[INFO] fetching crate conversion 0.1.0...
[INFO] checking conversion-0.1.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate conversion 0.1.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate conversion 0.1.0
[INFO] finished tweaking crates.io crate conversion 0.1.0
[INFO] tweaked toml for crates.io crate conversion 0.1.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate conversion 0.1.0 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 17 packages to latest compatible versions
[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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] e8b9e3a91cac2e698f46a2032b2fc462b4dce0403a3fee95270c2beeeef5da43
[INFO] running `Command { std: "docker" "start" "-a" "e8b9e3a91cac2e698f46a2032b2fc462b4dce0403a3fee95270c2beeeef5da43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e8b9e3a91cac2e698f46a2032b2fc462b4dce0403a3fee95270c2beeeef5da43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8b9e3a91cac2e698f46a2032b2fc462b4dce0403a3fee95270c2beeeef5da43", kill_on_drop: false }`
[INFO] [stdout] e8b9e3a91cac2e698f46a2032b2fc462b4dce0403a3fee95270c2beeeef5da43
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 965b10b48102db03160c56c031cd5d52f304a417c050e42bb02256f89876385a
[INFO] running `Command { std: "docker" "start" "-a" "965b10b48102db03160c56c031cd5d52f304a417c050e42bb02256f89876385a", kill_on_drop: false }`
[INFO] [stderr]     Checking conversion v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/converter/iter.rs:85:5
[INFO] [stdout]    |
[INFO] [stdout] 85 | /     {
[INFO] [stdout] 86 | |         buf.extend((self.f)(item));
[INFO] [stdout] 87 | |         Ok(1)
[INFO] [stdout] 88 | |     }
[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<usize, Infallible>
[INFO] [stdout]   --> src/converter/iter.rs:87:9
[INFO] [stdout]    |
[INFO] [stdout] 87 |         Ok(1)
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/converter/map.rs:81:5
[INFO] [stdout]    |
[INFO] [stdout] 81 | /     {
[INFO] [stdout] 82 | |         buf.extend([(self.f)(item)]);
[INFO] [stdout] 83 | |         Ok(1)
[INFO] [stdout] 84 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/converter/map.rs:83:9
[INFO] [stdout]    |
[INFO] [stdout] 83 |         Ok(1)
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/converter/encoding/utf16.rs:140:5
[INFO] [stdout]     |
[INFO] [stdout] 140 | /     {
[INFO] [stdout] 141 | |         let mut tmp_buf = [0u16; 2];
[INFO] [stdout] 142 | |         let len = item.encode_utf16(&mut tmp_buf).len();
[INFO] [stdout] 143 | |         buf.extend(tmp_buf.into_iter().take(len));
[INFO] [stdout] 144 | |         Ok(len)
[INFO] [stdout] 145 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/converter/encoding/utf16.rs:144:9
[INFO] [stdout]     |
[INFO] [stdout] 144 |         Ok(len)
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/converter/encoding/utf16.rs:255:5
[INFO] [stdout]     |
[INFO] [stdout] 255 | /     {
[INFO] [stdout] 256 | |         let mut tmp_buf = [0u16; 2];
[INFO] [stdout] 257 | |         let len = item.encode_utf16(&mut tmp_buf).len();
[INFO] [stdout] 258 | |         for w in tmp_buf.into_iter().take(len) {
[INFO] [stdout] ...   |
[INFO] [stdout] 261 | |         Ok(len * 2)
[INFO] [stdout] 262 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/converter/encoding/utf16.rs:261:9
[INFO] [stdout]     |
[INFO] [stdout] 261 |         Ok(len * 2)
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/converter/encoding/utf16.rs:372:5
[INFO] [stdout]     |
[INFO] [stdout] 372 | /     {
[INFO] [stdout] 373 | |         let mut tmp_buf = [0u16; 2];
[INFO] [stdout] 374 | |         let len = item.encode_utf16(&mut tmp_buf).len();
[INFO] [stdout] 375 | |         for w in tmp_buf.into_iter().take(len) {
[INFO] [stdout] ...   |
[INFO] [stdout] 378 | |         Ok(len * 2)
[INFO] [stdout] 379 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/converter/encoding/utf16.rs:378:9
[INFO] [stdout]     |
[INFO] [stdout] 378 |         Ok(len * 2)
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/converter/encoding/utf32.rs:98:5
[INFO] [stdout]     |
[INFO] [stdout]  98 | /     {
[INFO] [stdout]  99 | |         buf.extend([item as u32]);
[INFO] [stdout] 100 | |         Ok(1)
[INFO] [stdout] 101 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/converter/encoding/utf32.rs:100:9
[INFO] [stdout]     |
[INFO] [stdout] 100 |         Ok(1)
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/converter/encoding/utf32.rs:200:5
[INFO] [stdout]     |
[INFO] [stdout] 200 | /     {
[INFO] [stdout] 201 | |         buf.extend((item as u32).to_be_bytes());
[INFO] [stdout] 202 | |         Ok(4)
[INFO] [stdout] 203 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/converter/encoding/utf32.rs:202:9
[INFO] [stdout]     |
[INFO] [stdout] 202 |         Ok(4)
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/converter/encoding/utf32.rs:302:5
[INFO] [stdout]     |
[INFO] [stdout] 302 | /     {
[INFO] [stdout] 303 | |         buf.extend((item as u32).to_le_bytes());
[INFO] [stdout] 304 | |         Ok(4)
[INFO] [stdout] 305 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/converter/encoding/utf32.rs:304:9
[INFO] [stdout]     |
[INFO] [stdout] 304 |         Ok(4)
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/converter/encoding/utf8.rs:150:5
[INFO] [stdout]     |
[INFO] [stdout] 150 | /     {
[INFO] [stdout] 151 | |         let mut tmp_buf = [0u8; 4];
[INFO] [stdout] 152 | |         let len = item.encode_utf8(&mut tmp_buf).len();
[INFO] [stdout] 153 | |         buf.extend(tmp_buf.into_iter().take(len));
[INFO] [stdout] 154 | |         Ok(len)
[INFO] [stdout] 155 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/converter/encoding/utf8.rs:154:9
[INFO] [stdout]     |
[INFO] [stdout] 154 |         Ok(len)
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `conversion` (lib) due to 18 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "965b10b48102db03160c56c031cd5d52f304a417c050e42bb02256f89876385a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "965b10b48102db03160c56c031cd5d52f304a417c050e42bb02256f89876385a", kill_on_drop: false }`
[INFO] [stdout] 965b10b48102db03160c56c031cd5d52f304a417c050e42bb02256f89876385a
