[INFO] fetching crate png-achunk 0.1.0... [INFO] testing png-achunk-0.1.0 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-8 [INFO] extracting crate png-achunk 0.1.0 into /workspace/builds/worker-0-tc1/source [INFO] removed /workspace/builds/worker-0-tc1/source/rust-toolchain.toml [INFO] started tweaking crates.io crate png-achunk 0.1.0 [INFO] finished tweaking crates.io crate png-achunk 0.1.0 [INFO] tweaked toml for crates.io crate png-achunk 0.1.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml [INFO] validating manifest of crates.io crate png-achunk 0.1.0 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Locking 57 packages to latest compatible versions [INFO] [stderr] Adding image v0.24.9 (available: v0.25.8) [INFO] [stderr] Adding png v0.17.16 (available: v0.18.0) [INFO] [stderr] Adding thiserror v1.0.69 (available: v2.0.17) [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded color_quant v1.1.0 [INFO] [stderr] Downloaded gif v0.13.3 [INFO] [stderr] Downloaded bytemuck v1.24.0 [INFO] [stderr] Downloaded zune-inflate v0.2.54 [INFO] [stderr] Downloaded ascii v1.1.0 [INFO] [stderr] Downloaded bit_field v0.10.3 [INFO] [stderr] Downloaded half v2.7.1 [INFO] [stderr] Downloaded lebe v0.5.3 [INFO] [stderr] Downloaded qoi v0.4.1 [INFO] [stderr] Downloaded exr v1.74.0 [INFO] [stderr] Downloaded weezl v0.1.12 [INFO] [stderr] Downloaded jpeg-decoder v0.3.2 [INFO] [stderr] Downloaded tiff v0.9.1 [INFO] [stderr] Downloaded image v0.24.9 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 33ed9923c7996432cbc51db634902df5e3880160f3c8854ff3caf6c3d46bdba9 [INFO] running `Command { std: "docker" "start" "-a" "33ed9923c7996432cbc51db634902df5e3880160f3c8854ff3caf6c3d46bdba9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "33ed9923c7996432cbc51db634902df5e3880160f3c8854ff3caf6c3d46bdba9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "33ed9923c7996432cbc51db634902df5e3880160f3c8854ff3caf6c3d46bdba9", kill_on_drop: false }` [INFO] [stdout] 33ed9923c7996432cbc51db634902df5e3880160f3c8854ff3caf6c3d46bdba9 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "-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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] c438fecb993eb28942758aa0e8b635c0d4e410bc8c880d5dfd9985dc87903938 [INFO] running `Command { std: "docker" "start" "-a" "c438fecb993eb28942758aa0e8b635c0d4e410bc8c880d5dfd9985dc87903938", kill_on_drop: false }` [INFO] [stderr] Compiling simd-adler32 v0.3.7 [INFO] [stderr] Compiling adler2 v2.0.1 [INFO] [stderr] Compiling crc32fast v1.5.0 [INFO] [stderr] Compiling zerocopy v0.8.27 [INFO] [stderr] Compiling either v1.15.0 [INFO] [stderr] Compiling weezl v0.1.12 [INFO] [stderr] Compiling bit_field v0.10.3 [INFO] [stderr] Compiling lebe v0.5.3 [INFO] [stderr] Compiling num-traits v0.2.19 [INFO] [stderr] Compiling bytemuck v1.24.0 [INFO] [stderr] Compiling bitflags v1.3.2 [INFO] [stderr] Compiling color_quant v1.1.0 [INFO] [stderr] Compiling byteorder v1.5.0 [INFO] [stderr] Compiling syn v2.0.110 [INFO] [stderr] Compiling ascii v1.1.0 [INFO] [stderr] Compiling miniz_oxide v0.8.9 [INFO] [stderr] Compiling fdeflate v0.3.7 [INFO] [stderr] Compiling zune-inflate v0.2.54 [INFO] [stderr] Compiling qoi v0.4.1 [INFO] [stderr] Compiling rayon v1.11.0 [INFO] [stderr] Compiling gif v0.13.3 [INFO] [stderr] Compiling flate2 v1.1.5 [INFO] [stderr] Compiling png v0.17.16 [INFO] [stderr] Compiling jpeg-decoder v0.3.2 [INFO] [stderr] Compiling zerocopy-derive v0.8.27 [INFO] [stderr] Compiling thiserror-impl v1.0.69 [INFO] [stderr] Compiling tiff v0.9.1 [INFO] [stderr] Compiling thiserror v1.0.69 [INFO] [stderr] Compiling half v2.7.1 [INFO] [stderr] Compiling exr v1.74.0 [INFO] [stderr] Compiling image v0.24.9 [INFO] [stderr] Compiling png-achunk v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 29.15s [INFO] running `Command { std: "docker" "inspect" "c438fecb993eb28942758aa0e8b635c0d4e410bc8c880d5dfd9985dc87903938", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c438fecb993eb28942758aa0e8b635c0d4e410bc8c880d5dfd9985dc87903938", kill_on_drop: false }` [INFO] [stdout] c438fecb993eb28942758aa0e8b635c0d4e410bc8c880d5dfd9985dc87903938 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "-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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] c8622ccd819f4fe1d7a0deb3292d6c88c4a40e36f423e4619c302cfad1c097db [INFO] running `Command { std: "docker" "start" "-a" "c8622ccd819f4fe1d7a0deb3292d6c88c4a40e36f423e4619c302cfad1c097db", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.177 [INFO] [stderr] Compiling getrandom v0.3.4 [INFO] [stderr] Compiling once_cell v1.21.3 [INFO] [stderr] Compiling tempfile v3.23.0 [INFO] [stderr] Compiling png-achunk v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 3.07s [INFO] running `Command { std: "docker" "inspect" "c8622ccd819f4fe1d7a0deb3292d6c88c4a40e36f423e4619c302cfad1c097db", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c8622ccd819f4fe1d7a0deb3292d6c88c4a40e36f423e4619c302cfad1c097db", kill_on_drop: false }` [INFO] [stdout] c8622ccd819f4fe1d7a0deb3292d6c88c4a40e36f423e4619c302cfad1c097db [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "-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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 94c5114ed0c6c542f1026e8579caee8d2fabf4649afd4e034f103ff1d4bd6c7f [INFO] running `Command { std: "docker" "start" "-a" "94c5114ed0c6c542f1026e8579caee8d2fabf4649afd4e034f103ff1d4bd6c7f", kill_on_drop: false }` [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.12s [INFO] [stderr] Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/png_achunk-dcea1fa31f1b5f8c) [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stderr] Running tests/test.rs (/opt/rustwide/target/debug/deps/test-ea165891f75cc387) [INFO] [stdout] [INFO] [stdout] running 1 test [INFO] [stdout] test test ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s [INFO] [stdout] [INFO] [stderr] Doc-tests png_achunk [INFO] [stdout] [INFO] [stdout] running 3 tests [INFO] [stdout] test src/lib.rs - (line 53) ... FAILED [INFO] [stdout] test src/lib.rs - (line 29) ... FAILED [INFO] [stdout] test src/lib.rs - (line 15) ... FAILED [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] [INFO] [stdout] ---- src/lib.rs - (line 53) stdout ---- [INFO] [stdout] error: expected item, found `$` [INFO] [stdout] --> src/lib.rs:54:1 [INFO] [stdout] | [INFO] [stdout] 54 | $ gcc test.c -L. -l:libpng_achunk.a -lm -o test [INFO] [stdout] | ^ expected item [INFO] [stdout] | [INFO] [stdout] = note: for a full list of items that can appear in modules, see [INFO] [stdout] [INFO] [stdout] error: aborting due to 1 previous error [INFO] [stdout] [INFO] [stdout] Couldn't compile the test. [INFO] [stdout] ---- src/lib.rs - (line 29) stdout ---- [INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`) [INFO] [stdout] --> src/lib.rs:32:65 [INFO] [stdout] | [INFO] [stdout] 30 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_29_0() { [INFO] [stdout] | ---------------------------------- this function should return `Result` or `Option` to accept `?` [INFO] [stdout] 31 | // Decode image and ancillary chunks [INFO] [stdout] 32 | let (image, chunks) = png_achunk::Decoder::from_file("test.png")?.decode_all()?; [INFO] [stdout] | ^ cannot use the `?` operator in a function that returns `()` [INFO] [stdout] | [INFO] [stdout] help: consider adding return type [INFO] [stdout] | [INFO] [stdout] 30 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_29_0() -> Result<(), Box> { [INFO] [stdout] 31 | // Decode image and ancillary chunks [INFO] [stdout] ... [INFO] [stdout] 34 | let chunks = png_achunk::Decoder::from_file("test.png")?.decode_ancillary_chunks()?; [INFO] [stdout] 35 + Ok(()) [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`) [INFO] [stdout] --> src/lib.rs:32:79 [INFO] [stdout] | [INFO] [stdout] 30 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_29_0() { [INFO] [stdout] | ---------------------------------- this function should return `Result` or `Option` to accept `?` [INFO] [stdout] 31 | // Decode image and ancillary chunks [INFO] [stdout] 32 | let (image, chunks) = png_achunk::Decoder::from_file("test.png")?.decode_all()?; [INFO] [stdout] | ^ cannot use the `?` operator in a function that returns `()` [INFO] [stdout] | [INFO] [stdout] help: consider adding return type [INFO] [stdout] | [INFO] [stdout] 30 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_29_0() -> Result<(), Box> { [INFO] [stdout] 31 | // Decode image and ancillary chunks [INFO] [stdout] ... [INFO] [stdout] 34 | let chunks = png_achunk::Decoder::from_file("test.png")?.decode_ancillary_chunks()?; [INFO] [stdout] 35 + Ok(()) [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`) [INFO] [stdout] --> src/lib.rs:34:56 [INFO] [stdout] | [INFO] [stdout] 30 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_29_0() { [INFO] [stdout] | ---------------------------------- this function should return `Result` or `Option` to accept `?` [INFO] [stdout] ... [INFO] [stdout] 34 | let chunks = png_achunk::Decoder::from_file("test.png")?.decode_ancillary_chunks()?; [INFO] [stdout] | ^ cannot use the `?` operator in a function that returns `()` [INFO] [stdout] | [INFO] [stdout] help: consider adding return type [INFO] [stdout] | [INFO] [stdout] 30 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_29_0() -> Result<(), Box> { [INFO] [stdout] 31 | // Decode image and ancillary chunks [INFO] [stdout] ... [INFO] [stdout] 34 | let chunks = png_achunk::Decoder::from_file("test.png")?.decode_ancillary_chunks()?; [INFO] [stdout] 35 + Ok(()) [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`) [INFO] [stdout] --> src/lib.rs:34:83 [INFO] [stdout] | [INFO] [stdout] 30 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_29_0() { [INFO] [stdout] | ---------------------------------- this function should return `Result` or `Option` to accept `?` [INFO] [stdout] ... [INFO] [stdout] 34 | let chunks = png_achunk::Decoder::from_file("test.png")?.decode_ancillary_chunks()?; [INFO] [stdout] | ^ cannot use the `?` operator in a function that returns `()` [INFO] [stdout] | [INFO] [stdout] help: consider adding return type [INFO] [stdout] | [INFO] [stdout] 30 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_29_0() -> Result<(), Box> { [INFO] [stdout] 31 | // Decode image and ancillary chunks [INFO] [stdout] ... [INFO] [stdout] 34 | let chunks = png_achunk::Decoder::from_file("test.png")?.decode_ancillary_chunks()?; [INFO] [stdout] 35 + Ok(()) [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] error: aborting due to 4 previous errors [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0277`. [INFO] [stdout] Couldn't compile the test. [INFO] [stdout] ---- src/lib.rs - (line 15) stdout ---- [INFO] [stdout] error[E0423]: expected value, found crate `image` [INFO] [stdout] --> src/lib.rs:23:1 [INFO] [stdout] | [INFO] [stdout] 23 | image.write_with_encoder( [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] help: use the path separator to refer to an item [INFO] [stdout] | [INFO] [stdout] 23 - image.write_with_encoder( [INFO] [stdout] 23 + image::write_with_encoder( [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`) [INFO] [stdout] --> src/lib.rs:20:60 [INFO] [stdout] | [INFO] [stdout] 16 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_15_0() { [INFO] [stdout] | ---------------------------------- this function should return `Result` or `Option` to accept `?` [INFO] [stdout] ... [INFO] [stdout] 20 | let chunk_type = png_achunk::ChunkType::from_ascii(&"teST")?; [INFO] [stdout] | ^ cannot use the `?` operator in a function that returns `()` [INFO] [stdout] | [INFO] [stdout] help: consider adding return type [INFO] [stdout] | [INFO] [stdout] 16 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_15_0() -> Result<(), Box> { [INFO] [stdout] 17 | // Create custom chunk [INFO] [stdout] ... [INFO] [stdout] 25 | )?; [INFO] [stdout] 26 + Ok(()) [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`) [INFO] [stdout] --> src/lib.rs:21:62 [INFO] [stdout] | [INFO] [stdout] 16 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_15_0() { [INFO] [stdout] | ---------------------------------- this function should return `Result` or `Option` to accept `?` [INFO] [stdout] ... [INFO] [stdout] 21 | let chunk = png_achunk::Chunk::new(chunk_type, vec![4, 5, 6])?; [INFO] [stdout] | ^ cannot use the `?` operator in a function that returns `()` [INFO] [stdout] | [INFO] [stdout] help: consider adding return type [INFO] [stdout] | [INFO] [stdout] 16 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_15_0() -> Result<(), Box> { [INFO] [stdout] 17 | // Create custom chunk [INFO] [stdout] ... [INFO] [stdout] 25 | )?; [INFO] [stdout] 26 + Ok(()) [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`) [INFO] [stdout] --> src/lib.rs:24:49 [INFO] [stdout] | [INFO] [stdout] 16 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_15_0() { [INFO] [stdout] | ---------------------------------- this function should return `Result` or `Option` to accept `?` [INFO] [stdout] ... [INFO] [stdout] 24 | png_achunk::Encoder::new_to_file("test.png")?.with_custom_chunk(chunk.clone()), [INFO] [stdout] | ^ cannot use the `?` operator in a function that returns `()` [INFO] [stdout] | [INFO] [stdout] help: consider adding return type [INFO] [stdout] | [INFO] [stdout] 16 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_15_0() -> Result<(), Box> { [INFO] [stdout] 17 | // Create custom chunk [INFO] [stdout] ... [INFO] [stdout] 25 | )?; [INFO] [stdout] 26 + Ok(()) [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] error: aborting due to 4 previous errors [INFO] [stdout] [INFO] [stdout] Some errors have detailed explanations: E0277, E0423. [INFO] [stdout] For more information about an error, try `rustc --explain E0277`. [INFO] [stdout] Couldn't compile the test. [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] src/lib.rs - (line 15) [INFO] [stdout] src/lib.rs - (line 29) [INFO] [stdout] src/lib.rs - (line 53) [INFO] [stdout] [INFO] [stdout] test result: FAILED. 0 passed; 3 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.27s [INFO] [stdout] [INFO] [stderr] error: doctest failed, to rerun pass `--doc` [INFO] running `Command { std: "docker" "inspect" "94c5114ed0c6c542f1026e8579caee8d2fabf4649afd4e034f103ff1d4bd6c7f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "94c5114ed0c6c542f1026e8579caee8d2fabf4649afd4e034f103ff1d4bd6c7f", kill_on_drop: false }` [INFO] [stdout] 94c5114ed0c6c542f1026e8579caee8d2fabf4649afd4e034f103ff1d4bd6c7f