[INFO] updating cached repository LogoiLab/fuc
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/LogoiLab/fuc
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/LogoiLab/fuc" "work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/LogoiLab/fuc"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/LogoiLab/fuc'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/LogoiLab/fuc" "work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/LogoiLab/fuc"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/LogoiLab/fuc'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7f48c0e81ccb0e62d1c77709e56b567c150fffec
[INFO] sha for GitHub repo LogoiLab/fuc: 7f48c0e81ccb0e62d1c77709e56b567c150fffec
[INFO] validating manifest of LogoiLab/fuc on toolchain master#452087b4bf18cece2d52d7cd8c9147195e5404bf
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of LogoiLab/fuc on toolchain try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing LogoiLab/fuc
[INFO] finished frobbing LogoiLab/fuc
[INFO] frobbed toml for LogoiLab/fuc written to work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/LogoiLab/fuc/Cargo.toml
[INFO] started frobbing LogoiLab/fuc
[INFO] finished frobbing LogoiLab/fuc
[INFO] frobbed toml for LogoiLab/fuc written to work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/LogoiLab/fuc/Cargo.toml
[INFO] crate LogoiLab/fuc already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking LogoiLab/fuc against master#452087b4bf18cece2d52d7cd8c9147195e5404bf for pr-63247
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63247/worker-4/master#452087b4bf18cece2d52d7cd8c9147195e5404bf:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/LogoiLab/fuc:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 97b0ca9ed0f1f176ac9efa8e0b90d1cfe50a1403def774983ad13ae25402026e
[INFO] running `"docker" "start" "-a" "97b0ca9ed0f1f176ac9efa8e0b90d1cfe50a1403def774983ad13ae25402026e"`
[INFO] [stderr]    Compiling serde v1.0.87
[INFO] [stderr]    Compiling rustc-demangle v0.1.13
[INFO] [stderr]    Compiling pulldown-cmark v0.2.0
[INFO] [stderr]    Compiling itoa v0.4.3
[INFO] [stderr]    Compiling same-file v1.0.4
[INFO] [stderr]    Compiling bytecount v0.4.0
[INFO] [stderr]    Compiling lz4-sys v1.8.3
[INFO] [stderr]    Compiling libc v0.2.48
[INFO] [stderr]    Compiling ryu v0.2.7
[INFO] [stderr]    Compiling walkdir v2.2.7
[INFO] [stderr]    Compiling syn v0.15.26
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling backtrace v0.3.13
[INFO] [stderr]    Compiling error-chain v0.12.0
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling serde_derive v1.0.87
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling serde_json v1.0.38
[INFO] [stderr]    Compiling cargo_metadata v0.6.4
[INFO] [stderr]    Compiling skeptic v0.13.4
[INFO] [stderr]    Compiling lz4 v1.23.1
[INFO] [stderr]     Checking fuc v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `fuc::block::Block`
[INFO] [stderr]  --> src/main.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use fuc::block::Block;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `fuc::block::Block`
[INFO] [stderr]  --> src/main.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use fuc::block::Block;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]   --> src/fuc/block.rs:49:9
[INFO] [stderr]    |
[INFO] [stderr] 49 |         self.dirty = false;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]   --> src/fuc/descriptor.rs:61:9
[INFO] [stderr]    |
[INFO] [stderr] 61 |         self.dirty = false;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]   --> src/fuc/block.rs:49:9
[INFO] [stderr]    |
[INFO] [stderr] 49 |         self.dirty = false;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]   --> src/fuc/fat.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |         self.dirty = false;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]   --> src/fuc/file.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |         self.dirty = false;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]   --> src/fuc/volume.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |         self.dirty = false;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `writer`
[INFO] [stderr]   --> src/fuc/block.rs:47:29
[INFO] [stderr]    |
[INFO] [stderr] 47 |     pub fn write(&mut self, writer: Writer) -> Writer {
[INFO] [stderr]    |                             ^^^^^^ help: consider prefixing with an underscore: `_writer`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `writer`
[INFO] [stderr]   --> src/fuc/descriptor.rs:59:29
[INFO] [stderr]    |
[INFO] [stderr] 59 |     pub fn write(&mut self, writer: Writer) -> Writer {
[INFO] [stderr]    |                             ^^^^^^ help: consider prefixing with an underscore: `_writer`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `writer`
[INFO] [stderr]   --> src/fuc/fat.rs:26:29
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn write(&mut self, writer: Writer) -> Writer {
[INFO] [stderr]    |                             ^^^^^^ help: consider prefixing with an underscore: `_writer`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `writer`
[INFO] [stderr]   --> src/fuc/file.rs:12:29
[INFO] [stderr]    |
[INFO] [stderr] 12 |     pub fn write(&mut self, writer: Writer) -> Writer {
[INFO] [stderr]    |                             ^^^^^^ help: consider prefixing with an underscore: `_writer`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `writer`
[INFO] [stderr]   --> src/fuc/volume.rs:17:29
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub fn write(&mut self, writer: Writer) -> Writer {
[INFO] [stderr]    |                             ^^^^^^ help: consider prefixing with an underscore: `_writer`
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]   --> src/fuc/descriptor.rs:61:9
[INFO] [stderr]    |
[INFO] [stderr] 61 |         self.dirty = false;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `offset`
[INFO] [stderr]   --> src/fuc/block.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     offset: usize,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `fdesc`
[INFO] [stderr]  --> src/fuc/fat.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     fdesc: Vec<FileDescriptor>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `desc`
[INFO] [stderr]  --> src/fuc/file.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     desc: FileDescriptor,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `blocks`
[INFO] [stderr]  --> src/fuc/file.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     blocks: Vec<Block>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `magic`
[INFO] [stderr]   --> src/fuc/volume.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     magic: [u8; MAGIC_LENGTH],
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `fat`
[INFO] [stderr]   --> src/fuc/volume.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     fat: FileAllocationTable,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `files`
[INFO] [stderr]   --> src/fuc/volume.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     files: Vec<File>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]   --> src/fuc/fat.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |         self.dirty = false;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]   --> src/fuc/file.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |         self.dirty = false;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]   --> src/fuc/volume.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |         self.dirty = false;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `writer`
[INFO] [stderr]   --> src/fuc/block.rs:47:29
[INFO] [stderr]    |
[INFO] [stderr] 47 |     pub fn write(&mut self, writer: Writer) -> Writer {
[INFO] [stderr]    |                             ^^^^^^ help: consider prefixing with an underscore: `_writer`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `writer`
[INFO] [stderr]   --> src/fuc/descriptor.rs:59:29
[INFO] [stderr]    |
[INFO] [stderr] 59 |     pub fn write(&mut self, writer: Writer) -> Writer {
[INFO] [stderr]    |                             ^^^^^^ help: consider prefixing with an underscore: `_writer`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `writer`
[INFO] [stderr]   --> src/fuc/fat.rs:26:29
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn write(&mut self, writer: Writer) -> Writer {
[INFO] [stderr]    |                             ^^^^^^ help: consider prefixing with an underscore: `_writer`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `writer`
[INFO] [stderr]   --> src/fuc/file.rs:12:29
[INFO] [stderr]    |
[INFO] [stderr] 12 |     pub fn write(&mut self, writer: Writer) -> Writer {
[INFO] [stderr]    |                             ^^^^^^ help: consider prefixing with an underscore: `_writer`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `writer`
[INFO] [stderr]   --> src/fuc/volume.rs:17:29
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub fn write(&mut self, writer: Writer) -> Writer {
[INFO] [stderr]    |                             ^^^^^^ help: consider prefixing with an underscore: `_writer`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `offset`
[INFO] [stderr]   --> src/fuc/block.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     offset: usize,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `fdesc`
[INFO] [stderr]  --> src/fuc/fat.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     fdesc: Vec<FileDescriptor>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `desc`
[INFO] [stderr]  --> src/fuc/file.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     desc: FileDescriptor,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `blocks`
[INFO] [stderr]  --> src/fuc/file.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     blocks: Vec<Block>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `magic`
[INFO] [stderr]   --> src/fuc/volume.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     magic: [u8; MAGIC_LENGTH],
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `fat`
[INFO] [stderr]   --> src/fuc/volume.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     fat: FileAllocationTable,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `files`
[INFO] [stderr]   --> src/fuc/volume.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     files: Vec<File>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 57.45s
[INFO] running `"docker" "inspect" "97b0ca9ed0f1f176ac9efa8e0b90d1cfe50a1403def774983ad13ae25402026e"`
[INFO] running `"docker" "rm" "-f" "97b0ca9ed0f1f176ac9efa8e0b90d1cfe50a1403def774983ad13ae25402026e"`
[INFO] [stdout] 97b0ca9ed0f1f176ac9efa8e0b90d1cfe50a1403def774983ad13ae25402026e