[INFO] fetching crate svpng 0.1.1...
[INFO] testing svpng-0.1.1 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate svpng 0.1.1 into /workspace/builds/worker-20/source
[INFO] validating manifest of crates.io crate svpng 0.1.1 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate svpng 0.1.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate svpng 0.1.1
[INFO] tweaked toml for crates.io crate svpng 0.1.1 written to /workspace/builds/worker-20/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d24495467b33e63f3d9239b7f52aeb2e299aefc3d258d5409cfb051dac9f3bdc
[INFO] running `Command { std: "docker" "start" "-a" "d24495467b33e63f3d9239b7f52aeb2e299aefc3d258d5409cfb051dac9f3bdc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d24495467b33e63f3d9239b7f52aeb2e299aefc3d258d5409cfb051dac9f3bdc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d24495467b33e63f3d9239b7f52aeb2e299aefc3d258d5409cfb051dac9f3bdc", kill_on_drop: false }`
[INFO] [stdout] d24495467b33e63f3d9239b7f52aeb2e299aefc3d258d5409cfb051dac9f3bdc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 22acbd3e758527b68867684e6899b8a968abf2cfdda78e43c5eee36a6894e82e
[INFO] running `Command { std: "docker" "start" "-a" "22acbd3e758527b68867684e6899b8a968abf2cfdda78e43c5eee36a6894e82e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling svpng v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.72s
[INFO] running `Command { std: "docker" "inspect" "22acbd3e758527b68867684e6899b8a968abf2cfdda78e43c5eee36a6894e82e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22acbd3e758527b68867684e6899b8a968abf2cfdda78e43c5eee36a6894e82e", kill_on_drop: false }`
[INFO] [stdout] 22acbd3e758527b68867684e6899b8a968abf2cfdda78e43c5eee36a6894e82e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e2e4e227fcf76d24d370735fb78925ab2a7323964940e7ff8fcf48f118cd1e8e
[INFO] running `Command { std: "docker" "start" "-a" "e2e4e227fcf76d24d370735fb78925ab2a7323964940e7ff8fcf48f118cd1e8e", kill_on_drop: false }`
[INFO] [stderr]    Compiling svpng v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.40s
[INFO] [stderr]   Executable unittests src/lib.rs (/opt/rustwide/target/debug/deps/svpng-88dad894373f73b8)
[INFO] running `Command { std: "docker" "inspect" "e2e4e227fcf76d24d370735fb78925ab2a7323964940e7ff8fcf48f118cd1e8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2e4e227fcf76d24d370735fb78925ab2a7323964940e7ff8fcf48f118cd1e8e", kill_on_drop: false }`
[INFO] [stdout] e2e4e227fcf76d24d370735fb78925ab2a7323964940e7ff8fcf48f118cd1e8e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4497fc54860868b35fa1698c336b844eeaa4f96b06d819a846b7663b4c7b7e10
[INFO] running `Command { std: "docker" "start" "-a" "4497fc54860868b35fa1698c336b844eeaa4f96b06d819a846b7663b4c7b7e10", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/svpng-88dad894373f73b8)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::crc32_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests svpng
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - svpng (line 11) - compile ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - svpng (line 11) stdout ----
[INFO] [stdout] error[E0423]: expected function, found crate `svpng`
[INFO] [stdout]   --> src/lib.rs:21:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | svpng("rgb.png", 256, 256, &pix, false)?;
[INFO] [stdout]    | ^^^^^ not a function
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this function instead
[INFO] [stdout]    |
[INFO] [stdout] 3  | use svpng::svpng;
[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:21:40
[INFO] [stdout]    |
[INFO] [stdout] 4  |   fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_11_0() {
[INFO] [stdout]    |  ______________________________________-
[INFO] [stdout] 5  | | let mut pix = Vec::new();
[INFO] [stdout] 6  | | for y in 0..=255 {
[INFO] [stdout] 7  | |     for x in 0..=255 {
[INFO] [stdout] ...  |
[INFO] [stdout] 13 | | svpng("rgb.png", 256, 256, &pix, false)?;
[INFO] [stdout]    | |                                        ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 14 | | } _doctest_main_src_lib_rs_11_0() }
[INFO] [stdout]    | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<_>` is not implemented for `()`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 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 - svpng (line 11)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.06s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "4497fc54860868b35fa1698c336b844eeaa4f96b06d819a846b7663b4c7b7e10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4497fc54860868b35fa1698c336b844eeaa4f96b06d819a846b7663b4c7b7e10", kill_on_drop: false }`
[INFO] [stdout] 4497fc54860868b35fa1698c336b844eeaa4f96b06d819a846b7663b4c7b7e10