[INFO] fetching crate bing-wallpaper-url 0.3.0...
[INFO] testing bing-wallpaper-url-0.3.0 against beta-2023-04-20 for beta-1.70-1
[INFO] extracting crate bing-wallpaper-url 0.3.0 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate bing-wallpaper-url 0.3.0 on toolchain beta-2023-04-20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-04-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bing-wallpaper-url 0.3.0
[INFO] finished tweaking crates.io crate bing-wallpaper-url 0.3.0
[INFO] tweaked toml for crates.io crate bing-wallpaper-url 0.3.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate crates.io crate bing-wallpaper-url 0.3.0 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-2023-04-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d17c5bfd972b1593365a4d0d413b3ced2e256406d76d8a5db3ae7cbce11a34c9
[INFO] running `Command { std: "docker" "start" "-a" "d17c5bfd972b1593365a4d0d413b3ced2e256406d76d8a5db3ae7cbce11a34c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d17c5bfd972b1593365a4d0d413b3ced2e256406d76d8a5db3ae7cbce11a34c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d17c5bfd972b1593365a4d0d413b3ced2e256406d76d8a5db3ae7cbce11a34c9", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0fb6d46fe6a6a7805115ecb4d2ed37029aa05fa5e30258e1cceee72860b1067b
[INFO] running `Command { std: "docker" "start" "-a" "0fb6d46fe6a6a7805115ecb4d2ed37029aa05fa5e30258e1cceee72860b1067b", kill_on_drop: false }`
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[INFO] [stderr]    Compiling bing-wallpaper-url v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 56.93s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: html5ever v0.24.1
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "0fb6d46fe6a6a7805115ecb4d2ed37029aa05fa5e30258e1cceee72860b1067b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0fb6d46fe6a6a7805115ecb4d2ed37029aa05fa5e30258e1cceee72860b1067b", kill_on_drop: false }`
[INFO] [stdout] 0fb6d46fe6a6a7805115ecb4d2ed37029aa05fa5e30258e1cceee72860b1067b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b02b6bbc3937899d568df869a9fe564d491d97857bb672c4df760a81cccd2506
[INFO] running `Command { std: "docker" "start" "-a" "b02b6bbc3937899d568df869a9fe564d491d97857bb672c4df760a81cccd2506", kill_on_drop: false }`
[INFO] [stderr]    Compiling bing-wallpaper-url v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.30s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: html5ever v0.24.1
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "b02b6bbc3937899d568df869a9fe564d491d97857bb672c4df760a81cccd2506", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b02b6bbc3937899d568df869a9fe564d491d97857bb672c4df760a81cccd2506", kill_on_drop: false }`
[INFO] [stdout] b02b6bbc3937899d568df869a9fe564d491d97857bb672c4df760a81cccd2506
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 293843503d09df3c7de876c50a810711b607ed5d7a0ce1225063353f51002f3b
[INFO] running `Command { std: "docker" "start" "-a" "293843503d09df3c7de876c50a810711b607ed5d7a0ce1225063353f51002f3b", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.25s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: html5ever v0.24.1
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/bing_wallpaper_url-16cb29d00ae35f8b)
[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 unittests src/bin/bing-wallpaper-url.rs (/opt/rustwide/target/debug/deps/bing_wallpaper_url-210e44a3813c67d5)
[INFO] [stderr]    Doc-tests bing-wallpaper-url
[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] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - get_url (line 6) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - get_url (line 6) stdout ----
[INFO] [stdout] Test executable failed (exit status: 101).
[INFO] [stdout] 
[INFO] [stdout] stderr:
[INFO] [stdout] thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Network(reqwest::Error { kind: Request, url: Url { scheme: "https", cannot_be_a_base: false, username: "", password: None, host: Some(Domain("www.bing.com")), port: None, path: "/", query: None, fragment: None }, source: hyper::Error(Connect, ConnectError("dns error", Custom { kind: Uncategorized, error: "failed to lookup address information: Temporary failure in name resolution" })) })', src/lib.rs:5:47
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x55f8bfcc71ea - std::backtrace_rs::backtrace::libunwind::trace::h2f05d0192276a8f6
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
[INFO] [stdout]    1:     0x55f8bfcc71ea - std::backtrace_rs::backtrace::trace_unsynchronized::hedc23dff7a1af150
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x55f8bfcc71ea - std::sys_common::backtrace::_print_fmt::h17541ef7592f3ce2
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/sys_common/backtrace.rs:65:5
[INFO] [stdout]    3:     0x55f8bfcc71ea - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h20f75df5ab0c0792
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x55f8bfcea9df - core::fmt::write::h78109e6f466b3af6
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/core/src/fmt/mod.rs:1254:17
[INFO] [stdout]    5:     0x55f8bfcc4325 - std::io::Write::write_fmt::hc59e1b02dd273c8a
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/io/mod.rs:1698:15
[INFO] [stdout]    6:     0x55f8bfcc6fb5 - std::sys_common::backtrace::_print::h8dac57a9f8fbf9a5
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    7:     0x55f8bfcc6fb5 - std::sys_common::backtrace::print::hf9ecbf41d1aa712f
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    8:     0x55f8bfcc865e - std::panicking::default_hook::{{closure}}::h04c07acfc84ca028
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panicking.rs:269:22
[INFO] [stdout]    9:     0x55f8bfcc8405 - std::panicking::default_hook::h01f6bb23e1eceb2c
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panicking.rs:288:9
[INFO] [stdout]   10:     0x55f8bfcc8bbe - std::panicking::rust_panic_with_hook::h2bb3722bbaf2f6df
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panicking.rs:691:13
[INFO] [stdout]   11:     0x55f8bfcc8ab9 - std::panicking::begin_panic_handler::{{closure}}::h91bc7f36a4be011b
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panicking.rs:582:13
[INFO] [stdout]   12:     0x55f8bfcc7656 - std::sys_common::backtrace::__rust_end_short_backtrace::h8b3d3717114f9e59
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/sys_common/backtrace.rs:150:18
[INFO] [stdout]   13:     0x55f8bfcc8812 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panicking.rs:578:5
[INFO] [stdout]   14:     0x55f8bf6d1ec3 - core::panicking::panic_fmt::hfd368e3fbdabea26
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/core/src/panicking.rs:67:14
[INFO] [stdout]   15:     0x55f8bf6d2463 - core::result::unwrap_failed::he54eb4b2f125b26f
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/core/src/result.rs:1687:5
[INFO] [stdout]   16:     0x55f8bf6d5d63 - core::result::Result<T,E>::unwrap::h42ac781a617d126e
[INFO] [stdout]   17:     0x55f8bf6dd0fe - rust_out::main::{{closure}}::h6ddc92f78d5cbf9c
[INFO] [stdout]   18:     0x55f8bf6d948a - tokio::runtime::basic_scheduler::BasicScheduler<P>::block_on::{{closure}}::{{closure}}::h0910d235f6029daf
[INFO] [stdout]   19:     0x55f8bf6d79d8 - tokio::coop::with_budget::{{closure}}::hdca5dac36739b518
[INFO] [stdout]   20:     0x55f8bf6d3abe - std::thread::local::LocalKey<T>::try_with::h8bd6e0f0ff7fe623
[INFO] [stdout]   21:     0x55f8bf6d3586 - std::thread::local::LocalKey<T>::with::hd01e960dc07f2728
[INFO] [stdout]   22:     0x55f8bf6d8f8a - tokio::runtime::basic_scheduler::BasicScheduler<P>::block_on::{{closure}}::h6b21d7f7e742128b
[INFO] [stdout]   23:     0x55f8bf6d994f - tokio::runtime::basic_scheduler::enter::{{closure}}::h1cb9ce854702bcb0
[INFO] [stdout]   24:     0x55f8bf6d8be1 - tokio::macros::scoped_tls::ScopedKey<T>::set::h95b8c3da35f17e3c
[INFO] [stdout]   25:     0x55f8bf6d989d - tokio::runtime::basic_scheduler::enter::hcd58946a7b1dd373
[INFO] [stdout]   26:     0x55f8bf6d8cc8 - tokio::runtime::basic_scheduler::BasicScheduler<P>::block_on::h6bd4e5b02d568cfc
[INFO] [stdout]   27:     0x55f8bf6d9ed8 - tokio::runtime::Runtime::block_on::{{closure}}::h8f613449b21bd421
[INFO] [stdout]   28:     0x55f8bf6d9f7b - tokio::runtime::context::enter::h76313e755c381932
[INFO] [stdout]   29:     0x55f8bf6d9db4 - tokio::runtime::handle::Handle::enter::h4519e1efe20eb6a9
[INFO] [stdout]   30:     0x55f8bf6d9e2e - tokio::runtime::Runtime::block_on::hc25200ffa09754a8
[INFO] [stdout]   31:     0x55f8bf6dce60 - rust_out::main::h2731449a68dfa004
[INFO] [stdout]   32:     0x55f8bf6d4153 - core::ops::function::FnOnce::call_once::hd1715aa1b26fc35c
[INFO] [stdout]   33:     0x55f8bf6d3436 - std::sys_common::backtrace::__rust_begin_short_backtrace::h8d2b4d09ce515535
[INFO] [stdout]   34:     0x55f8bf6d3489 - std::rt::lang_start::{{closure}}::hc9a918c63b0dc835
[INFO] [stdout]   35:     0x55f8bfcc0d0e - core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once::h2eb19b8ce4148df4
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/core/src/ops/function.rs:287:13
[INFO] [stdout]   36:     0x55f8bfcc0d0e - std::panicking::try::do_call::h2e900feff5d504c5
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panicking.rs:485:40
[INFO] [stdout]   37:     0x55f8bfcc0d0e - std::panicking::try::h8854836cb85aa9f2
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panicking.rs:449:19
[INFO] [stdout]   38:     0x55f8bfcc0d0e - std::panic::catch_unwind::h706025dd4c48f64b
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panic.rs:140:14
[INFO] [stdout]   39:     0x55f8bfcc0d0e - std::rt::lang_start_internal::{{closure}}::h7be5b97f4a07a91a
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/rt.rs:148:48
[INFO] [stdout]   40:     0x55f8bfcc0d0e - std::panicking::try::do_call::h59847e9d0a176965
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panicking.rs:485:40
[INFO] [stdout]   41:     0x55f8bfcc0d0e - std::panicking::try::h399a918ba8522823
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panicking.rs:449:19
[INFO] [stdout]   42:     0x55f8bfcc0d0e - std::panic::catch_unwind::hca7ca6c55b2a2e26
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/panic.rs:140:14
[INFO] [stdout]   43:     0x55f8bfcc0d0e - std::rt::lang_start_internal::h2c807a81560459eb
[INFO] [stdout]                                at /rustc/1b7dd2252b99671ce5d1cb9664c5f8636329436d/library/std/src/rt.rs:148:20
[INFO] [stdout]   44:     0x55f8bf6d3467 - std::rt::lang_start::hc4bd3329ce767e23
[INFO] [stdout]   45:     0x55f8bf6dd1e5 - main
[INFO] [stdout]   46:     0x7fc1d567ad90 - <unknown>
[INFO] [stdout]   47:     0x7fc1d567ae40 - __libc_start_main
[INFO] [stdout]   48:     0x55f8bf6d2645 - _start
[INFO] [stdout]   49:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - get_url (line 6)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 3.72s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "293843503d09df3c7de876c50a810711b607ed5d7a0ce1225063353f51002f3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "293843503d09df3c7de876c50a810711b607ed5d7a0ce1225063353f51002f3b", kill_on_drop: false }`
[INFO] [stdout] 293843503d09df3c7de876c50a810711b607ed5d7a0ce1225063353f51002f3b
