[INFO] crate mutf8 0.2.0 is already in cache
[INFO] extracting crate mutf8 0.2.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/mutf8/0.2.0
[INFO] extracting crate mutf8 0.2.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/mutf8/0.2.0
[INFO] validating manifest of mutf8-0.2.0 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mutf8-0.2.0 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "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/beta-1.38-1/sources/1.37.0/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/beta-1.38-1/sources/beta-2019-08-13/reg/mutf8/0.2.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing mutf8-0.2.0 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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=warn" "-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 3cdc3c772ad5252b5e1f5cf6fca321e2efa2991fa4a49bdf1da03fd2882a4220
[INFO] running `"docker" "start" "-a" "3cdc3c772ad5252b5e1f5cf6fca321e2efa2991fa4a49bdf1da03fd2882a4220"`
[INFO] [stderr]    Compiling 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: 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]     Finished dev [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `"docker" "inspect" "3cdc3c772ad5252b5e1f5cf6fca321e2efa2991fa4a49bdf1da03fd2882a4220"`
[INFO] running `"docker" "rm" "-f" "3cdc3c772ad5252b5e1f5cf6fca321e2efa2991fa4a49bdf1da03fd2882a4220"`
[INFO] [stdout] 3cdc3c772ad5252b5e1f5cf6fca321e2efa2991fa4a49bdf1da03fd2882a4220
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 0fd225adf688202c68fdd13cad3ffc34442c993583ac18ceb4490cb31c943872
[INFO] running `"docker" "start" "-a" "0fd225adf688202c68fdd13cad3ffc34442c993583ac18ceb4490cb31c943872"`
[INFO] [stderr]    Compiling 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: 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] 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]     Finished dev [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `"docker" "inspect" "0fd225adf688202c68fdd13cad3ffc34442c993583ac18ceb4490cb31c943872"`
[INFO] running `"docker" "rm" "-f" "0fd225adf688202c68fdd13cad3ffc34442c993583ac18ceb4490cb31c943872"`
[INFO] [stdout] 0fd225adf688202c68fdd13cad3ffc34442c993583ac18ceb4490cb31c943872
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] d407ea09be17a0f82bf95724041faa87ba2dc8889bec9b5376164e4a0f0df865
[INFO] running `"docker" "start" "-a" "d407ea09be17a0f82bf95724041faa87ba2dc8889bec9b5376164e4a0f0df865"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/mutf8-ed0fa07e915452a2
[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
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/to_mutf8-53953052b9c2c46d
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test ascii_test ... ok
[INFO] [stdout] test nul_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests mutf8
[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
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "d407ea09be17a0f82bf95724041faa87ba2dc8889bec9b5376164e4a0f0df865"`
[INFO] running `"docker" "rm" "-f" "d407ea09be17a0f82bf95724041faa87ba2dc8889bec9b5376164e4a0f0df865"`
[INFO] [stdout] d407ea09be17a0f82bf95724041faa87ba2dc8889bec9b5376164e4a0f0df865