[INFO] fetching crate framez 0.3.1...
[INFO] checking framez-0.3.1 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate framez 0.3.1 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate framez 0.3.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate framez 0.3.1
[INFO] tweaked toml for crates.io crate framez 0.3.1 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate framez 0.3.1 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 framez 0.3.1 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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 438b48ff5c2ef8049c8049c6ac13ad3fbd99656fc7e66bc4cbc7ba16f0e6e477
[INFO] running `Command { std: "docker" "start" "-a" "438b48ff5c2ef8049c8049c6ac13ad3fbd99656fc7e66bc4cbc7ba16f0e6e477", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "438b48ff5c2ef8049c8049c6ac13ad3fbd99656fc7e66bc4cbc7ba16f0e6e477", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "438b48ff5c2ef8049c8049c6ac13ad3fbd99656fc7e66bc4cbc7ba16f0e6e477", kill_on_drop: false }`
[INFO] [stdout] 438b48ff5c2ef8049c8049c6ac13ad3fbd99656fc7e66bc4cbc7ba16f0e6e477
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 1ddf7cd070db3ca6f74ab4d3fe693f16e67c19fd7b394a7d578aebb9a4a4b97d
[INFO] running `Command { std: "docker" "start" "-a" "1ddf7cd070db3ca6f74ab4d3fe693f16e67c19fd7b394a7d578aebb9a4a4b97d", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-core v0.3.31
[INFO] [stderr]    Compiling embedded-io-async v0.6.1
[INFO] [stderr]     Checking futures-task v0.3.31
[INFO] [stderr]     Checking embedded-io v0.6.1
[INFO] [stderr]     Checking regex-syntax v0.8.5
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking overload v0.1.1
[INFO] [stderr]     Checking futures-io v0.3.31
[INFO] [stderr]    Compiling embedded-io-adapters v0.6.1
[INFO] [stderr]     Checking parking_lot_core v0.9.11
[INFO] [stderr]     Checking signal-hook-registry v1.4.5
[INFO] [stderr]     Checking socket2 v0.5.10
[INFO] [stderr]     Checking mio v1.0.4
[INFO] [stderr]     Checking tracing-log v0.2.0
[INFO] [stderr]    Compiling syn v2.0.102
[INFO] [stderr]     Checking tracing v0.1.41
[INFO] [stderr]     Checking futures-channel v0.3.31
[INFO] [stderr]     Checking thread_local v1.1.8
[INFO] [stderr]     Checking nu-ansi-term v0.46.0
[INFO] [stderr]     Checking futures-util v0.3.31
[INFO] [stderr]     Checking parking_lot v0.12.4
[INFO] [stderr]     Checking matchers v0.1.0
[INFO] [stderr]     Checking regex-automata v0.4.9
[INFO] [stderr]     Checking futures v0.3.31
[INFO] [stderr]     Checking framez v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<Option<(&[u8], usize)>, Infallible>
[INFO] [stdout]   --> src/codec/bytes.rs:30:99
[INFO] [stdout]    |
[INFO] [stdout] 30 |       fn decode(&mut self, src: &'buf mut [u8]) -> Result<Option<(Self::Item, usize)>, Self::Error> {
[INFO] [stdout]    |  ___________________________________________________________________________________________________^
[INFO] [stdout] 31 | |         Ok(Some((src, src.len())))
[INFO] [stdout] 32 | |     }
[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<Option<(&[u8], usize)>, Infallible>
[INFO] [stdout]   --> src/codec/bytes.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         Ok(Some((src, src.len())))
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<(&[u8], usize)>, Infallible>
[INFO] [stdout]   --> src/codec/delimiter.rs:45:99
[INFO] [stdout]    |
[INFO] [stdout] 45 |       fn decode(&mut self, src: &'buf mut [u8]) -> Result<Option<(Self::Item, usize)>, Self::Error> {
[INFO] [stdout]    |  ___________________________________________________________________________________________________^
[INFO] [stdout] 46 | |         if src.len() < self.delimiter.len() {
[INFO] [stdout] 47 | |             return Ok(None);
[INFO] [stdout] ...  |
[INFO] [stdout] 79 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<(&[u8], usize)>, Infallible>
[INFO] [stdout]   --> src/codec/delimiter.rs:47:20
[INFO] [stdout]    |
[INFO] [stdout] 47 |             return Ok(None);
[INFO] [stdout]    |                    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<(&[u8], usize)>, Infallible>
[INFO] [stdout]   --> src/codec/delimiter.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 | /         match self.delimiter.last() {
[INFO] [stdout] 51 | |             None => {
[INFO] [stdout] 52 | |                 let bytes = &src[..self.seen + 1];
[INFO] [stdout] 53 | |                 let item = (bytes, self.seen + 1);
[INFO] [stdout] ...  |
[INFO] [stdout] 78 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<(&[u8], usize)>, Infallible>
[INFO] [stdout]   --> src/codec/delimiter.rs:51:21
[INFO] [stdout]    |
[INFO] [stdout] 51 |               None => {
[INFO] [stdout]    |  _____________________^
[INFO] [stdout] 52 | |                 let bytes = &src[..self.seen + 1];
[INFO] [stdout] 53 | |                 let item = (bytes, self.seen + 1);
[INFO] [stdout] ...  |
[INFO] [stdout] 56 | |             }
[INFO] [stdout]    | |_____________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<(&[u8], usize)>, Infallible>
[INFO] [stdout]   --> src/codec/delimiter.rs:55:17
[INFO] [stdout]    |
[INFO] [stdout] 55 |                 Ok(Some(item))
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<(&[u8], usize)>, Infallible>
[INFO] [stdout]   --> src/codec/delimiter.rs:57:32
[INFO] [stdout]    |
[INFO] [stdout] 57 |               Some(last_byte) => {
[INFO] [stdout]    |  ________________________________^
[INFO] [stdout] 58 | |                 while self.seen < src.len() {
[INFO] [stdout] 59 | |                     if src[self.seen] == *last_byte {
[INFO] [stdout] 60 | |                         let src_delimiter =
[INFO] [stdout] ...  |
[INFO] [stdout] 76 | |                 Ok(None)
[INFO] [stdout] 77 | |             }
[INFO] [stdout]    | |_____________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<(&[u8], usize)>, Infallible>
[INFO] [stdout]   --> src/codec/delimiter.rs:69:36
[INFO] [stdout]    |
[INFO] [stdout] 69 | ...                   return Ok(Some(item));
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<(&[u8], usize)>, Infallible>
[INFO] [stdout]   --> src/codec/delimiter.rs:76:17
[INFO] [stdout]    |
[INFO] [stdout] 76 |                 Ok(None)
[INFO] [stdout]    |                 ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<(&[u8], usize)>, Infallible>
[INFO] [stdout]   --> src/codec/lines.rs:37:99
[INFO] [stdout]    |
[INFO] [stdout] 37 |       fn decode(&mut self, src: &'buf mut [u8]) -> Result<Option<(Self::Item, usize)>, Self::Error> {
[INFO] [stdout]    |  ___________________________________________________________________________________________________^
[INFO] [stdout] 38 | |         while self.seen < src.len() {
[INFO] [stdout] 39 | |             if src[self.seen] == b'\n' {
[INFO] [stdout] 40 | |                 let line_bytes = match &src[..self.seen].last() {
[INFO] [stdout] ...  |
[INFO] [stdout] 55 | |         Ok(None)
[INFO] [stdout] 56 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<(&[u8], usize)>, Infallible>
[INFO] [stdout]   --> src/codec/lines.rs:49:24
[INFO] [stdout]    |
[INFO] [stdout] 49 |                 return Ok(Some(item));
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<(&[u8], usize)>, Infallible>
[INFO] [stdout]   --> src/codec/lines.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |         Ok(None)
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Option<(&[u8], usize)>, Infallible>
[INFO] [stdout]    --> src/codec/lines.rs:155:15
[INFO] [stdout]     |
[INFO] [stdout] 155 |         match Decoder::decode(&mut self.inner, src) {
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/mock.rs:15:76
[INFO] [stdout]    |
[INFO] [stdout] 15 |       async fn read(&mut self, buf: &mut [u8]) -> Result<usize, Self::Error> {
[INFO] [stdout]    |  ____________________________________________________________________________^
[INFO] [stdout] 16 | |         Ok(buf.len())
[INFO] [stdout] 17 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/mock.rs:15:76
[INFO] [stdout]    |
[INFO] [stdout] 15 |       async fn read(&mut self, buf: &mut [u8]) -> Result<usize, Self::Error> {
[INFO] [stdout]    |  ____________________________________________________________________________^
[INFO] [stdout] 16 | |         Ok(buf.len())
[INFO] [stdout] 17 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/mock.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |         Ok(buf.len())
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/mock.rs:21:73
[INFO] [stdout]    |
[INFO] [stdout] 21 |       async fn write(&mut self, buf: &[u8]) -> Result<usize, Self::Error> {
[INFO] [stdout]    |  _________________________________________________________________________^
[INFO] [stdout] 22 | |         Ok(buf.len())
[INFO] [stdout] 23 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/mock.rs:21:73
[INFO] [stdout]    |
[INFO] [stdout] 21 |       async fn write(&mut self, buf: &[u8]) -> Result<usize, Self::Error> {
[INFO] [stdout]    |  _________________________________________________________________________^
[INFO] [stdout] 22 | |         Ok(buf.len())
[INFO] [stdout] 23 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/mock.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |         Ok(buf.len())
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `framez` (lib) due to 20 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "1ddf7cd070db3ca6f74ab4d3fe693f16e67c19fd7b394a7d578aebb9a4a4b97d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ddf7cd070db3ca6f74ab4d3fe693f16e67c19fd7b394a7d578aebb9a4a4b97d", kill_on_drop: false }`
[INFO] [stdout] 1ddf7cd070db3ca6f74ab4d3fe693f16e67c19fd7b394a7d578aebb9a4a4b97d
