[INFO] cloning repository https://github.com/anuvratsingh/pngme
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/anuvratsingh/pngme" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanuvratsingh%2Fpngme", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanuvratsingh%2Fpngme'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ca3997392b5455b0292bdc7544d60664ab58630a
[INFO] checking anuvratsingh/pngme against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanuvratsingh%2Fpngme" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/anuvratsingh/pngme
[INFO] finished tweaking git repo https://github.com/anuvratsingh/pngme
[INFO] tweaked toml for git repo https://github.com/anuvratsingh/pngme written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/anuvratsingh/pngme 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 git repo https://github.com/anuvratsingh/pngme 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] [stderr]     Blocking waiting for file lock on package cache
[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] fd37249797eb261a517b5b0026c06b384fe2711a9324b09651155ca09bf15d4b
[INFO] running `Command { std: "docker" "start" "-a" "fd37249797eb261a517b5b0026c06b384fe2711a9324b09651155ca09bf15d4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd37249797eb261a517b5b0026c06b384fe2711a9324b09651155ca09bf15d4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd37249797eb261a517b5b0026c06b384fe2711a9324b09651155ca09bf15d4b", kill_on_drop: false }`
[INFO] [stdout] fd37249797eb261a517b5b0026c06b384fe2711a9324b09651155ca09bf15d4b
[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] 57c7c89ff7edf207a6f7d268329654af50dda289f9dc696b5a1c1e3d1b550728
[INFO] running `Command { std: "docker" "start" "-a" "57c7c89ff7edf207a6f7d268329654af50dda289f9dc696b5a1c1e3d1b550728", kill_on_drop: false }`
[INFO] [stderr]     Checking crc-catalog v2.1.0
[INFO] [stderr]     Checking crc v3.0.0
[INFO] [stderr]     Checking pngme v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<ChunkType, Infallible>
[INFO] [stdout]   --> src/chunk.rs:66:13
[INFO] [stdout]    |
[INFO] [stdout] 66 |             ChunkType::try_from([value[4], value[5], value[6], value[7]]).expect("Invalid");
[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<char, Infallible>
[INFO] [stdout]   --> src/chunk_type.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 |         if char::try_from(self.reserved)
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<char, Infallible>
[INFO] [stdout]   --> src/chunk_type.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |         if char::try_from(self.ancillary)
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<char, Infallible>
[INFO] [stdout]   --> src/chunk_type.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 |         if char::try_from(self.private)
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<char, Infallible>
[INFO] [stdout]   --> src/chunk_type.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 |         if char::try_from(self.reserved)
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<char, Infallible>
[INFO] [stdout]   --> src/chunk_type.rs:63:12
[INFO] [stdout]    |
[INFO] [stdout] 63 |         if char::try_from(self.safe_to_copy)
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ChunkType, Infallible>
[INFO] [stdout]   --> src/chunk_type.rs:77:62
[INFO] [stdout]    |
[INFO] [stdout] 77 |       fn try_from(value: [u8; 4]) -> Result<Self, Self::Error> {
[INFO] [stdout]    |  ______________________________________________________________^
[INFO] [stdout] 78 | |         match value {
[INFO] [stdout] 79 | |             [length, chunk_type, chunk_data, crc] => Ok(Self {
[INFO] [stdout] 80 | |                 ancillary: length,
[INFO] [stdout] ...  |
[INFO] [stdout] 86 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ChunkType, Infallible>
[INFO] [stdout]   --> src/chunk_type.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 78 | /         match value {
[INFO] [stdout] 79 | |             [length, chunk_type, chunk_data, crc] => Ok(Self {
[INFO] [stdout] 80 | |                 ancillary: length,
[INFO] [stdout] 81 | |                 private: chunk_type,
[INFO] [stdout] ...  |
[INFO] [stdout] 84 | |             }),
[INFO] [stdout] 85 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ChunkType, Infallible>
[INFO] [stdout]   --> src/chunk_type.rs:79:54
[INFO] [stdout]    |
[INFO] [stdout] 79 |               [length, chunk_type, chunk_data, crc] => Ok(Self {
[INFO] [stdout]    |  ______________________________________________________^
[INFO] [stdout] 80 | |                 ancillary: length,
[INFO] [stdout] 81 | |                 private: chunk_type,
[INFO] [stdout] 82 | |                 reserved: chunk_data,
[INFO] [stdout] 83 | |                 safe_to_copy: crc,
[INFO] [stdout] 84 | |             }),
[INFO] [stdout]    | |______________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ChunkType, Infallible>
[INFO] [stdout]   --> src/png.rs:89:30
[INFO] [stdout]    |
[INFO] [stdout] 89 |               let chunk_type = ChunkType::try_from([
[INFO] [stdout]    |  ______________________________^
[INFO] [stdout] 90 | |                 chunk_type_drain[0],
[INFO] [stdout] 91 | |                 chunk_type_drain[1],
[INFO] [stdout] 92 | |                 chunk_type_drain[2],
[INFO] [stdout] 93 | |                 chunk_type_drain[3],
[INFO] [stdout] 94 | |             ])
[INFO] [stdout]    | |______________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pngme` (lib) due to 10 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<chunk_type::ChunkType, Infallible>
[INFO] [stdout]   --> src/chunk.rs:66:13
[INFO] [stdout]    |
[INFO] [stdout] 66 |             ChunkType::try_from([value[4], value[5], value[6], value[7]]).expect("Invalid");
[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<char, Infallible>
[INFO] [stdout]   --> src/chunk_type.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 |         if char::try_from(self.reserved)
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<char, Infallible>
[INFO] [stdout]   --> src/chunk_type.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 |         if char::try_from(self.ancillary)
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<char, Infallible>
[INFO] [stdout]   --> src/chunk_type.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 |         if char::try_from(self.private)
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<char, Infallible>
[INFO] [stdout]   --> src/chunk_type.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 |         if char::try_from(self.reserved)
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<char, Infallible>
[INFO] [stdout]   --> src/chunk_type.rs:63:12
[INFO] [stdout]    |
[INFO] [stdout] 63 |         if char::try_from(self.safe_to_copy)
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<chunk_type::ChunkType, Infallible>
[INFO] [stdout]   --> src/chunk_type.rs:77:62
[INFO] [stdout]    |
[INFO] [stdout] 77 |       fn try_from(value: [u8; 4]) -> Result<Self, Self::Error> {
[INFO] [stdout]    |  ______________________________________________________________^
[INFO] [stdout] 78 | |         match value {
[INFO] [stdout] 79 | |             [length, chunk_type, chunk_data, crc] => Ok(Self {
[INFO] [stdout] 80 | |                 ancillary: length,
[INFO] [stdout] ...  |
[INFO] [stdout] 86 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<chunk_type::ChunkType, Infallible>
[INFO] [stdout]   --> src/chunk_type.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 78 | /         match value {
[INFO] [stdout] 79 | |             [length, chunk_type, chunk_data, crc] => Ok(Self {
[INFO] [stdout] 80 | |                 ancillary: length,
[INFO] [stdout] 81 | |                 private: chunk_type,
[INFO] [stdout] ...  |
[INFO] [stdout] 84 | |             }),
[INFO] [stdout] 85 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<chunk_type::ChunkType, Infallible>
[INFO] [stdout]   --> src/chunk_type.rs:79:54
[INFO] [stdout]    |
[INFO] [stdout] 79 |               [length, chunk_type, chunk_data, crc] => Ok(Self {
[INFO] [stdout]    |  ______________________________________________________^
[INFO] [stdout] 80 | |                 ancillary: length,
[INFO] [stdout] 81 | |                 private: chunk_type,
[INFO] [stdout] 82 | |                 reserved: chunk_data,
[INFO] [stdout] 83 | |                 safe_to_copy: crc,
[INFO] [stdout] 84 | |             }),
[INFO] [stdout]    | |______________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<chunk_type::ChunkType, Infallible>
[INFO] [stdout]    --> src/chunk_type.rs:147:22
[INFO] [stdout]     |
[INFO] [stdout] 147 |         let actual = ChunkType::try_from([82, 117, 83, 116]).unwrap();
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<chunk_type::ChunkType, Infallible>
[INFO] [stdout]    --> src/chunk_type.rs:153:24
[INFO] [stdout]     |
[INFO] [stdout] 153 |         let expected = ChunkType::try_from([82, 117, 83, 116]).unwrap();
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<chunk_type::ChunkType, Infallible>
[INFO] [stdout]    --> src/chunk_type.rs:229:39
[INFO] [stdout]     |
[INFO] [stdout] 229 |         let chunk_type_1: ChunkType = TryFrom::try_from([82, 117, 83, 116]).unwrap();
[INFO] [stdout]     |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<chunk_type::ChunkType, Infallible>
[INFO] [stdout]   --> src/png.rs:89:30
[INFO] [stdout]    |
[INFO] [stdout] 89 |               let chunk_type = ChunkType::try_from([
[INFO] [stdout]    |  ______________________________^
[INFO] [stdout] 90 | |                 chunk_type_drain[0],
[INFO] [stdout] 91 | |                 chunk_type_drain[1],
[INFO] [stdout] 92 | |                 chunk_type_drain[2],
[INFO] [stdout] 93 | |                 chunk_type_drain[3],
[INFO] [stdout] 94 | |             ])
[INFO] [stdout]    | |______________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pngme` (lib test) due to 13 previous errors
[INFO] running `Command { std: "docker" "inspect" "57c7c89ff7edf207a6f7d268329654af50dda289f9dc696b5a1c1e3d1b550728", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57c7c89ff7edf207a6f7d268329654af50dda289f9dc696b5a1c1e3d1b550728", kill_on_drop: false }`
[INFO] [stdout] 57c7c89ff7edf207a6f7d268329654af50dda289f9dc696b5a1c1e3d1b550728
