[INFO] fetching crate whats-a-png 0.1.1...
[INFO] testing whats-a-png-0.1.1 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate whats-a-png 0.1.1 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate whats-a-png 0.1.1
[INFO] finished tweaking crates.io crate whats-a-png 0.1.1
[INFO] tweaked toml for crates.io crate whats-a-png 0.1.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate whats-a-png 0.1.1 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate whats-a-png 0.1.1 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" "+beta-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 30726615465bdc31c7d91140919dbb27d0c6ccb0596707496c362b811976df45
[INFO] running `Command { std: "docker" "start" "-a" "30726615465bdc31c7d91140919dbb27d0c6ccb0596707496c362b811976df45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "30726615465bdc31c7d91140919dbb27d0c6ccb0596707496c362b811976df45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30726615465bdc31c7d91140919dbb27d0c6ccb0596707496c362b811976df45", kill_on_drop: false }`
[INFO] [stdout] 30726615465bdc31c7d91140919dbb27d0c6ccb0596707496c362b811976df45
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 70d33fe5c91b12fe1a494834a17936f12e376e87fd272a87341285e853be09c4
[INFO] running `Command { std: "docker" "start" "-a" "70d33fe5c91b12fe1a494834a17936f12e376e87fd272a87341285e853be09c4", kill_on_drop: false }`
[INFO] [stderr]    Compiling whats-a-png v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `info` is never read
[INFO] [stdout]   --> src/png.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub struct PngImage {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 33 |     pub info: PNGInfo,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple fields are never read
[INFO] [stdout]   --> src/png.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub struct PNGInfo {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 46 |     pub width: u32,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 47 |     pub height: u32,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 48 |     pub bit_depth: u8,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 49 |     pub color_type: u8,
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout] 50 |     pub compression_method: u8,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 51 |     pub filter_method: u8,
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout] 52 |     pub interlace_method: u8,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `Command { std: "docker" "inspect" "70d33fe5c91b12fe1a494834a17936f12e376e87fd272a87341285e853be09c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70d33fe5c91b12fe1a494834a17936f12e376e87fd272a87341285e853be09c4", kill_on_drop: false }`
[INFO] [stdout] 70d33fe5c91b12fe1a494834a17936f12e376e87fd272a87341285e853be09c4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0c12d2fbc70cd06977227985007a489c10fa4eb453876bf1014189582bb8e2cb
[INFO] running `Command { std: "docker" "start" "-a" "0c12d2fbc70cd06977227985007a489c10fa4eb453876bf1014189582bb8e2cb", kill_on_drop: false }`
[INFO] [stderr]    Compiling whats-a-png v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `info` is never read
[INFO] [stdout]   --> src/png.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub struct PngImage {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 33 |     pub info: PNGInfo,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple fields are never read
[INFO] [stdout]   --> src/png.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub struct PNGInfo {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 46 |     pub width: u32,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 47 |     pub height: u32,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 48 |     pub bit_depth: u8,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 49 |     pub color_type: u8,
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout] 50 |     pub compression_method: u8,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 51 |     pub filter_method: u8,
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout] 52 |     pub interlace_method: u8,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `Command { std: "docker" "inspect" "0c12d2fbc70cd06977227985007a489c10fa4eb453876bf1014189582bb8e2cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c12d2fbc70cd06977227985007a489c10fa4eb453876bf1014189582bb8e2cb", kill_on_drop: false }`
[INFO] [stdout] 0c12d2fbc70cd06977227985007a489c10fa4eb453876bf1014189582bb8e2cb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ce53ea6a7ad630115fae095103da9af38e711b2fd7f0016eda1a5b7233fea975
[INFO] running `Command { std: "docker" "start" "-a" "ce53ea6a7ad630115fae095103da9af38e711b2fd7f0016eda1a5b7233fea975", kill_on_drop: false }`
[INFO] [stderr] warning: field `info` is never read
[INFO] [stderr]   --> src/png.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 32 | pub struct PngImage {
[INFO] [stderr]    |            -------- field in this struct
[INFO] [stderr] 33 |     pub info: PNGInfo,
[INFO] [stderr]    |         ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: multiple fields are never read
[INFO] [stderr]   --> src/png.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 45 | pub struct PNGInfo {
[INFO] [stderr]    |            ------- fields in this struct
[INFO] [stderr] 46 |     pub width: u32,
[INFO] [stderr]    |         ^^^^^
[INFO] [stderr] 47 |     pub height: u32,
[INFO] [stderr]    |         ^^^^^^
[INFO] [stderr] 48 |     pub bit_depth: u8,
[INFO] [stderr]    |         ^^^^^^^^^
[INFO] [stderr] 49 |     pub color_type: u8,
[INFO] [stderr]    |         ^^^^^^^^^^
[INFO] [stderr] 50 |     pub compression_method: u8,
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 51 |     pub filter_method: u8,
[INFO] [stderr]    |         ^^^^^^^^^^^^^
[INFO] [stderr] 52 |     pub interlace_method: u8,
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `whats-a-png` (bin "whats-a-png" test) generated 2 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/whats_a_png-710437d2a90cc85a)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test png::tests::test_new ... ok
[INFO] [stdout] test png::tests::test_chunks ... ok
[INFO] [stdout] test png::tests::test_read_image_data ... ok
[INFO] [stdout] test png::tests::test_save_image ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- png::tests::test_save_image stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'png::tests::test_save_image' (28) panicked at src/png.rs:319:37:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: SaveOperationFailed
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5f445debb762 - std::backtrace_rs::backtrace::libunwind::trace::h16acf28769fcd909
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x5f445debb762 - std::backtrace_rs::backtrace::trace_unsynchronized::hb5541aa5d4f92513
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x5f445debb762 - std::sys::backtrace::_print_fmt::h8ac8268cb667a306
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x5f445debb762 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h47627beda0767f4c
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x5f445decb7ff - core::fmt::rt::Argument::fmt::h686a01ad57c1c92a
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x5f445decb7ff - core::fmt::write::h8a63064c67176fd8
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/core/src/fmt/mod.rs:1469:25
[INFO] [stdout]    6:     0x5f445de89143 - std::io::default_write_fmt::hd4797e693c0ec256
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x5f445de89143 - std::io::Write::write_fmt::h791e240ad2720c99
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/io/mod.rs:1954:13
[INFO] [stdout]    8:     0x5f445de950d2 - std::sys::backtrace::BacktraceLock::print::h4634d27c0afbaebb
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x5f445de99b6f - std::panicking::default_hook::{{closure}}::h23e0299d4738b766
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/panicking.rs:301:27
[INFO] [stdout]   10:     0x5f445de99a01 - std::panicking::default_hook::hfeec6294e8751b62
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/panicking.rs:325:9
[INFO] [stdout]   11:     0x5f445de5babe - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h3f5a16438cee2b4e
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/alloc/src/boxed.rs:2019:9
[INFO] [stdout]   12:     0x5f445de5babe - test::test_main_with_exit_callback::{{closure}}::h9214498cef9aafc5
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x5f445de9a17f - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hdb18da3e68df7464
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/alloc/src/boxed.rs:2019:9
[INFO] [stdout]   14:     0x5f445de9a17f - std::panicking::panic_with_hook::hd57cd463d793ed79
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/panicking.rs:842:13
[INFO] [stdout]   15:     0x5f445de99fda - std::panicking::panic_handler::{{closure}}::hddd6216c3fddee3b
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/panicking.rs:707:13
[INFO] [stdout]   16:     0x5f445de95209 - std::sys::backtrace::__rust_end_short_backtrace::h5e7a56f283378525
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/sys/backtrace.rs:174:18
[INFO] [stdout]   17:     0x5f445de7d1cd - __rustc[256c90bb7e548b45]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/panicking.rs:698:5
[INFO] [stdout]   18:     0x5f445ded3070 - core::panicking::panic_fmt::hf19c198748ef6a95
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x5f445ded2846 - core::result::unwrap_failed::he81173b5792ad6b0
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/core/src/result.rs:1862:5
[INFO] [stdout]   20:     0x5f445de34190 - core::result::Result<T,E>::unwrap::h32389b30624516a3
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/core/src/result.rs:1233:23
[INFO] [stdout]   21:     0x5f445de34190 - whats_a_png::png::tests::test_save_image::hf8e7df629d317499
[INFO] [stdout]                                at /opt/rustwide/workdir/src/png.rs:319:37
[INFO] [stdout]   22:     0x5f445de34227 - whats_a_png::png::tests::test_save_image::{{closure}}::he0cd73d84e59491a
[INFO] [stdout]                                at /opt/rustwide/workdir/src/png.rs:317:25
[INFO] [stdout]   23:     0x5f445de37966 - core::ops::function::FnOnce::call_once::h175343d3be7c2a0f
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x5f445de5b90b - core::ops::function::FnOnce::call_once::h43f43c5185cf39c2
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x5f445de5b90b - test::__rust_begin_short_backtrace::hc4fa634eb2764bdc
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/test/src/lib.rs:663:18
[INFO] [stdout]   26:     0x5f445de6ff28 - test::run_test_in_process::{{closure}}::h9f4b799a5211b72a
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/test/src/lib.rs:686:74
[INFO] [stdout]   27:     0x5f445de6ff28 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::ha572bf7dc5230a8f
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   28:     0x5f445de6ff28 - std::panicking::catch_unwind::do_call::hfd6ff51f25dd177b
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/panicking.rs:590:40
[INFO] [stdout]   29:     0x5f445de6ff28 - std::panicking::catch_unwind::h8609b446221def5f
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/panicking.rs:553:19
[INFO] [stdout]   30:     0x5f445de6ff28 - std::panic::catch_unwind::h362f73cc48531e26
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/panic.rs:359:14
[INFO] [stdout]   31:     0x5f445de6ff28 - test::run_test_in_process::hf52fd21d696aae67
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/test/src/lib.rs:686:27
[INFO] [stdout]   32:     0x5f445de6ff28 - test::run_test::{{closure}}::h7e780b8354e6d007
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/test/src/lib.rs:607:43
[INFO] [stdout]   33:     0x5f445de48cf4 - test::run_test::{{closure}}::hdc2695f2276aad3e
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/test/src/lib.rs:637:41
[INFO] [stdout]   34:     0x5f445de48cf4 - std::sys::backtrace::__rust_begin_short_backtrace::h2555b2113ed90fc9
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]   35:     0x5f445de4c62a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h99800d480987dfb6
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/thread/mod.rs:562:17
[INFO] [stdout]   36:     0x5f445de4c62a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hbbb69b5294b2221b
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   37:     0x5f445de4c62a - std::panicking::catch_unwind::do_call::h495689350c27df20
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/panicking.rs:590:40
[INFO] [stdout]   38:     0x5f445de4c62a - std::panicking::catch_unwind::hf22437c51d1b3740
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/panicking.rs:553:19
[INFO] [stdout]   39:     0x5f445de4c62a - std::panic::catch_unwind::habda1a57de8231f8
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/panic.rs:359:14
[INFO] [stdout]   40:     0x5f445de4c62a - std::thread::Builder::spawn_unchecked_::{{closure}}::h5833d8dda8c7e80b
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/thread/mod.rs:560:30
[INFO] [stdout]   41:     0x5f445de4c62a - core::ops::function::FnOnce::call_once{{vtable.shim}}::ha2910283a5058402
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x5f445de904ff - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::he4d85cb537521972
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/alloc/src/boxed.rs:2005:9
[INFO] [stdout]   43:     0x5f445de904ff - std::sys::thread::unix::Thread::new::thread_start::hbaf586a9e50a98cd
[INFO] [stdout]                                at /rustc/3b4dd9bf1410f8da6329baa36ce5e37673cbbd1f/library/std/src/sys/thread/unix.rs:126:17
[INFO] [stdout]   44:     0x762aca53caa4 - <unknown>
[INFO] [stdout]   45:     0x762aca5c9a64 - clone
[INFO] [stdout]   46:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     png::tests::test_save_image
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 3 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin whats-a-png`
[INFO] running `Command { std: "docker" "inspect" "ce53ea6a7ad630115fae095103da9af38e711b2fd7f0016eda1a5b7233fea975", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce53ea6a7ad630115fae095103da9af38e711b2fd7f0016eda1a5b7233fea975", kill_on_drop: false }`
[INFO] [stdout] ce53ea6a7ad630115fae095103da9af38e711b2fd7f0016eda1a5b7233fea975
