[INFO] crate svpng 0.1.1 is already in cache
[INFO] testing svpng-0.1.1 against 1.45.2 for beta-1.46-1
[INFO] extracting crate svpng 0.1.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate svpng 0.1.1 on toolchain 1.45.2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "read-manifest" "--manifest-path" "Cargo.toml", 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-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1d8bb9291fee07e2fc79780929c696dcd0003baa88f3e94bd7f64f115f47a3d5
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1d8bb9291fee07e2fc79780929c696dcd0003baa88f3e94bd7f64f115f47a3d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1d8bb9291fee07e2fc79780929c696dcd0003baa88f3e94bd7f64f115f47a3d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d8bb9291fee07e2fc79780929c696dcd0003baa88f3e94bd7f64f115f47a3d5", kill_on_drop: false }`
[INFO] [stdout] 1d8bb9291fee07e2fc79780929c696dcd0003baa88f3e94bd7f64f115f47a3d5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6b711a0274e134bbb540577f9fbf51400355226dca04bf1f5604bd0afef43800
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6b711a0274e134bbb540577f9fbf51400355226dca04bf1f5604bd0afef43800", kill_on_drop: false }`
[INFO] [stderr]    Compiling svpng v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.45s
[INFO] running `Command { std: "docker" "inspect" "6b711a0274e134bbb540577f9fbf51400355226dca04bf1f5604bd0afef43800", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b711a0274e134bbb540577f9fbf51400355226dca04bf1f5604bd0afef43800", kill_on_drop: false }`
[INFO] [stdout] 6b711a0274e134bbb540577f9fbf51400355226dca04bf1f5604bd0afef43800
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b20d6a58d5ebf8c2f3b1d011f685a0bed8810dd87c7d0d2982308d18dbcee756
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b20d6a58d5ebf8c2f3b1d011f685a0bed8810dd87c7d0d2982308d18dbcee756", kill_on_drop: false }`
[INFO] [stderr]    Compiling svpng v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.98s
[INFO] running `Command { std: "docker" "inspect" "b20d6a58d5ebf8c2f3b1d011f685a0bed8810dd87c7d0d2982308d18dbcee756", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b20d6a58d5ebf8c2f3b1d011f685a0bed8810dd87c7d0d2982308d18dbcee756", kill_on_drop: false }`
[INFO] [stdout] b20d6a58d5ebf8c2f3b1d011f685a0bed8810dd87c7d0d2982308d18dbcee756
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7d237087f080f2230334cf113ff1821c47037026346175f041bb845f4b87533d
[INFO] running `Command { std: "docker" "start" "-a" "7d237087f080f2230334cf113ff1821c47037026346175f041bb845f4b87533d", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/svpng-335eaa867d95232b
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests svpng
[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
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] [stdout] test src/lib.rs - svpng (line 11) ... 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] 4  | 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 `std::ops::Try`)
[INFO] [stdout]   --> src/lib.rs:21:1
[INFO] [stdout]    |
[INFO] [stdout] 4  | / fn main() {
[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]    | | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    | | |
[INFO] [stdout]    | | cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 14 | | }
[INFO] [stdout]    | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `std::ops::Try` is not implemented for `()`
[INFO] [stdout]    = note: required by `std::ops::Try::from_error`
[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
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "7d237087f080f2230334cf113ff1821c47037026346175f041bb845f4b87533d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d237087f080f2230334cf113ff1821c47037026346175f041bb845f4b87533d", kill_on_drop: false }`
[INFO] [stdout] 7d237087f080f2230334cf113ff1821c47037026346175f041bb845f4b87533d