[INFO] cloning repository https://github.com/fasterthanlime/read-raw-ext4
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fasterthanlime/read-raw-ext4" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffasterthanlime%2Fread-raw-ext4", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffasterthanlime%2Fread-raw-ext4'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] eff405ce8905e93171b9cf524e2f6a9830b80a33
[INFO] testing fasterthanlime/read-raw-ext4 against 1.99.0-beta.8 for beta-1.100-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffasterthanlime%2Fread-raw-ext4" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/fasterthanlime/read-raw-ext4
[INFO] finished tweaking git repo https://github.com/fasterthanlime/read-raw-ext4
[INFO] tweaked toml for git repo https://github.com/fasterthanlime/read-raw-ext4 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/fasterthanlime/read-raw-ext4 on toolchain 1.99.0-beta.8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/fasterthanlime/read-raw-ext4 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" "+1.99.0-beta.8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded hex-slice v0.1.4
[INFO] [stderr]   Downloaded custom_debug_derive v0.5.0
[INFO] [stderr]   Downloaded tracing-error v0.2.0
[INFO] [stderr]   Downloaded custom_debug v0.5.0
[INFO] [stderr]   Downloaded indenter v0.3.3
[INFO] [stderr]   Downloaded winnow v0.3.5
[INFO] [stderr]   Downloaded rustc-demangle v0.1.21
[INFO] [stderr]   Downloaded proc-macro2 v1.0.51
[INFO] [stderr]   Downloaded eyre v0.6.8
[INFO] [stderr]   Downloaded toml_edit v0.19.5
[INFO] [stderr]   Downloaded color-spantrace v0.2.0
[INFO] [stderr]   Downloaded positioned-io v0.3.1
[INFO] [stderr]   Downloaded color-eyre v0.6.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3111399a4047eeb3a02b7a90e478d715f38a8c6669b5c4b49d30a17385265909" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] a5dff46349db1084aba8141afde3a954e785839bbbb43bd7f0e51e4cf3633ae2
[INFO] running `Command { std: "docker" "start" "a5dff46349db1084aba8141afde3a954e785839bbbb43bd7f0e51e4cf3633ae2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a5dff46349db1084aba8141afde3a954e785839bbbb43bd7f0e51e4cf3633ae2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "a5dff46349db1084aba8141afde3a954e785839bbbb43bd7f0e51e4cf3633ae2" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a5dff46349db1084aba8141afde3a954e785839bbbb43bd7f0e51e4cf3633ae2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "a5dff46349db1084aba8141afde3a954e785839bbbb43bd7f0e51e4cf3633ae2" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling once_cell v1.17.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.51
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling toml_datetime v0.6.1
[INFO] [stderr]    Compiling winnow v0.3.5
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]    Compiling eyre v0.6.8
[INFO] [stderr]    Compiling indexmap v1.9.2
[INFO] [stderr]    Compiling unicode-xid v0.2.4
[INFO] [stderr]    Compiling gimli v0.27.2
[INFO] [stderr]    Compiling miniz_oxide v0.6.2
[INFO] [stderr]    Compiling owo-colors v3.5.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.21
[INFO] [stderr]    Compiling indenter v0.3.3
[INFO] [stderr]    Compiling hex-slice v0.1.4
[INFO] [stderr]    Compiling tracing-core v0.1.30
[INFO] [stderr]    Compiling thread_local v1.1.7
[INFO] [stderr]    Compiling object v0.30.3
[INFO] [stderr]    Compiling tracing v0.1.37
[INFO] [stderr]    Compiling tracing-subscriber v0.3.16
[INFO] [stderr]    Compiling backtrace v0.3.67
[INFO] [stderr]    Compiling positioned-io v0.3.1
[INFO] [stderr]    Compiling tracing-error v0.2.0
[INFO] [stderr]    Compiling color-spantrace v0.2.0
[INFO] [stderr]    Compiling addr2line v0.19.0
[INFO] [stderr]    Compiling toml_edit v0.19.5
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]    Compiling custom_debug_derive v0.5.0
[INFO] [stderr]    Compiling custom_debug v0.5.0
[INFO] [stderr]    Compiling color-eyre v0.6.2
[INFO] [stderr]    Compiling proc-macro-crate v1.3.1
[INFO] [stderr]    Compiling num_enum_derive v0.5.11
[INFO] [stderr]    Compiling num_enum v0.5.11
[INFO] [stderr]    Compiling read-raw-ext4 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: non-local `impl` definition, `impl` blocks should be written at the same level as their item
[INFO] [stdout]   --> src/main.rs:9:10
[INFO] [stdout]    |
[INFO] [stdout]  9 | #[derive(CustomDebug)]
[INFO] [stdout]    |          ^----------
[INFO] [stdout]    |          |
[INFO] [stdout]    |          `Debug` is not local
[INFO] [stdout]    |          move the `impl` block outside of this constant `_DERIVE_core_fmt_Debug_FOR_DirectoryEntry`
[INFO] [stdout] 10 | struct DirectoryEntry {
[INFO] [stdout]    |        -------------- `DirectoryEntry` is not local
[INFO] [stdout]    |
[INFO] [stdout]    = note: the derive macro `CustomDebug` defines the non-local `impl`, and may need to be changed
[INFO] [stdout]    = note: the derive macro `CustomDebug` may come from an old version of the `custom_debug_derive` crate, try updating your dependency with `cargo update -p custom_debug_derive`
[INFO] [stdout]    = note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl`
[INFO] [stdout]    = note: items in an anonymous const item (`const _: () = { ... }`) are treated as in the same scope as the anonymous const's declaration for the purpose of this lint
[INFO] [stdout]    = note: `#[warn(non_local_definitions)]` on by default
[INFO] [stdout]    = note: this warning originates in the derive macro `CustomDebug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: non-local `impl` definition, `impl` blocks should be written at the same level as their item
[INFO] [stdout]   --> src/main.rs:79:10
[INFO] [stdout]    |
[INFO] [stdout] 79 | #[derive(CustomDebug)]
[INFO] [stdout]    |          ^----------
[INFO] [stdout]    |          |
[INFO] [stdout]    |          `Debug` is not local
[INFO] [stdout]    |          move the `impl` block outside of this constant `_DERIVE_core_fmt_Debug_FOR_Inode`
[INFO] [stdout] 80 | struct Inode {
[INFO] [stdout]    |        ----- `Inode` is not local
[INFO] [stdout]    |
[INFO] [stdout]    = note: the derive macro `CustomDebug` defines the non-local `impl`, and may need to be changed
[INFO] [stdout]    = note: the derive macro `CustomDebug` may come from an old version of the `custom_debug_derive` crate, try updating your dependency with `cargo update -p custom_debug_derive`
[INFO] [stdout]    = note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl`
[INFO] [stdout]    = note: items in an anonymous const item (`const _: () = { ... }`) are treated as in the same scope as the anonymous const's declaration for the purpose of this lint
[INFO] [stdout]    = note: this warning originates in the derive macro `CustomDebug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: non-local `impl` definition, `impl` blocks should be written at the same level as their item
[INFO] [stdout]    --> src/main.rs:224:10
[INFO] [stdout]     |
[INFO] [stdout] 224 | #[derive(CustomDebug)]
[INFO] [stdout]     |          ^----------
[INFO] [stdout]     |          |
[INFO] [stdout]     |          `Debug` is not local
[INFO] [stdout]     |          move the `impl` block outside of this constant `_DERIVE_core_fmt_Debug_FOR_Superblock`
[INFO] [stdout] 225 | struct Superblock {
[INFO] [stdout]     |        ---------- `Superblock` is not local
[INFO] [stdout]     |
[INFO] [stdout]     = note: the derive macro `CustomDebug` defines the non-local `impl`, and may need to be changed
[INFO] [stdout]     = note: the derive macro `CustomDebug` may come from an old version of the `custom_debug_derive` crate, try updating your dependency with `cargo update -p custom_debug_derive`
[INFO] [stdout]     = note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl`
[INFO] [stdout]     = note: items in an anonymous const item (`const _: () = { ... }`) are treated as in the same scope as the anonymous const's declaration for the purpose of this lint
[INFO] [stdout]     = note: this warning originates in the derive macro `CustomDebug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 15.24s
[INFO] running `Command { std: "docker" "inspect" "a5dff46349db1084aba8141afde3a954e785839bbbb43bd7f0e51e4cf3633ae2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "a5dff46349db1084aba8141afde3a954e785839bbbb43bd7f0e51e4cf3633ae2" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling read-raw-ext4 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: non-local `impl` definition, `impl` blocks should be written at the same level as their item
[INFO] [stdout]   --> src/main.rs:9:10
[INFO] [stdout]    |
[INFO] [stdout]  9 | #[derive(CustomDebug)]
[INFO] [stdout]    |          ^----------
[INFO] [stdout]    |          |
[INFO] [stdout]    |          `Debug` is not local
[INFO] [stdout]    |          move the `impl` block outside of this constant `_DERIVE_core_fmt_Debug_FOR_DirectoryEntry`
[INFO] [stdout] 10 | struct DirectoryEntry {
[INFO] [stdout]    |        -------------- `DirectoryEntry` is not local
[INFO] [stdout]    |
[INFO] [stdout]    = note: the derive macro `CustomDebug` defines the non-local `impl`, and may need to be changed
[INFO] [stdout]    = note: the derive macro `CustomDebug` may come from an old version of the `custom_debug_derive` crate, try updating your dependency with `cargo update -p custom_debug_derive`
[INFO] [stdout]    = note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl`
[INFO] [stdout]    = note: items in an anonymous const item (`const _: () = { ... }`) are treated as in the same scope as the anonymous const's declaration for the purpose of this lint
[INFO] [stdout]    = note: `#[warn(non_local_definitions)]` on by default
[INFO] [stdout]    = note: this warning originates in the derive macro `CustomDebug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: non-local `impl` definition, `impl` blocks should be written at the same level as their item
[INFO] [stdout]   --> src/main.rs:79:10
[INFO] [stdout]    |
[INFO] [stdout] 79 | #[derive(CustomDebug)]
[INFO] [stdout]    |          ^----------
[INFO] [stdout]    |          |
[INFO] [stdout]    |          `Debug` is not local
[INFO] [stdout]    |          move the `impl` block outside of this constant `_DERIVE_core_fmt_Debug_FOR_Inode`
[INFO] [stdout] 80 | struct Inode {
[INFO] [stdout]    |        ----- `Inode` is not local
[INFO] [stdout]    |
[INFO] [stdout]    = note: the derive macro `CustomDebug` defines the non-local `impl`, and may need to be changed
[INFO] [stdout]    = note: the derive macro `CustomDebug` may come from an old version of the `custom_debug_derive` crate, try updating your dependency with `cargo update -p custom_debug_derive`
[INFO] [stdout]    = note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl`
[INFO] [stdout]    = note: items in an anonymous const item (`const _: () = { ... }`) are treated as in the same scope as the anonymous const's declaration for the purpose of this lint
[INFO] [stdout]    = note: this warning originates in the derive macro `CustomDebug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: non-local `impl` definition, `impl` blocks should be written at the same level as their item
[INFO] [stdout]    --> src/main.rs:224:10
[INFO] [stdout]     |
[INFO] [stdout] 224 | #[derive(CustomDebug)]
[INFO] [stdout]     |          ^----------
[INFO] [stdout]     |          |
[INFO] [stdout]     |          `Debug` is not local
[INFO] [stdout]     |          move the `impl` block outside of this constant `_DERIVE_core_fmt_Debug_FOR_Superblock`
[INFO] [stdout] 225 | struct Superblock {
[INFO] [stdout]     |        ---------- `Superblock` is not local
[INFO] [stdout]     |
[INFO] [stdout]     = note: the derive macro `CustomDebug` defines the non-local `impl`, and may need to be changed
[INFO] [stdout]     = note: the derive macro `CustomDebug` may come from an old version of the `custom_debug_derive` crate, try updating your dependency with `cargo update -p custom_debug_derive`
[INFO] [stdout]     = note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl`
[INFO] [stdout]     = note: items in an anonymous const item (`const _: () = { ... }`) are treated as in the same scope as the anonymous const's declaration for the purpose of this lint
[INFO] [stdout]     = note: this warning originates in the derive macro `CustomDebug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.36s
[INFO] running `Command { std: "docker" "inspect" "a5dff46349db1084aba8141afde3a954e785839bbbb43bd7f0e51e4cf3633ae2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "a5dff46349db1084aba8141afde3a954e785839bbbb43bd7f0e51e4cf3633ae2" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] warning: non-local `impl` definition, `impl` blocks should be written at the same level as their item
[INFO] [stderr]   --> src/main.rs:9:10
[INFO] [stderr]    |
[INFO] [stderr]  9 | #[derive(CustomDebug)]
[INFO] [stderr]    |          ^----------
[INFO] [stderr]    |          |
[INFO] [stderr]    |          `Debug` is not local
[INFO] [stderr]    |          move the `impl` block outside of this constant `_DERIVE_core_fmt_Debug_FOR_DirectoryEntry`
[INFO] [stderr] 10 | struct DirectoryEntry {
[INFO] [stderr]    |        -------------- `DirectoryEntry` is not local
[INFO] [stderr]    |
[INFO] [stderr]    = note: the derive macro `CustomDebug` defines the non-local `impl`, and may need to be changed
[INFO] [stderr]    = note: the derive macro `CustomDebug` may come from an old version of the `custom_debug_derive` crate, try updating your dependency with `cargo update -p custom_debug_derive`
[INFO] [stderr]    = note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl`
[INFO] [stderr]    = note: items in an anonymous const item (`const _: () = { ... }`) are treated as in the same scope as the anonymous const's declaration for the purpose of this lint
[INFO] [stderr]    = note: `#[warn(non_local_definitions)]` on by default
[INFO] [stderr]    = note: this warning originates in the derive macro `CustomDebug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: non-local `impl` definition, `impl` blocks should be written at the same level as their item
[INFO] [stderr]   --> src/main.rs:79:10
[INFO] [stderr]    |
[INFO] [stderr] 79 | #[derive(CustomDebug)]
[INFO] [stderr]    |          ^----------
[INFO] [stderr]    |          |
[INFO] [stderr]    |          `Debug` is not local
[INFO] [stderr]    |          move the `impl` block outside of this constant `_DERIVE_core_fmt_Debug_FOR_Inode`
[INFO] [stderr] 80 | struct Inode {
[INFO] [stderr]    |        ----- `Inode` is not local
[INFO] [stderr]    |
[INFO] [stderr]    = note: the derive macro `CustomDebug` defines the non-local `impl`, and may need to be changed
[INFO] [stderr]    = note: the derive macro `CustomDebug` may come from an old version of the `custom_debug_derive` crate, try updating your dependency with `cargo update -p custom_debug_derive`
[INFO] [stderr]    = note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl`
[INFO] [stderr]    = note: items in an anonymous const item (`const _: () = { ... }`) are treated as in the same scope as the anonymous const's declaration for the purpose of this lint
[INFO] [stderr]    = note: this warning originates in the derive macro `CustomDebug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: non-local `impl` definition, `impl` blocks should be written at the same level as their item
[INFO] [stderr]    --> src/main.rs:224:10
[INFO] [stderr]     |
[INFO] [stderr] 224 | #[derive(CustomDebug)]
[INFO] [stderr]     |          ^----------
[INFO] [stderr]     |          |
[INFO] [stderr]     |          `Debug` is not local
[INFO] [stderr]     |          move the `impl` block outside of this constant `_DERIVE_core_fmt_Debug_FOR_Superblock`
[INFO] [stderr] 225 | struct Superblock {
[INFO] [stderr]     |        ---------- `Superblock` is not local
[INFO] [stderr]     |
[INFO] [stderr]     = note: the derive macro `CustomDebug` defines the non-local `impl`, and may need to be changed
[INFO] [stderr]     = note: the derive macro `CustomDebug` may come from an old version of the `custom_debug_derive` crate, try updating your dependency with `cargo update -p custom_debug_derive`
[INFO] [stderr]     = note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl`
[INFO] [stderr]     = note: items in an anonymous const item (`const _: () = { ... }`) are treated as in the same scope as the anonymous const's declaration for the purpose of this lint
[INFO] [stderr]     = note: this warning originates in the derive macro `CustomDebug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `read-raw-ext4` (bin "read-raw-ext4" test) generated 3 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/read_raw_ext4-a0af5e9bb7f8191a)
[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] running `Command { std: "docker" "inspect" "a5dff46349db1084aba8141afde3a954e785839bbbb43bd7f0e51e4cf3633ae2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5dff46349db1084aba8141afde3a954e785839bbbb43bd7f0e51e4cf3633ae2", kill_on_drop: false }`
[INFO] [stdout] a5dff46349db1084aba8141afde3a954e785839bbbb43bd7f0e51e4cf3633ae2
