[INFO] crate vcard 0.4.1 is already in cache
[INFO] extracting crate vcard 0.4.1 into work/ex/beta-1.37-6/sources/1.36.0/reg/vcard/0.4.1
[INFO] extracting crate vcard 0.4.1 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/vcard/0.4.1
[INFO] validating manifest of vcard-0.4.1 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 vcard-0.4.1 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 vcard-0.4.1
[INFO] finished frobbing vcard-0.4.1
[INFO] frobbed toml for vcard-0.4.1 written to work/ex/beta-1.37-6/sources/1.36.0/reg/vcard/0.4.1/Cargo.toml
[INFO] started frobbing vcard-0.4.1
[INFO] finished frobbing vcard-0.4.1
[INFO] frobbed toml for vcard-0.4.1 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/vcard/0.4.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded educe v0.2.0
[INFO] [stderr]   Downloaded base64-stream v1.0.6
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing vcard-0.4.1 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/vcard/0.4.1:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] dd9ad6fc6bce3885470e931f931405b6b6dcbbf6931aea4eeaba3cf865c1387d
[INFO] running `"docker" "start" "-a" "dd9ad6fc6bce3885470e931f931405b6b6dcbbf6931aea4eeaba3cf865c1387d"`
[INFO] [stderr]    Compiling oncemutex v0.1.1
[INFO] [stderr]    Compiling debug-helper v0.3.6
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling educe v0.2.0
[INFO] [stderr]    Compiling parse-zoneinfo v0.2.0
[INFO] [stderr]    Compiling quick-xml v0.13.3
[INFO] [stderr]    Compiling regex-cache v0.2.0
[INFO] [stderr]    Compiling phonenumber v0.2.3+8.10.6
[INFO] [stderr]    Compiling chrono-tz v0.5.1
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling chrono v0.4.7
[INFO] [stderr]    Compiling base64-stream v1.0.6
[INFO] [stderr]    Compiling validators v0.20.13
[INFO] [stderr] error: enum variants on type aliases are experimental
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/validators-0.20.13/src/host/mod.rs:103:9
[INFO] [stderr]     |
[INFO] [stderr] 103 |         impl_debug_for_enum!(Host::{(Domain(v): (let .v = v)), (IPv4(v): (let .v = v)), (IPv6(v): (let .v = v))}, f, self);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `validators`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "dd9ad6fc6bce3885470e931f931405b6b6dcbbf6931aea4eeaba3cf865c1387d"`
[INFO] running `"docker" "rm" "-f" "dd9ad6fc6bce3885470e931f931405b6b6dcbbf6931aea4eeaba3cf865c1387d"`
[INFO] [stdout] dd9ad6fc6bce3885470e931f931405b6b6dcbbf6931aea4eeaba3cf865c1387d