String>
[INFO] [stdout]    --> tests/derive/field.rs:230:14
[INFO] [stdout]     |
[INFO] [stdout] 230 |     #[derive(FromScanf, Debug, PartialEq)]
[INFO] [stdout]     |              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, FromStrFailedError<String>>
[INFO] [stdout]    --> tests/derive/field.rs:236:15
[INFO] [stdout]     |
[INFO] [stdout] 236 |         name: String,
[INFO] [stdout]     |               ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, FromStrFailedError<String>>, String>
[INFO] [stdout]    --> tests/derive/field.rs:253:14
[INFO] [stdout]     |
[INFO] [stdout] 253 |     #[derive(FromScanf, Debug, PartialEq)]
[INFO] [stdout]     |              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, FromStrFailedError<String>>
[INFO] [stdout]    --> tests/derive/field.rs:260:15
[INFO] [stdout]     |
[INFO] [stdout] 260 |         name: String,
[INFO] [stdout]     |               ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, FromStrFailedError<String>>, String>
[INFO] [stdout]    --> tests/derive/field.rs:275:14
[INFO] [stdout]     |
[INFO] [stdout] 275 |     #[derive(FromScanf, Debug, PartialEq)]
[INFO] [stdout]     |              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, FromStrFailedError<String>>
[INFO] [stdout]    --> tests/derive/field.rs:278:15
[INFO] [stdout]     |
[INFO] [stdout] 278 |         name: String,
[INFO] [stdout]     |               ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, FromStrFailedError<String>>, String>
[INFO] [stdout]   --> tests/derive/struct.rs:29:14
[INFO] [stdout]    |
[INFO] [stdout] 29 |     #[derive(FromScanf, Debug, PartialEq)]
[INFO] [stdout]    |              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, FromStrFailedError<String>>
[INFO] [stdout]   --> tests/derive/struct.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |         b: String,
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, FromStrFailedError<String>>, String>
[INFO] [stdout]   --> tests/derive/struct.rs:49:14
[INFO] [stdout]    |
[INFO] [stdout] 49 |     #[derive(FromScanf, Debug, PartialEq)]
[INFO] [stdout]    |              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, FromStrFailedError<String>>
[INFO] [stdout]   --> tests/derive/struct.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 |         b: String,
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, FromStrFailedError<String>>, String>
[INFO] [stdout]   --> tests/derive/struct.rs:69:14
[INFO] [stdout]    |
[INFO] [stdout] 69 |     #[derive(FromScanf, Debug, PartialEq)]
[INFO] [stdout]    |              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, FromStrFailedError<String>>
[INFO] [stdout]   --> tests/derive/struct.rs:73:12
[INFO] [stdout]    |
[INFO] [stdout] 73 |         b: String,
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: ControlFlow<Result<Infallible, FromStrFailedError<String>>, String>
[INFO] [stdout]   --> tests/derive/struct.rs:89:14
[INFO] [stdout]    |
[INFO] [stdout] 89 |     #[derive(FromScanf, Debug, PartialEq)]
[INFO] [stdout]    |              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, FromStrFailedError<String>>
[INFO] [stdout]   --> tests/derive/struct.rs:91:27
[INFO] [stdout]    |
[INFO] [stdout] 91 |     struct TestStruct(u8, String, isize, f32);
[INFO] [stdout]    |                           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sscanf` (test "test") due to 30 previous errors
[INFO] running `Command { std: "docker" "inspect" "46c6f4cea4672675ac122afb285ada63f7d6ded17b79b195b76cb5dfa8ba6977", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46c6f4cea4672675ac122afb285ada63f7d6ded17b79b195b76cb5dfa8ba6977", kill_on_drop: false }`
[INFO] [stdout] 46c6f4cea4672675ac122afb285ada63f7d6ded17b79b195b76cb5dfa8ba6977
