[INFO] crate custom-slice-macros 0.1.1 is already in cache
[INFO] extracting crate custom-slice-macros 0.1.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/custom-slice-macros/0.1.1
[INFO] extracting crate custom-slice-macros 0.1.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/custom-slice-macros/0.1.1
[INFO] validating manifest of custom-slice-macros-0.1.1 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 custom-slice-macros-0.1.1 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 custom-slice-macros-0.1.1
[INFO] finished frobbing custom-slice-macros-0.1.1
[INFO] frobbed toml for custom-slice-macros-0.1.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/custom-slice-macros/0.1.1/Cargo.toml
[INFO] started frobbing custom-slice-macros-0.1.1
[INFO] finished frobbing custom-slice-macros-0.1.1
[INFO] frobbed toml for custom-slice-macros-0.1.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/custom-slice-macros/0.1.1/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 custom-slice-macros-0.1.1 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/custom-slice-macros/0.1.1:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] b0b9cdf4b576a9bb20acb4e90e6065a52b83e736c30e0a3af8d8bfe8de251f55
[INFO] running `"docker" "start" "-a" "b0b9cdf4b576a9bb20acb4e90e6065a52b83e736c30e0a3af8d8bfe8de251f55"`
[INFO] [stderr]    Compiling custom-slice-macros v0.1.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.33s
[INFO] running `"docker" "inspect" "b0b9cdf4b576a9bb20acb4e90e6065a52b83e736c30e0a3af8d8bfe8de251f55"`
[INFO] running `"docker" "rm" "-f" "b0b9cdf4b576a9bb20acb4e90e6065a52b83e736c30e0a3af8d8bfe8de251f55"`
[INFO] [stdout] b0b9cdf4b576a9bb20acb4e90e6065a52b83e736c30e0a3af8d8bfe8de251f55
[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/custom-slice-macros/0.1.1:/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] c8fd833bb37f7445870813b71380a78836acaf249b462b8086e8261251781dd1
[INFO] running `"docker" "start" "-a" "c8fd833bb37f7445870813b71380a78836acaf249b462b8086e8261251781dd1"`
[INFO] [stderr]    Compiling custom-slice-macros v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] error: proc macro panicked
[INFO] [stderr]    --> tests/derives.rs:48:13
[INFO] [stderr]     |
[INFO] [stderr] 48  | /             custom_slice_macros::define_slice_types_pair! {
[INFO] [stderr] 49  | |                 #[custom_slice(owned)]
[INFO] [stderr] 50  | |                 $(#[$meta_owned])*
[INFO] [stderr] 51  | |                 struct Owned($owned_inner);
[INFO] [stderr] ...   |
[INFO] [stderr] 59  | |                 fn validate(_: &$slice_inner) -> Result<(), $ty_error> $body
[INFO] [stderr] 60  | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr] ...
[INFO] [stderr] 227 | /     gen_test! {
[INFO] [stderr] 228 | |         name: try_from_inner,
[INFO] [stderr] 229 | |         #[custom_slice(derive(TryFromInner))]
[INFO] [stderr] 230 | |         #[custom_slice(error(r#type = "()"))]
[INFO] [stderr] ...   |
[INFO] [stderr] 236 | |         validator: () { Ok(()) },
[INFO] [stderr] 237 | |     }
[INFO] [stderr]     | |_____- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: message: `#[custom_slice(error(type = "..."))]` should be specified
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `custom-slice-macros`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "c8fd833bb37f7445870813b71380a78836acaf249b462b8086e8261251781dd1"`
[INFO] running `"docker" "rm" "-f" "c8fd833bb37f7445870813b71380a78836acaf249b462b8086e8261251781dd1"`
[INFO] [stdout] c8fd833bb37f7445870813b71380a78836acaf249b462b8086e8261251781dd1