[INFO] cloning repository https://github.com/boustrophedon/png-concealer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/boustrophedon/png-concealer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fboustrophedon%2Fpng-concealer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fboustrophedon%2Fpng-concealer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3cf6cb856894fe5c0b47e76cd18ab52c235be237
[INFO] testing boustrophedon/png-concealer against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fboustrophedon%2Fpng-concealer" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/boustrophedon/png-concealer on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/boustrophedon/png-concealer
[INFO] finished tweaking git repo https://github.com/boustrophedon/png-concealer
[INFO] tweaked toml for git repo https://github.com/boustrophedon/png-concealer written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/boustrophedon/png-concealer already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aa33a2d49de479c72ecb1cbff60c33f70b4ea307f27b650bebc70f70aec521f9
[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" "aa33a2d49de479c72ecb1cbff60c33f70b4ea307f27b650bebc70f70aec521f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aa33a2d49de479c72ecb1cbff60c33f70b4ea307f27b650bebc70f70aec521f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa33a2d49de479c72ecb1cbff60c33f70b4ea307f27b650bebc70f70aec521f9", kill_on_drop: false }`
[INFO] [stdout] aa33a2d49de479c72ecb1cbff60c33f70b4ea307f27b650bebc70f70aec521f9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", 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] 7feb15cefa64820a8166a4b39717afa18b489addd5f157e540c19655c5a82788
[INFO] running `Command { std: "docker" "start" "-a" "7feb15cefa64820a8166a4b39717afa18b489addd5f157e540c19655c5a82788", kill_on_drop: false }`
[INFO] [stderr]    Compiling atty v0.2.10
[INFO] [stderr]    Compiling syn v0.13.10
[INFO] [stderr]    Compiling clap v2.31.2
[INFO] [stderr]    Compiling structopt-derive v0.2.8
[INFO] [stderr]    Compiling structopt v0.2.8
[INFO] [stderr]    Compiling png-concealer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/main.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input_png`
[INFO] [stdout]    --> src/main.rs:109:16
[INFO] [stdout]     |
[INFO] [stdout] 109 | fn decode_file(input_png: PathBuf, output: PathBuf) {
[INFO] [stdout]     |                ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_input_png`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `output`
[INFO] [stdout]    --> src/main.rs:109:36
[INFO] [stdout]     |
[INFO] [stdout] 109 | fn decode_file(input_png: PathBuf, output: PathBuf) {
[INFO] [stdout]     |                                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `max_length` should have an upper case name
[INFO] [stdout]   --> src/main.rs:51:11
[INFO] [stdout]    |
[INFO] [stdout] 51 |     const max_length: usize = (1<<31) - 1; // as defined in png spec
[INFO] [stdout]    |           ^^^^^^^^^^ help: convert the identifier to upper case: `MAX_LENGTH`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 27.34s
[INFO] running `Command { std: "docker" "inspect" "7feb15cefa64820a8166a4b39717afa18b489addd5f157e540c19655c5a82788", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7feb15cefa64820a8166a4b39717afa18b489addd5f157e540c19655c5a82788", kill_on_drop: false }`
[INFO] [stdout] 7feb15cefa64820a8166a4b39717afa18b489addd5f157e540c19655c5a82788
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", 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] aee06c027dfb7f492d2d2ef0f482fcdbed9c495e1673cc22b002d87f1507cab5
[INFO] running `Command { std: "docker" "start" "-a" "aee06c027dfb7f492d2d2ef0f482fcdbed9c495e1673cc22b002d87f1507cab5", kill_on_drop: false }`
[INFO] [stderr]    Compiling png-concealer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/main.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input_png`
[INFO] [stdout]    --> src/main.rs:109:16
[INFO] [stdout]     |
[INFO] [stdout] 109 | fn decode_file(input_png: PathBuf, output: PathBuf) {
[INFO] [stdout]     |                ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_input_png`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `output`
[INFO] [stdout]    --> src/main.rs:109:36
[INFO] [stdout]     |
[INFO] [stdout] 109 | fn decode_file(input_png: PathBuf, output: PathBuf) {
[INFO] [stdout]     |                                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `max_length` should have an upper case name
[INFO] [stdout]   --> src/main.rs:51:11
[INFO] [stdout]    |
[INFO] [stdout] 51 |     const max_length: usize = (1<<31) - 1; // as defined in png spec
[INFO] [stdout]    |           ^^^^^^^^^^ help: convert the identifier to upper case: `MAX_LENGTH`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.49s
[INFO] running `Command { std: "docker" "inspect" "aee06c027dfb7f492d2d2ef0f482fcdbed9c495e1673cc22b002d87f1507cab5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aee06c027dfb7f492d2d2ef0f482fcdbed9c495e1673cc22b002d87f1507cab5", kill_on_drop: false }`
[INFO] [stdout] aee06c027dfb7f492d2d2ef0f482fcdbed9c495e1673cc22b002d87f1507cab5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 031e728d6496af9e3e4747636598290c10043d60d6e032bdd49e2c590ccb7cd3
[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" "031e728d6496af9e3e4747636598290c10043d60d6e032bdd49e2c590ccb7cd3", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stdout] running 0 tests
[INFO] [stderr]  --> src/main.rs:5:1
[INFO] [stdout] 
[INFO] [stderr]   |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 5 | #[macro_use]
[INFO] [stdout] 
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `input_png`
[INFO] [stderr]    --> src/main.rs:109:16
[INFO] [stderr]     |
[INFO] [stderr] 109 | fn decode_file(input_png: PathBuf, output: PathBuf) {
[INFO] [stderr]     |                ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_input_png`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `output`
[INFO] [stderr]    --> src/main.rs:109:36
[INFO] [stderr]     |
[INFO] [stderr] 109 | fn decode_file(input_png: PathBuf, output: PathBuf) {
[INFO] [stderr]     |                                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stderr] 
[INFO] [stderr] warning: constant `max_length` should have an upper case name
[INFO] [stderr]   --> src/main.rs:51:11
[INFO] [stderr]    |
[INFO] [stderr] 51 |     const max_length: usize = (1<<31) - 1; // as defined in png spec
[INFO] [stderr]    |           ^^^^^^^^^^ help: convert the identifier to upper case: `MAX_LENGTH`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `png-concealer` (bin "png-concealer" test) generated 4 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/png_concealer-abe7f791e8ecaa82)
[INFO] running `Command { std: "docker" "inspect" "031e728d6496af9e3e4747636598290c10043d60d6e032bdd49e2c590ccb7cd3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "031e728d6496af9e3e4747636598290c10043d60d6e032bdd49e2c590ccb7cd3", kill_on_drop: false }`
[INFO] [stdout] 031e728d6496af9e3e4747636598290c10043d60d6e032bdd49e2c590ccb7cd3