[INFO] updating cached repository tomaka/cargo-emscripten
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/tomaka/cargo-emscripten
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/tomaka/cargo-emscripten" "work/ex/beta-1.37-6/sources/1.36.0/gh/tomaka/cargo-emscripten"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/tomaka/cargo-emscripten'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tomaka/cargo-emscripten" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/tomaka/cargo-emscripten"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/tomaka/cargo-emscripten'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d4eaa466e9c0f2cfcbcf828eda34ec5fd1f6d682
[INFO] sha for GitHub repo tomaka/cargo-emscripten: d4eaa466e9c0f2cfcbcf828eda34ec5fd1f6d682
[INFO] validating manifest of tomaka/cargo-emscripten on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of tomaka/cargo-emscripten on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing tomaka/cargo-emscripten
[INFO] finished frobbing tomaka/cargo-emscripten
[INFO] frobbed toml for tomaka/cargo-emscripten written to work/ex/beta-1.37-6/sources/1.36.0/gh/tomaka/cargo-emscripten/Cargo.toml
[INFO] started frobbing tomaka/cargo-emscripten
[INFO] finished frobbing tomaka/cargo-emscripten
[INFO] frobbed toml for tomaka/cargo-emscripten written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/tomaka/cargo-emscripten/Cargo.toml
[INFO] crate tomaka/cargo-emscripten already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/tomaka/cargo-emscripten/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Updating git repository `https://github.com/rust-lang/cargo`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/rust-lang/cargo`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded git2 v0.9.2
[INFO] [stderr]   Downloaded libgit2-sys v0.8.2
[INFO] [stderr]   Downloaded git2-curl v0.10.1
[INFO] [stderr]   Downloaded jobserver v0.1.16
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing tomaka/cargo-emscripten against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/tomaka/cargo-emscripten:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] ec678cbf7f7be06ca0518df0e7d6cfccdc3b7163c238a41ecbb1af92aad7e91a
[INFO] running `"docker" "start" "-a" "ec678cbf7f7be06ca0518df0e7d6cfccdc3b7163c238a41ecbb1af92aad7e91a"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling percent-encoding v2.0.0
[INFO] [stderr]    Compiling curl v0.4.22
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling rustc-workspace-hack v1.0.0
[INFO] [stderr]    Compiling opener v0.4.0
[INFO] [stderr]    Compiling home v0.3.4
[INFO] [stderr]    Compiling shell-escape v0.1.4
[INFO] [stderr]    Compiling bytesize v1.0.0
[INFO] [stderr]    Compiling libnghttp2-sys v0.1.1
[INFO] [stderr]    Compiling libgit2-sys v0.8.2
[INFO] [stderr]    Compiling curl-sys v0.4.20
[INFO] [stderr]    Compiling vte v0.3.3
[INFO] [stderr]    Compiling idna v0.2.0
[INFO] [stderr]    Compiling socket2 v0.3.10
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling bstr v0.2.6
[INFO] [stderr]    Compiling crossbeam-channel v0.3.9
[INFO] [stderr]    Compiling sized-chunks v0.3.0
[INFO] [stderr]    Compiling jobserver v0.1.16
[INFO] [stderr]    Compiling tar v0.4.26
[INFO] [stderr]    Compiling flate2 v1.0.9
[INFO] [stderr]    Compiling strip-ansi-escapes v0.1.0
[INFO] [stderr]    Compiling crypto-hash v0.3.3
[INFO] [stderr]    Compiling env_logger v0.6.2
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/regex-0.2.11/src/lib.rs:522:34
[INFO] [stderr]     |
[INFO] [stderr] 522 | #![cfg_attr(feature = "pattern", feature(pattern))]
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]    Compiling globset v0.4.4
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling serde_json v1.0.40
[INFO] [stderr]    Compiling toml v0.5.1
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `regex`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "ec678cbf7f7be06ca0518df0e7d6cfccdc3b7163c238a41ecbb1af92aad7e91a"`
[INFO] running `"docker" "rm" "-f" "ec678cbf7f7be06ca0518df0e7d6cfccdc3b7163c238a41ecbb1af92aad7e91a"`
[INFO] [stdout] ec678cbf7f7be06ca0518df0e7d6cfccdc3b7163c238a41ecbb1af92aad7e91a