[INFO] fetching crate waveform 0.3.2...
[INFO] checking waveform-0.3.2 against beta-2021-10-15 for beta-1.56-3
[INFO] extracting crate waveform 0.3.2 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate waveform 0.3.2 on toolchain beta-2021-10-15
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate waveform 0.3.2
[INFO] finished tweaking crates.io crate waveform 0.3.2
[INFO] tweaked toml for crates.io crate waveform 0.3.2 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rlibc v1.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 158ae689f9b1838a7d4f5eac5cdd01cc897ab695e8fcd63baaef0731e9c415fe
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "158ae689f9b1838a7d4f5eac5cdd01cc897ab695e8fcd63baaef0731e9c415fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "158ae689f9b1838a7d4f5eac5cdd01cc897ab695e8fcd63baaef0731e9c415fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "158ae689f9b1838a7d4f5eac5cdd01cc897ab695e8fcd63baaef0731e9c415fe", kill_on_drop: false }`
[INFO] [stdout] 158ae689f9b1838a7d4f5eac5cdd01cc897ab695e8fcd63baaef0731e9c415fe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-10-15" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ba4dbd8d07da5480ff5fe0c9028995146646dbf14df2cd5d14e53fdfcf02287e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ba4dbd8d07da5480ff5fe0c9028995146646dbf14df2cd5d14e53fdfcf02287e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking rlibc v1.0.0
[INFO] [stderr]     Checking waveform v0.3.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/misc.rs:66:102
[INFO] [stdout]    |
[INFO] [stdout] 66 |     pub fn new(amp_min: f64, amp_max: f64, foreground: Color, background: Color) -> Result<Self, Box<Error>> {
[INFO] [stdout]    |                                                                                                      ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/misc.rs:92:90
[INFO] [stdout]    |
[INFO] [stdout] 92 |     pub fn set_colors(&mut self, background: Color, foreground: Color) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                                                                          ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/binned.rs:36:127
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn new(samples: &SampleSequence<T>, bin_size: usize, config: WaveformConfig) -> Result<BinnedWaveformRenderer<T>, Box<Error>> {
[INFO] [stdout]    |                                                                                                                               ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/binned.rs:125:160
[INFO] [stdout]     |
[INFO] [stdout] 125 | ...8], full_shape: (usize, usize)) -> Result<(), Box<Error>> {
[INFO] [stdout]     |                                                      ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/multi.rs:30:110
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub fn new(samples: &SampleSequence<T>, bin_sizes: &[usize], config: WaveformConfig) -> Result<Self, Box<Error>> {
[INFO] [stdout]    |                                                                                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/multi.rs:46:30
[INFO] [stdout]    |
[INFO] [stdout] 46 |                 .insert(*bs, try!(BinnedWaveformRenderer::new(samples, *bs, config)));
[INFO] [stdout]    |                              ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/multi.rs:123:164
[INFO] [stdout]     |
[INFO] [stdout] 123 | ...8], full_shape: (usize, usize)) -> Result<(), Box<Error>> {
[INFO] [stdout]     |                                                      ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/misc.rs:66:102
[INFO] [stdout]    |
[INFO] [stdout] 66 |     pub fn new(amp_min: f64, amp_max: f64, foreground: Color, background: Color) -> Result<Self, Box<Error>> {
[INFO] [stdout]    |                                                                                                      ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/misc.rs:92:90
[INFO] [stdout]    |
[INFO] [stdout] 92 |     pub fn set_colors(&mut self, background: Color, foreground: Color) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                                                                          ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/binned.rs:36:127
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn new(samples: &SampleSequence<T>, bin_size: usize, config: WaveformConfig) -> Result<BinnedWaveformRenderer<T>, Box<Error>> {
[INFO] [stdout]    |                                                                                                                               ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/binned.rs:125:160
[INFO] [stdout]     |
[INFO] [stdout] 125 | ...8], full_shape: (usize, usize)) -> Result<(), Box<Error>> {
[INFO] [stdout]     |                                                      ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/binned.rs:412:22
[INFO] [stdout]     |
[INFO] [stdout] 412 |         let _test: &(Sync+Send) = &wfr;
[INFO] [stdout]     |                      ^^^^^^^^^ help: use `dyn`: `dyn Sync+Send`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/multi.rs:30:110
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub fn new(samples: &SampleSequence<T>, bin_sizes: &[usize], config: WaveformConfig) -> Result<Self, Box<Error>> {
[INFO] [stdout]    |                                                                                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/multi.rs:46:30
[INFO] [stdout]    |
[INFO] [stdout] 46 |                 .insert(*bs, try!(BinnedWaveformRenderer::new(samples, *bs, config)));
[INFO] [stdout]    |                              ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/multi.rs:123:164
[INFO] [stdout]     |
[INFO] [stdout] 123 | ...8], full_shape: (usize, usize)) -> Result<(), Box<Error>> {
[INFO] [stdout]     |                                                      ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/multi.rs:178:22
[INFO] [stdout]     |
[INFO] [stdout] 178 |         let _test: &(Sync+Send) = &wfr;
[INFO] [stdout]     |                      ^^^^^^^^^ help: use `dyn`: `dyn Sync+Send`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c1_is_scalar`
[INFO] [stdout]   --> src/misc.rs:32:17
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let mut c1_is_scalar = false;
[INFO] [stdout]    |                 ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_c1_is_scalar`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c2_is_scalar`
[INFO] [stdout]   --> src/misc.rs:33:17
[INFO] [stdout]    |
[INFO] [stdout] 33 |         let mut c2_is_scalar = false;
[INFO] [stdout]    |                 ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_c2_is_scalar`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/misc.rs:32:13
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let mut c1_is_scalar = false;
[INFO] [stdout]    |             ----^^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/misc.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 33 |         let mut c2_is_scalar = false;
[INFO] [stdout]    |             ----^^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c1_is_scalar`
[INFO] [stdout]   --> src/misc.rs:32:17
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let mut c1_is_scalar = false;
[INFO] [stdout]    |                 ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_c1_is_scalar`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c2_is_scalar`
[INFO] [stdout]   --> src/misc.rs:33:17
[INFO] [stdout]    |
[INFO] [stdout] 33 |         let mut c2_is_scalar = false;
[INFO] [stdout]    |                 ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_c2_is_scalar`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/misc.rs:32:13
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let mut c1_is_scalar = false;
[INFO] [stdout]    |             ----^^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/misc.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 33 |         let mut c2_is_scalar = false;
[INFO] [stdout]    |             ----^^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> benches/render.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vec`
[INFO] [stdout]   --> examples/binned.rs:86:9
[INFO] [stdout]    |
[INFO] [stdout] 86 |     let vec: Vec<u8> =
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_vec`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no variant named `RGBA` found for enum `waveform::Color`
[INFO] [stdout]   --> benches/render.rs:23:16
[INFO] [stdout]    |
[INFO] [stdout] 23 |         Color::RGBA {
[INFO] [stdout]    |                ^^^^ variant not found in `waveform::Color`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no variant named `RGBA` found for enum `waveform::Color`
[INFO] [stdout]   --> benches/render.rs:29:16
[INFO] [stdout]    |
[INFO] [stdout] 29 |         Color::RGBA {
[INFO] [stdout]    |                ^^^^ variant not found in `waveform::Color`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `waveform` due to 4 previous errors
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `vec`
[INFO] [stdout]   --> examples/multi.rs:85:13
[INFO] [stdout]    |
[INFO] [stdout] 85 |     let mut vec: Vec<u8> =
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_vec`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> examples/multi.rs:85:9
[INFO] [stdout]    |
[INFO] [stdout] 85 |     let mut vec: Vec<u8> =
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "ba4dbd8d07da5480ff5fe0c9028995146646dbf14df2cd5d14e53fdfcf02287e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba4dbd8d07da5480ff5fe0c9028995146646dbf14df2cd5d14e53fdfcf02287e", kill_on_drop: false }`
[INFO] [stdout] ba4dbd8d07da5480ff5fe0c9028995146646dbf14df2cd5d14e53fdfcf02287e
