[INFO] updating cached repository stallmanifold/ring-buffer
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/stallmanifold/ring-buffer
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/stallmanifold/ring-buffer" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/stallmanifold/ring-buffer"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/stallmanifold/ring-buffer'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/stallmanifold/ring-buffer" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/stallmanifold/ring-buffer"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/stallmanifold/ring-buffer'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] db8deca640e585b05bca9d397897a8ec0844c737
[INFO] sha for GitHub repo stallmanifold/ring-buffer: db8deca640e585b05bca9d397897a8ec0844c737
[INFO] validating manifest of stallmanifold/ring-buffer on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of stallmanifold/ring-buffer on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing stallmanifold/ring-buffer
[INFO] finished frobbing stallmanifold/ring-buffer
[INFO] frobbed toml for stallmanifold/ring-buffer written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/stallmanifold/ring-buffer/Cargo.toml
[INFO] started frobbing stallmanifold/ring-buffer
[INFO] finished frobbing stallmanifold/ring-buffer
[INFO] frobbed toml for stallmanifold/ring-buffer written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/stallmanifold/ring-buffer/Cargo.toml
[INFO] crate stallmanifold/ring-buffer already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking stallmanifold/ring-buffer against master#60960a260f7b5c695fd0717311d72ce62dd4eb43 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-4/master#60960a260f7b5c695fd0717311d72ce62dd4eb43:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/stallmanifold/ring-buffer:/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" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] a34f997706c7bdd0059adbd57daa54d2258781e1bbb26486ac31587764b3e10c
[INFO] running `"docker" "start" "-a" "a34f997706c7bdd0059adbd57daa54d2258781e1bbb26486ac31587764b3e10c"`
[INFO] [stderr]     Checking ring-buffer v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `ring_buffer::RingBuffer`
[INFO] [stderr]  --> src/tests.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use ring_buffer::RingBuffer;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Read`, `Write`
[INFO] [stderr]  --> src/tests.rs:2:15
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::{Read, Write};
[INFO] [stderr]   |               ^^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/ring_buffer.rs:24:13
[INFO] [stderr]    |
[INFO] [stderr] 24 |         for i in 0..buffer.capacity() {
[INFO] [stderr]    |             ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `but`
[INFO] [stderr]    --> src/ring_buffer.rs:132:24
[INFO] [stderr]     |
[INFO] [stderr] 132 |     fn read(&mut self, but: &mut [u8]) -> io::Result<usize> {
[INFO] [stderr]     |                        ^^^ help: consider prefixing with an underscore: `_but`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `buf`
[INFO] [stderr]    --> src/ring_buffer.rs:140:25
[INFO] [stderr]     |
[INFO] [stderr] 140 |     fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
[INFO] [stderr]     |                         ^^^ help: consider prefixing with an underscore: `_buf`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `buffer`
[INFO] [stderr]   --> src/ring_buffer.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     buffer: Box<Vec<u8>>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `capacity`
[INFO] [stderr]   --> src/ring_buffer.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     capacity: usize,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `start`
[INFO] [stderr]   --> src/ring_buffer.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     start:  usize,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `end`
[INFO] [stderr]   --> src/ring_buffer.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     end:    usize,    
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/ring_buffer.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn new(capacity: usize) -> RingBuffer {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `read_buf_amount`
[INFO] [stderr]   --> src/ring_buffer.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     fn read_buf_amount(&mut self, target: &mut [u8], amount: usize) -> Result<usize, RingBufferError> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `write_buf_amount`
[INFO] [stderr]   --> src/ring_buffer.rs:57:5
[INFO] [stderr]    |
[INFO] [stderr] 57 |     fn write_buf_amount(&mut self, data: &[u8], amount: usize) -> Result<usize, RingBufferError> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_empty`
[INFO] [stderr]   --> src/ring_buffer.rs:80:5
[INFO] [stderr]    |
[INFO] [stderr] 80 |     fn is_empty(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_full`
[INFO] [stderr]   --> src/ring_buffer.rs:85:5
[INFO] [stderr]    |
[INFO] [stderr] 85 |     fn is_full(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `available_data`
[INFO] [stderr]   --> src/ring_buffer.rs:90:5
[INFO] [stderr]    |
[INFO] [stderr] 90 |     fn available_data(&self) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `available_space`
[INFO] [stderr]   --> src/ring_buffer.rs:95:5
[INFO] [stderr]    |
[INFO] [stderr] 95 |     fn available_space(&self) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `gets`
[INFO] [stderr]   --> src/ring_buffer.rs:99:5
[INFO] [stderr]    |
[INFO] [stderr] 99 |     fn gets(&mut self, amount: usize) -> Result<Box<[u8]>, RingBufferError> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `puts`
[INFO] [stderr]    --> src/ring_buffer.rs:116:5
[INFO] [stderr]     |
[INFO] [stderr] 116 |     fn puts(&mut self, data: &[u8]) -> Result<usize, RingBufferError> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `commit_read`
[INFO] [stderr]    --> src/ring_buffer.rs:121:5
[INFO] [stderr]     |
[INFO] [stderr] 121 |     fn commit_read(&mut self, amount: usize) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `commit_write`
[INFO] [stderr]    --> src/ring_buffer.rs:126:5
[INFO] [stderr]     |
[INFO] [stderr] 126 |     fn commit_write(&mut self, amount: usize) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]    --> src/ring_buffer.rs:111:17
[INFO] [stderr]     |
[INFO] [stderr] 111 |         assert!(self.available_data() >= 0, "Error in read commit.");
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/ring_buffer.rs:24:13
[INFO] [stderr]    |
[INFO] [stderr] 24 |         for i in 0..buffer.capacity() {
[INFO] [stderr]    |             ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `but`
[INFO] [stderr]    --> src/ring_buffer.rs:132:24
[INFO] [stderr]     |
[INFO] [stderr] 132 |     fn read(&mut self, but: &mut [u8]) -> io::Result<usize> {
[INFO] [stderr]     |                        ^^^ help: consider prefixing with an underscore: `_but`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `buf`
[INFO] [stderr]    --> src/ring_buffer.rs:140:25
[INFO] [stderr]     |
[INFO] [stderr] 140 |     fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
[INFO] [stderr]     |                         ^^^ help: consider prefixing with an underscore: `_buf`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `buffer`
[INFO] [stderr]   --> src/ring_buffer.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     buffer: Box<Vec<u8>>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `capacity`
[INFO] [stderr]   --> src/ring_buffer.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     capacity: usize,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `start`
[INFO] [stderr]   --> src/ring_buffer.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     start:  usize,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `end`
[INFO] [stderr]   --> src/ring_buffer.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     end:    usize,    
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/ring_buffer.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn new(capacity: usize) -> RingBuffer {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `read_buf_amount`
[INFO] [stderr]   --> src/ring_buffer.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     fn read_buf_amount(&mut self, target: &mut [u8], amount: usize) -> Result<usize, RingBufferError> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `write_buf_amount`
[INFO] [stderr]   --> src/ring_buffer.rs:57:5
[INFO] [stderr]    |
[INFO] [stderr] 57 |     fn write_buf_amount(&mut self, data: &[u8], amount: usize) -> Result<usize, RingBufferError> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_empty`
[INFO] [stderr]   --> src/ring_buffer.rs:80:5
[INFO] [stderr]    |
[INFO] [stderr] 80 |     fn is_empty(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_full`
[INFO] [stderr]   --> src/ring_buffer.rs:85:5
[INFO] [stderr]    |
[INFO] [stderr] 85 |     fn is_full(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `available_data`
[INFO] [stderr]   --> src/ring_buffer.rs:90:5
[INFO] [stderr]    |
[INFO] [stderr] 90 |     fn available_data(&self) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `available_space`
[INFO] [stderr]   --> src/ring_buffer.rs:95:5
[INFO] [stderr]    |
[INFO] [stderr] 95 |     fn available_space(&self) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `gets`
[INFO] [stderr]   --> src/ring_buffer.rs:99:5
[INFO] [stderr]    |
[INFO] [stderr] 99 |     fn gets(&mut self, amount: usize) -> Result<Box<[u8]>, RingBufferError> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `puts`
[INFO] [stderr]    --> src/ring_buffer.rs:116:5
[INFO] [stderr]     |
[INFO] [stderr] 116 |     fn puts(&mut self, data: &[u8]) -> Result<usize, RingBufferError> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `commit_read`
[INFO] [stderr]    --> src/ring_buffer.rs:121:5
[INFO] [stderr]     |
[INFO] [stderr] 121 |     fn commit_read(&mut self, amount: usize) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `commit_write`
[INFO] [stderr]    --> src/ring_buffer.rs:126:5
[INFO] [stderr]     |
[INFO] [stderr] 126 |     fn commit_write(&mut self, amount: usize) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]    --> src/ring_buffer.rs:111:17
[INFO] [stderr]     |
[INFO] [stderr] 111 |         assert!(self.available_data() >= 0, "Error in read commit.");
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.81s
[INFO] running `"docker" "inspect" "a34f997706c7bdd0059adbd57daa54d2258781e1bbb26486ac31587764b3e10c"`
[INFO] running `"docker" "rm" "-f" "a34f997706c7bdd0059adbd57daa54d2258781e1bbb26486ac31587764b3e10c"`
[INFO] [stdout] a34f997706c7bdd0059adbd57daa54d2258781e1bbb26486ac31587764b3e10c