[INFO] crate rust_multicodec 0.2.0 is already in cache
[INFO] extracting crate rust_multicodec 0.2.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/rust_multicodec/0.2.0
[INFO] extracting crate rust_multicodec 0.2.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rust_multicodec/0.2.0
[INFO] validating manifest of rust_multicodec-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 rust_multicodec-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 rust_multicodec-0.2.0
[INFO] finished frobbing rust_multicodec-0.2.0
[INFO] frobbed toml for rust_multicodec-0.2.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/rust_multicodec/0.2.0/Cargo.toml
[INFO] started frobbing rust_multicodec-0.2.0
[INFO] finished frobbing rust_multicodec-0.2.0
[INFO] frobbed toml for rust_multicodec-0.2.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rust_multicodec/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 rust_multicodec-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/rust_multicodec/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] a263978888e753016de92047df657c946fe2cdf557c6b07654554cfc029334aa
[INFO] running `"docker" "start" "-a" "a263978888e753016de92047df657c946fe2cdf557c6b07654554cfc029334aa"`
[INFO] [stderr]    Compiling integer-encoding v1.0.7
[INFO] [stderr]    Compiling hex-slice v0.1.4
[INFO] [stderr]    Compiling rust_multicodec v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/lib.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::str`
[INFO] [stderr]   --> src/lib.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | use std::str;
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.12s
[INFO] running `"docker" "inspect" "a263978888e753016de92047df657c946fe2cdf557c6b07654554cfc029334aa"`
[INFO] running `"docker" "rm" "-f" "a263978888e753016de92047df657c946fe2cdf557c6b07654554cfc029334aa"`
[INFO] [stdout] a263978888e753016de92047df657c946fe2cdf557c6b07654554cfc029334aa
[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/rust_multicodec/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] 0c79ba97a29b803138eca6b6e4cb2c39f6ef7d9c1674374f25137084b30ea4ba
[INFO] running `"docker" "start" "-a" "0c79ba97a29b803138eca6b6e4cb2c39f6ef7d9c1674374f25137084b30ea4ba"`
[INFO] [stderr]    Compiling rust_multicodec v0.2.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.30s
[INFO] running `"docker" "inspect" "0c79ba97a29b803138eca6b6e4cb2c39f6ef7d9c1674374f25137084b30ea4ba"`
[INFO] running `"docker" "rm" "-f" "0c79ba97a29b803138eca6b6e4cb2c39f6ef7d9c1674374f25137084b30ea4ba"`
[INFO] [stdout] 0c79ba97a29b803138eca6b6e4cb2c39f6ef7d9c1674374f25137084b30ea4ba
[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/rust_multicodec/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] ca8ee3b77f42a15c98c4e871bba813edefa67081a21fdda2a388f89ef3cef7e5
[INFO] running `"docker" "start" "-a" "ca8ee3b77f42a15c98c4e871bba813edefa67081a21fdda2a388f89ef3cef7e5"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_multicodec-cf7d1835b59f67a4
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test codec_prefix::tests::prefix_works ... ok
[INFO] [stdout] test tests::encoding_decoding_works ... 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 rust_multicodec
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test src/codec_prefix.rs - codec_prefix::get (line 46) ... ok
[INFO] [stdout] test src/codec_prefix.rs - codec_prefix::remove (line 77) ... ok
[INFO] [stdout] test src/codec_prefix.rs - codec_prefix::add (line 14) ... ok
[INFO] [stdout] test src/lib.rs - encode (line 34) ... ok
[INFO] [stdout] test src/lib.rs - decode (line 73) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "ca8ee3b77f42a15c98c4e871bba813edefa67081a21fdda2a388f89ef3cef7e5"`
[INFO] running `"docker" "rm" "-f" "ca8ee3b77f42a15c98c4e871bba813edefa67081a21fdda2a388f89ef3cef7e5"`
[INFO] [stdout] ca8ee3b77f42a15c98c4e871bba813edefa67081a21fdda2a388f89ef3cef7e5