[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 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 3e0806290383886a54d65829833efc2fd3f6883069b04d89d3c4d1c1fdacf6de
[INFO] running `"docker" "start" "-a" "3e0806290383886a54d65829833efc2fd3f6883069b04d89d3c4d1c1fdacf6de"`
[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 0.42s
[INFO] running `"docker" "inspect" "3e0806290383886a54d65829833efc2fd3f6883069b04d89d3c4d1c1fdacf6de"`
[INFO] running `"docker" "rm" "-f" "3e0806290383886a54d65829833efc2fd3f6883069b04d89d3c4d1c1fdacf6de"`
[INFO] [stdout] 3e0806290383886a54d65829833efc2fd3f6883069b04d89d3c4d1c1fdacf6de
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] e5bac32a68f8bd414f6923ff9580fe9eed5987a9564faef1608e924c8c89feab
[INFO] running `"docker" "start" "-a" "e5bac32a68f8bd414f6923ff9580fe9eed5987a9564faef1608e924c8c89feab"`
[INFO] [stderr]    Compiling mutf8 v0.2.0 (/opt/crater/workdir)
[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: 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 0.56s
[INFO] running `"docker" "inspect" "e5bac32a68f8bd414f6923ff9580fe9eed5987a9564faef1608e924c8c89feab"`
[INFO] running `"docker" "rm" "-f" "e5bac32a68f8bd414f6923ff9580fe9eed5987a9564faef1608e924c8c89feab"`
[INFO] [stdout] e5bac32a68f8bd414f6923ff9580fe9eed5987a9564faef1608e924c8c89feab
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 13f6105a75d4fbd04cb28290a0fe35112b367c8482affbef19af0dcbd372b82b
[INFO] running `"docker" "start" "-a" "13f6105a75d4fbd04cb28290a0fe35112b367c8482affbef19af0dcbd372b82b"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/mutf8-c781288c9575c282
[INFO] [stderr]      Running /opt/crater/target/debug/deps/to_mutf8-51526fdd98ea37d6
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests mutf8
[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] [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] [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" "13f6105a75d4fbd04cb28290a0fe35112b367c8482affbef19af0dcbd372b82b"`
[INFO] running `"docker" "rm" "-f" "13f6105a75d4fbd04cb28290a0fe35112b367c8482affbef19af0dcbd372b82b"`
[INFO] [stdout] 13f6105a75d4fbd04cb28290a0fe35112b367c8482affbef19af0dcbd372b82b