[INFO] fetching crate btrfsutil-fake 0.2.0-8324fe2...
[INFO] testing btrfsutil-fake-0.2.0-8324fe2 against 1.76.0 for beta-1.77-1
[INFO] extracting crate btrfsutil-fake 0.2.0-8324fe2 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate btrfsutil-fake 0.2.0-8324fe2 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate btrfsutil-fake 0.2.0-8324fe2
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate btrfsutil-fake 0.2.0-8324fe2
[INFO] tweaked toml for crates.io crate btrfsutil-fake 0.2.0-8324fe2 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate crates.io crate btrfsutil-fake 0.2.0-8324fe2 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" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded thiserror v1.0.49
[INFO] [stderr]   Downloaded tempfile v3.8.0
[INFO] [stderr]   Downloaded btrfsutil-sys v1.3.0
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[INFO] [stderr]   Downloaded bindgen v0.66.1
[INFO] [stderr]   Downloaded nix v0.14.1
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[INFO] [stderr]   Downloaded serde_derive v1.0.188
[INFO] [stderr]   Downloaded thiserror-impl v1.0.49
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8d4b1e17f499cc7418dfcd8a6dc37304373b5a89b57ff45db53d3dd2d6d7787f
[INFO] running `Command { std: "docker" "start" "-a" "8d4b1e17f499cc7418dfcd8a6dc37304373b5a89b57ff45db53d3dd2d6d7787f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8d4b1e17f499cc7418dfcd8a6dc37304373b5a89b57ff45db53d3dd2d6d7787f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d4b1e17f499cc7418dfcd8a6dc37304373b5a89b57ff45db53d3dd2d6d7787f", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e5cc726d251f74cc8a3176e144b92bc68bafd89ff7f9c41c7626be6c7301da7c
[INFO] running `Command { std: "docker" "start" "-a" "e5cc726d251f74cc8a3176e144b92bc68bafd89ff7f9c41c7626be6c7301da7c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.67
[INFO] [stderr]    Compiling prettyplease v0.2.15
[INFO] [stderr]    Compiling libc v0.2.148
[INFO] [stderr]    Compiling rustix v0.38.15
[INFO] [stderr]    Compiling bitflags v2.4.0
[INFO] [stderr]    Compiling clang-sys v1.6.1
[INFO] [stderr]    Compiling linux-raw-sys v0.4.8
[INFO] [stderr]    Compiling regex-syntax v0.7.5
[INFO] [stderr]    Compiling memchr v2.6.4
[INFO] [stderr]    Compiling serde v1.0.188
[INFO] [stderr]    Compiling libloading v0.7.4
[INFO] [stderr]    Compiling home v0.5.5
[INFO] [stderr]    Compiling bindgen v0.66.1
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling either v1.9.0
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling shlex v1.2.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling syn v2.0.37
[INFO] [stderr]    Compiling num-traits v0.2.16
[INFO] [stderr]    Compiling thiserror v1.0.49
[INFO] [stderr]    Compiling iana-time-zone v0.1.57
[INFO] [stderr]    Compiling regex-automata v0.3.9
[INFO] [stderr]    Compiling which v4.4.2
[INFO] [stderr]    Compiling cexpr v0.6.0
[INFO] [stderr]    Compiling uuid v0.8.2
[INFO] [stderr]    Compiling chrono v0.4.31
[INFO] [stderr]    Compiling regex v1.9.6
[INFO] [stderr]    Compiling serde_derive v1.0.188
[INFO] [stderr]    Compiling thiserror-impl v1.0.49
[INFO] [stderr]    Compiling toml v0.5.11
[INFO] [stderr]    Compiling btrfsutil-sys v1.3.0
[INFO] [stderr]    Compiling btrfsutil-fake v0.2.0-8324fe2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.49s
[INFO] running `Command { std: "docker" "inspect" "e5cc726d251f74cc8a3176e144b92bc68bafd89ff7f9c41c7626be6c7301da7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5cc726d251f74cc8a3176e144b92bc68bafd89ff7f9c41c7626be6c7301da7c", kill_on_drop: false }`
[INFO] [stdout] e5cc726d251f74cc8a3176e144b92bc68bafd89ff7f9c41c7626be6c7301da7c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5ca705ce1d3afcbcbb2d638a67e1bb26dc9df812040db565ebcb1e71bb6e8751
[INFO] running `Command { std: "docker" "start" "-a" "5ca705ce1d3afcbcbb2d638a67e1bb26dc9df812040db565ebcb1e71bb6e8751", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.6.4
[INFO] [stderr]    Compiling log v0.4.20
[INFO] [stderr]    Compiling libc v0.2.148
[INFO] [stderr]    Compiling libloading v0.7.4
[INFO] [stderr]    Compiling bitflags v2.4.0
[INFO] [stderr]    Compiling linux-raw-sys v0.4.8
[INFO] [stderr]    Compiling nom v5.1.3
[INFO] [stderr]    Compiling unicode-width v0.1.11
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling bindgen v0.58.1
[INFO] [stderr]    Compiling aho-corasick v1.1.1
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling rustix v0.38.15
[INFO] [stderr]    Compiling clang-sys v1.6.1
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling termcolor v1.3.0
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling which v3.1.1
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling regex-automata v0.3.9
[INFO] [stderr]    Compiling cexpr v0.6.0
[INFO] [stderr]    Compiling which v4.4.2
[INFO] [stderr]    Compiling cexpr v0.4.0
[INFO] [stderr]    Compiling nix v0.18.0
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling errno v0.2.8
[INFO] [stderr]    Compiling fastrand v2.0.1
[INFO] [stderr]    Compiling regex v1.9.6
[INFO] [stderr]    Compiling bindgen v0.66.1
[INFO] [stderr]    Compiling env_logger v0.8.4
[INFO] [stderr]    Compiling tempfile v3.8.0
[INFO] [stderr]    Compiling libmount v0.1.15
[INFO] [stderr]    Compiling loopdev v0.2.2
[INFO] [stderr]    Compiling btrfsutil-sys v1.3.0
[INFO] [stderr]    Compiling btrfsutil-fake v0.2.0-8324fe2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable `pub` item
[INFO] [stdout]   --> src/testing/mod.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub use self::loopbacked::test_with_spec;
[INFO] [stdout]    | ---     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    | |
[INFO] [stdout]    | help: consider restricting its visibility: `pub(crate)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: or consider exporting it for use by other crates
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:3:23
[INFO] [stdout]    |
[INFO] [stdout] 3  | #![deny(missing_docs, unreachable_pub)]
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable `pub` item
[INFO] [stdout]   --> src/testing/mod.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub use self::test_lib::btrfs_create_fs;
[INFO] [stdout]    | ---     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    | |
[INFO] [stdout]    | help: consider restricting its visibility: `pub(crate)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: or consider exporting it for use by other crates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable `pub` item
[INFO] [stdout]   --> src/testing/loopbacked.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct LoopTestDev {
[INFO] [stdout]    | ---^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    | |
[INFO] [stdout]    | help: consider restricting its visibility: `pub(crate)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: or consider exporting it for use by other crates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable `pub` item
[INFO] [stdout]   --> src/testing/loopbacked.rs:79:1
[INFO] [stdout]    |
[INFO] [stdout] 79 |   pub fn test_with_spec<F>(count: u8, test: F)
[INFO] [stdout]    |   ^--
[INFO] [stdout]    |   |
[INFO] [stdout]    |  _help: consider restricting its visibility: `pub(crate)`
[INFO] [stdout]    | |
[INFO] [stdout] 80 | | where
[INFO] [stdout] 81 | |     F: Fn(&[&Path]) + panic::RefUnwindSafe,
[INFO] [stdout]    | |___________________________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: or consider exporting it for use by other crates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable `pub` item
[INFO] [stdout]   --> src/testing/test_lib.rs:40:1
[INFO] [stdout]    |
[INFO] [stdout] 40 | pub fn btrfs_create_fs(devnode: &Path) -> io::Result<()> {
[INFO] [stdout]    | ---^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    | |
[INFO] [stdout]    | help: consider restricting its visibility: `pub(crate)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: or consider exporting it for use by other crates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable `pub` item
[INFO] [stdout]   --> src/testing/test_lib.rs:66:1
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub fn clean_up() -> io::Result<()> {
[INFO] [stdout]    | ---^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    | |
[INFO] [stdout]    | help: consider restricting its visibility: `pub(crate)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: or consider exporting it for use by other crates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 14.28s
[INFO] running `Command { std: "docker" "inspect" "5ca705ce1d3afcbcbb2d638a67e1bb26dc9df812040db565ebcb1e71bb6e8751", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ca705ce1d3afcbcbb2d638a67e1bb26dc9df812040db565ebcb1e71bb6e8751", kill_on_drop: false }`
[INFO] [stdout] 5ca705ce1d3afcbcbb2d638a67e1bb26dc9df812040db565ebcb1e71bb6e8751
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 37f7e4aefc5e132274f7a4314275ee005c068c6e2c9f1a7d4d8737a1397e7b66
[INFO] running `Command { std: "docker" "start" "-a" "37f7e4aefc5e132274f7a4314275ee005c068c6e2c9f1a7d4d8737a1397e7b66", kill_on_drop: false }`
[INFO] [stderr] warning: unreachable `pub` item
[INFO] [stderr]   --> src/testing/mod.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub use self::loopbacked::test_with_spec;
[INFO] [stderr]    | ---     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    | |
[INFO] [stderr]    | help: consider restricting its visibility: `pub(crate)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: or consider exporting it for use by other crates
[INFO] [stderr] note: the lint level is defined here
[INFO] [stderr]   --> src/lib.rs:3:23
[INFO] [stderr]    |
[INFO] [stderr] 3  | #![deny(missing_docs, unreachable_pub)]
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable `pub` item
[INFO] [stderr]   --> src/testing/mod.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 | pub use self::test_lib::btrfs_create_fs;
[INFO] [stderr]    | ---     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    | |
[INFO] [stderr]    | help: consider restricting its visibility: `pub(crate)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: or consider exporting it for use by other crates
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable `pub` item
[INFO] [stderr]   --> src/testing/loopbacked.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub struct LoopTestDev {
[INFO] [stderr]    | ---^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    | |
[INFO] [stderr]    | help: consider restricting its visibility: `pub(crate)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: or consider exporting it for use by other crates
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable `pub` item
[INFO] [stderr]   --> src/testing/loopbacked.rs:79:1
[INFO] [stderr]    |
[INFO] [stderr] 79 |   pub fn test_with_spec<F>(count: u8, test: F)
[INFO] [stderr]    |   ^--
[INFO] [stderr]    |   |
[INFO] [stderr]    |  _help: consider restricting its visibility: `pub(crate)`
[INFO] [stderr]    | |
[INFO] [stderr] 80 | | where
[INFO] [stderr] 81 | |     F: Fn(&[&Path]) + panic::RefUnwindSafe,
[INFO] [stderr]    | |___________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: or consider exporting it for use by other crates
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable `pub` item
[INFO] [stderr]   --> src/testing/test_lib.rs:40:1
[INFO] [stderr]    |
[INFO] [stderr] 40 | pub fn btrfs_create_fs(devnode: &Path) -> io::Result<()> {
[INFO] [stderr]    | ---^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    | |
[INFO] [stderr]    | help: consider restricting its visibility: `pub(crate)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: or consider exporting it for use by other crates
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable `pub` item
[INFO] [stderr]   --> src/testing/test_lib.rs:66:1
[INFO] [stderr]    |
[INFO] [stderr] 66 | pub fn clean_up() -> io::Result<()> {
[INFO] [stderr]    | ---^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    | |
[INFO] [stderr]    | help: consider restricting its visibility: `pub(crate)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: or consider exporting it for use by other crates
[INFO] [stderr] 
[INFO] [stderr] warning: `btrfsutil-fake` (lib test) generated 6 warnings (run `cargo fix --lib -p btrfsutil-fake --tests` to apply 6 suggestions)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/btrfsutil-2400ff2dfa031c39)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test subvolume::subvol::test::loop_test_btrfs_subvol ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- subvolume::subvol::test::loop_test_btrfs_subvol stdout ----
[INFO] [stdout] thread 'subvolume::subvol::test::loop_test_btrfs_subvol' panicked at src/testing/loopbacked.rs:54:34:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: Os { code: 2, kind: NotFound, message: "No such file or directory" }
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x55e3f9830df6 - std::backtrace_rs::backtrace::libunwind::trace::hbee8a7973eeb6c93
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
[INFO] [stdout]    1:     0x55e3f9830df6 - std::backtrace_rs::backtrace::trace_unsynchronized::hc8ac75eea3aa6899
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x55e3f9830df6 - std::sys_common::backtrace::_print_fmt::hc7f3e3b5298b1083
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stdout]    3:     0x55e3f9830df6 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hbb235daedd7c6190
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x55e3f985ba20 - core::fmt::rt::Argument::fmt::h76c38a80d925a410
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/fmt/rt.rs:142:9
[INFO] [stdout]    5:     0x55e3f985ba20 - core::fmt::write::h3ed6aeaa977c8e45
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/fmt/mod.rs:1120:17
[INFO] [stdout]    6:     0x55e3f982e5df - std::io::Write::write_fmt::h1299aa7741865f2b
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/io/mod.rs:1810:15
[INFO] [stdout]    7:     0x55e3f9830bd4 - std::sys_common::backtrace::_print::h5d645a07e0fcfdbb
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x55e3f9830bd4 - std::sys_common::backtrace::print::h85035a511aafe7a8
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x55e3f98329c7 - std::panicking::default_hook::{{closure}}::hcce8cea212785a25
[INFO] [stdout]   10:     0x55e3f98326ad - std::panicking::default_hook::hf5fcb0f213fe709a
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:289:9
[INFO] [stdout]   11:     0x55e3f97b8697 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h60265c2dfa87ee34
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/alloc/src/boxed.rs:2029:9
[INFO] [stdout]   12:     0x55e3f97b8697 - test::test_main::{{closure}}::h77865bd3127078c6
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/test/src/lib.rs:138:21
[INFO] [stdout]   13:     0x55e3f9832fe6 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hbc5ccf4eb663e1e5
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/alloc/src/boxed.rs:2029:9
[INFO] [stdout]   14:     0x55e3f9832fe6 - std::panicking::rust_panic_with_hook::h095fccf1dc9379ee
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:783:13
[INFO] [stdout]   15:     0x55e3f9832d32 - std::panicking::begin_panic_handler::{{closure}}::h032ba12139b353db
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:657:13
[INFO] [stdout]   16:     0x55e3f98312f6 - std::sys_common::backtrace::__rust_end_short_backtrace::h9259bc2ff8fd0f76
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stdout]   17:     0x55e3f9832a90 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:645:5
[INFO] [stdout]   18:     0x55e3f975f105 - core::panicking::panic_fmt::h784f20a50eaab275
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/panicking.rs:72:14
[INFO] [stdout]   19:     0x55e3f975f6a3 - core::result::unwrap_failed::h03d8a5018196e1cd
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/result.rs:1649:5
[INFO] [stdout]   20:     0x55e3f9767edb - core::result::Result<T,E>::unwrap::h9c30e7429204b190
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/result.rs:1073:23
[INFO] [stdout]   21:     0x55e3f9764495 - btrfsutil::testing::loopbacked::get_devices::hda5fddeb745cd1cf
[INFO] [stdout]                                at /opt/rustwide/workdir/src/testing/loopbacked.rs:54:14
[INFO] [stdout]   22:     0x55e3f97649fa - btrfsutil::testing::loopbacked::test_with_spec::h9cbf74d0e6a977f0
[INFO] [stdout]                                at /opt/rustwide/workdir/src/testing/loopbacked.rs:89:42
[INFO] [stdout]   23:     0x55e3f977237b - btrfsutil::subvolume::subvol::test::loop_test_btrfs_subvol::h54a168d92500a7ea
[INFO] [stdout]                                at /opt/rustwide/workdir/src/subvolume/subvol.rs:518:9
[INFO] [stdout]   24:     0x55e3f9772357 - btrfsutil::subvolume::subvol::test::loop_test_btrfs_subvol::{{closure}}::h0faa4badfb1cfb78
[INFO] [stdout]                                at /opt/rustwide/workdir/src/subvolume/subvol.rs:517:32
[INFO] [stdout]   25:     0x55e3f9766256 - core::ops::function::FnOnce::call_once::h513733b949aa8096
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   26:     0x55e3f97bdf6f - core::ops::function::FnOnce::call_once::h8dc6907944022cf6
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   27:     0x55e3f97bdf6f - test::__rust_begin_short_backtrace::haae1a87433f1efb3
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/test/src/lib.rs:627:18
[INFO] [stdout]   28:     0x55e3f97bccf1 - test::run_test_in_process::{{closure}}::h8c7decfa7c14e152
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/test/src/lib.rs:650:60
[INFO] [stdout]   29:     0x55e3f97bccf1 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h19e6ff056d9d21e9
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   30:     0x55e3f97bccf1 - std::panicking::try::do_call::h89c848fcaa37c035
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:552:40
[INFO] [stdout]   31:     0x55e3f97bccf1 - std::panicking::try::h57ab3dc74e2839b8
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:516:19
[INFO] [stdout]   32:     0x55e3f97bccf1 - std::panic::catch_unwind::hfb6a1b1abc120fb9
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panic.rs:142:14
[INFO] [stdout]   33:     0x55e3f97bccf1 - test::run_test_in_process::h5ae2f9875edd562d
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/test/src/lib.rs:650:27
[INFO] [stdout]   34:     0x55e3f97bccf1 - test::run_test::{{closure}}::h35d7300d8928a067
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/test/src/lib.rs:573:43
[INFO] [stdout]   35:     0x55e3f9784026 - test::run_test::{{closure}}::h7525ced405d23d1b
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/test/src/lib.rs:601:41
[INFO] [stdout]   36:     0x55e3f9784026 - std::sys_common::backtrace::__rust_begin_short_backtrace::h4e7db78ce05afad8
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys_common/backtrace.rs:155:18
[INFO] [stdout]   37:     0x55e3f9789087 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hcfbcb64f1a1b3482
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/thread/mod.rs:529:17
[INFO] [stdout]   38:     0x55e3f9789087 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h9d89c5c4108bd689
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   39:     0x55e3f9789087 - std::panicking::try::do_call::h8a4869bc94ec50c9
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:552:40
[INFO] [stdout]   40:     0x55e3f9789087 - std::panicking::try::h9a576f20ff81ac30
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panicking.rs:516:19
[INFO] [stdout]   41:     0x55e3f9789087 - std::panic::catch_unwind::hbcb4e3f860ef9830
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/panic.rs:142:14
[INFO] [stdout]   42:     0x55e3f9789087 - std::thread::Builder::spawn_unchecked_::{{closure}}::h93c79a6be1505948
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/thread/mod.rs:528:30
[INFO] [stdout]   43:     0x55e3f9789087 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h426d96740c81bdaf
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   44:     0x55e3f9838f95 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h12de4fc57affb195
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/alloc/src/boxed.rs:2015:9
[INFO] [stdout]   45:     0x55e3f9838f95 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h3c619f45059d5cf1
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/alloc/src/boxed.rs:2015:9
[INFO] [stdout]   46:     0x55e3f9838f95 - std::sys::unix::thread::Thread::new::thread_start::hbac657605e4b7389
[INFO] [stdout]                                at /rustc/07dca489ac2d933c78d3c5158e3f43beefeb02ce/library/std/src/sys/unix/thread.rs:108:17
[INFO] [stdout]   47:     0x7f6a39410ac3 - <unknown>
[INFO] [stdout]   48:     0x7f6a394a1bf4 - __clone
[INFO] [stdout]   49:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     subvolume::subvol::test::loop_test_btrfs_subvol
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[INFO] running `Command { std: "docker" "inspect" "37f7e4aefc5e132274f7a4314275ee005c068c6e2c9f1a7d4d8737a1397e7b66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37f7e4aefc5e132274f7a4314275ee005c068c6e2c9f1a7d4d8737a1397e7b66", kill_on_drop: false }`
[INFO] [stdout] 37f7e4aefc5e132274f7a4314275ee005c068c6e2c9f1a7d4d8737a1397e7b66
