[INFO] crate ion 0.8.4 is already in cache
[INFO] extracting crate ion 0.8.4 into work/ex/beta-1.38-1/sources/1.37.0/reg/ion/0.8.4
[INFO] extracting crate ion 0.8.4 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/ion/0.8.4
[INFO] validating manifest of ion-0.8.4 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 ion-0.8.4 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 ion-0.8.4
[INFO] finished frobbing ion-0.8.4
[INFO] frobbed toml for ion-0.8.4 written to work/ex/beta-1.38-1/sources/1.37.0/reg/ion/0.8.4/Cargo.toml
[INFO] started frobbing ion-0.8.4
[INFO] finished frobbing ion-0.8.4
[INFO] frobbed toml for ion-0.8.4 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/ion/0.8.4/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 ion-0.8.4 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/ion/0.8.4:/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] 1856495fdfacc90317d825aa64cdc52b3023543d78d5fdf6cc545d4be7d5e749
[INFO] running `"docker" "start" "-a" "1856495fdfacc90317d825aa64cdc52b3023543d78d5fdf6cc545d4be7d5e749"`
[INFO] [stderr]    Compiling ion v0.8.4 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(slice_patterns)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/parser.rs:171:21
[INFO] [stderr]     |
[INFO] [stderr] 171 |                 'a' ... 'z' |
[INFO] [stderr]     |                     ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(ellipsis_inclusive_range_patterns)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/parser.rs:172:21
[INFO] [stderr]     |
[INFO] [stderr] 172 |                 'A' ... 'Z' |
[INFO] [stderr]     |                     ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/parser.rs:173:21
[INFO] [stderr]     |
[INFO] [stderr] 173 |                 '0' ... '9' |
[INFO] [stderr]     |                     ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/parser.rs:274:17
[INFO] [stderr]     |
[INFO] [stderr] 274 |             '0' ... '9' => true,
[INFO] [stderr]     |                 ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/parser.rs:478:19
[INFO] [stderr]     |
[INFO] [stderr] 478 |     match c { '0' ... '9' => true, _ => false }
[INFO] [stderr]     |                   ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[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 `ion`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "1856495fdfacc90317d825aa64cdc52b3023543d78d5fdf6cc545d4be7d5e749"`
[INFO] running `"docker" "rm" "-f" "1856495fdfacc90317d825aa64cdc52b3023543d78d5fdf6cc545d4be7d5e749"`
[INFO] [stdout] 1856495fdfacc90317d825aa64cdc52b3023543d78d5fdf6cc545d4be7d5e749