[INFO] crate intercom-attributes 0.2.0 is already in cache
[INFO] extracting crate intercom-attributes 0.2.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/intercom-attributes/0.2.0
[INFO] extracting crate intercom-attributes 0.2.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/intercom-attributes/0.2.0
[INFO] validating manifest of intercom-attributes-0.2.0 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 intercom-attributes-0.2.0 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 intercom-attributes-0.2.0
[INFO] finished frobbing intercom-attributes-0.2.0
[INFO] frobbed toml for intercom-attributes-0.2.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/intercom-attributes/0.2.0/Cargo.toml
[INFO] started frobbing intercom-attributes-0.2.0
[INFO] finished frobbing intercom-attributes-0.2.0
[INFO] frobbed toml for intercom-attributes-0.2.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/intercom-attributes/0.2.0/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 intercom-attributes-0.2.0 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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/intercom-attributes/0.2.0:/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] 73e85c7c070e48e8ec20bca2597081a58b6d1811288bf1f9668cc12a03f2eea6
[INFO] running `"docker" "start" "-a" "73e85c7c070e48e8ec20bca2597081a58b6d1811288bf1f9668cc12a03f2eea6"`
[INFO] [stderr]    Compiling sha1 v0.3.0
[INFO] [stderr]    Compiling intercom-common v0.2.0
[INFO] [stderr]    Compiling intercom-attributes v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] error: found removed `do catch` syntax
[INFO] [stderr]    --> src/lib.rs:177:9
[INFO] [stderr]     |
[INFO] [stderr] 177 |         do catch {
[INFO] [stderr]     |         ^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: Following RFC #2388, the new non-placeholder syntax is `try`
[INFO] [stderr] 
[INFO] [stderr] error: found removed `do catch` syntax
[INFO] [stderr]    --> src/lib.rs:400:9
[INFO] [stderr]     |
[INFO] [stderr] 400 |         do catch {
[INFO] [stderr]     |         ^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: Following RFC #2388, the new non-placeholder syntax is `try`
[INFO] [stderr] 
[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(proc_macro)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(catch_expr)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(type_ascription)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 5 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `intercom-attributes`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "73e85c7c070e48e8ec20bca2597081a58b6d1811288bf1f9668cc12a03f2eea6"`
[INFO] running `"docker" "rm" "-f" "73e85c7c070e48e8ec20bca2597081a58b6d1811288bf1f9668cc12a03f2eea6"`
[INFO] [stdout] 73e85c7c070e48e8ec20bca2597081a58b6d1811288bf1f9668cc12a03f2eea6