[INFO] crate yew_audio 0.1.2 is already in cache
[INFO] extracting crate yew_audio 0.1.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/yew_audio/0.1.2
[INFO] extracting crate yew_audio 0.1.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/yew_audio/0.1.2
[INFO] validating manifest of yew_audio-0.1.2 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 yew_audio-0.1.2 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 yew_audio-0.1.2
[INFO] finished frobbing yew_audio-0.1.2
[INFO] frobbed toml for yew_audio-0.1.2 written to work/ex/beta-1.38-1/sources/1.37.0/reg/yew_audio/0.1.2/Cargo.toml
[INFO] started frobbing yew_audio-0.1.2
[INFO] finished frobbing yew_audio-0.1.2
[INFO] frobbed toml for yew_audio-0.1.2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/yew_audio/0.1.2/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing yew_audio-0.1.2 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/yew_audio/0.1.2:/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] 134cedbf0337246a7cce2ada0422ad82e5c6129f2f6f42ca6615f76146b843b7
[INFO] running `"docker" "start" "-a" "134cedbf0337246a7cce2ada0422ad82e5c6129f2f6f42ca6615f76146b843b7"`
[INFO] [stderr]    Compiling proc-macro2 v1.0.1
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.50
[INFO] [stderr]    Compiling syn v1.0.3
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling cfg-if v0.1.9
[INFO] [stderr]    Compiling cc v1.0.40
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling serde v1.0.99
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling ryu v1.0.0
[INFO] [stderr]    Compiling bumpalo v2.6.0
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling wasm-bindgen v0.2.50
[INFO] [stderr]    Compiling itoa v0.4.4
[INFO] [stderr]    Compiling stdweb-internal-runtime v0.1.4
[INFO] [stderr]    Compiling sha1 v0.6.0
[INFO] [stderr] error[E0463]: can't find crate for `std`
[INFO] [stderr]   |
[INFO] [stderr]   = note: the `wasm32-unknown-unknown` target may not be installed
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0463`.
[INFO] [stderr] error: Could not compile `itoa`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "134cedbf0337246a7cce2ada0422ad82e5c6129f2f6f42ca6615f76146b843b7"`
[INFO] running `"docker" "rm" "-f" "134cedbf0337246a7cce2ada0422ad82e5c6129f2f6f42ca6615f76146b843b7"`
[INFO] [stdout] 134cedbf0337246a7cce2ada0422ad82e5c6129f2f6f42ca6615f76146b843b7