[INFO] crate mutf8 0.2.0 is already in cache
[INFO] extracting crate mutf8 0.2.0 into work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/mutf8/0.2.0
[INFO] extracting crate mutf8 0.2.0 into work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/mutf8/0.2.0
[INFO] validating manifest of mutf8-0.2.0 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 mutf8-0.2.0 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 mutf8-0.2.0
[INFO] finished frobbing mutf8-0.2.0
[INFO] frobbed toml for mutf8-0.2.0 written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/mutf8/0.2.0/Cargo.toml
[INFO] started frobbing mutf8-0.2.0
[INFO] finished frobbing mutf8-0.2.0
[INFO] frobbed toml for mutf8-0.2.0 written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/mutf8/0.2.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 mutf8-0.2.0 against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-0/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/mutf8/0.2.0:/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" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] ca78f85ae0c98446274e59715792f54d31f85d62ec956eaad8f21221e0739316
[INFO] running `"docker" "start" "-a" "ca78f85ae0c98446274e59715792f54d31f85d62ec956eaad8f21221e0739316"`
[INFO] [stderr]     Checking mutf8 v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]    --> src/lib.rs:414:12
[INFO] [stderr]     |
[INFO] [stderr] 414 |             bits += ((byte4 as u32) & 0x3F);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]    --> src/lib.rs:414:12
[INFO] [stderr]     |
[INFO] [stderr] 414 |             bits += ((byte4 as u32) & 0x3F);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `data`
[INFO] [stderr]   --> src/lib.rs:29:18
[INFO] [stderr]    |
[INFO] [stderr] 29 |             Cow::Borrowed(data) => {
[INFO] [stderr]    |                           ^^^^ help: consider prefixing with an underscore: `_data`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `data`
[INFO] [stderr]   --> src/lib.rs:74:18
[INFO] [stderr]    |
[INFO] [stderr] 74 |             Cow::Borrowed(data) => {
[INFO] [stderr]    |                           ^^^^ help: consider prefixing with an underscore: `_data`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `data`
[INFO] [stderr]   --> src/lib.rs:86:18
[INFO] [stderr]    |
[INFO] [stderr] 86 |             Cow::Borrowed(data) => {
[INFO] [stderr]    |                           ^^^^ help: consider prefixing with an underscore: `_data`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `data`
[INFO] [stderr]   --> src/lib.rs:29:18
[INFO] [stderr]    |
[INFO] [stderr] 29 |             Cow::Borrowed(data) => {
[INFO] [stderr]    |                           ^^^^ help: consider prefixing with an underscore: `_data`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `data`
[INFO] [stderr]   --> src/lib.rs:74:18
[INFO] [stderr]    |
[INFO] [stderr] 74 |             Cow::Borrowed(data) => {
[INFO] [stderr]    |                           ^^^^ help: consider prefixing with an underscore: `_data`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `data`
[INFO] [stderr]   --> src/lib.rs:86:18
[INFO] [stderr]    |
[INFO] [stderr] 86 |             Cow::Borrowed(data) => {
[INFO] [stderr]    |                           ^^^^ help: consider prefixing with an underscore: `_data`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `MString`
[INFO] [stderr]  --> tests/to_mutf8.rs:3:13
[INFO] [stderr]   |
[INFO] [stderr] 3 | use mutf8::{MString, mstr};
[INFO] [stderr]   |             ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.47s
[INFO] running `"docker" "inspect" "ca78f85ae0c98446274e59715792f54d31f85d62ec956eaad8f21221e0739316"`
[INFO] running `"docker" "rm" "-f" "ca78f85ae0c98446274e59715792f54d31f85d62ec956eaad8f21221e0739316"`
[INFO] [stdout] ca78f85ae0c98446274e59715792f54d31f85d62ec956eaad8f21221e0739316