[INFO] crate ia 0.1.2 is already in cache [INFO] extracting crate ia 0.1.2 into work/ex/beta-1.37-6/sources/1.36.0/reg/ia/0.1.2 [INFO] extracting crate ia 0.1.2 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/ia/0.1.2 [INFO] validating manifest of ia-0.1.2 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 ia-0.1.2 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 ia-0.1.2 [INFO] finished frobbing ia-0.1.2 [INFO] frobbed toml for ia-0.1.2 written to work/ex/beta-1.37-6/sources/1.36.0/reg/ia/0.1.2/Cargo.toml [INFO] started frobbing ia-0.1.2 [INFO] finished frobbing ia-0.1.2 [INFO] frobbed toml for ia-0.1.2 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/ia/0.1.2/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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] testing ia-0.1.2 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-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/ia/0.1.2:/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] 0c82bfc4c1e747db40f4afe1a07cc683b1ae062433b91686dc6a05931d9dbc1f [INFO] running `"docker" "start" "-a" "0c82bfc4c1e747db40f4afe1a07cc683b1ae062433b91686dc6a05931d9dbc1f"` [INFO] [stderr] Compiling ia v0.1.2 (/opt/crater/workdir) [INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel [INFO] [stderr] --> src/lib.rs:71:1 [INFO] [stderr] | [INFO] [stderr] 71 | #![feature(fnbox)] [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] error[E0658]: The `!` type is experimental [INFO] [stderr] --> src/executor.rs:7:51 [INFO] [stderr] | [INFO] [stderr] 7 | fut: UnsafeCell + 'static>> [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = note: for more information, see https://github.com/rust-lang/rust/issues/35121 [INFO] [stderr] [INFO] [stderr] error[E0658]: The `!` type is experimental [INFO] [stderr] --> src/executor.rs:11:47 [INFO] [stderr] | [INFO] [stderr] 11 | fn new(fut: Box + 'static>) -> TaskInfo { [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = note: for more information, see https://github.com/rust-lang/rust/issues/35121 [INFO] [stderr] [INFO] [stderr] error[E0658]: The `!` type is experimental [INFO] [stderr] --> src/executor.rs:17:64 [INFO] [stderr] | [INFO] [stderr] 17 | fn get_future(&self) -> &mut Box + 'static> { [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = note: for more information, see https://github.com/rust-lang/rust/issues/35121 [INFO] [stderr] [INFO] [stderr] error[E0658]: The `!` type is experimental [INFO] [stderr] --> src/utils.rs:14:18 [INFO] [stderr] | [INFO] [stderr] 14 | type Error = !; [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = note: for more information, see https://github.com/rust-lang/rust/issues/35121 [INFO] [stderr] [INFO] [stderr] error[E0658]: The `!` type is experimental [INFO] [stderr] --> src/utils.rs:18:28 [INFO] [stderr] | [INFO] [stderr] 18 | ) -> Result, !> { [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = note: for more information, see https://github.com/rust-lang/rust/issues/35121 [INFO] [stderr] [INFO] [stderr] error[E0658]: The `!` type is experimental [INFO] [stderr] --> src/net.rs:18:18 [INFO] [stderr] | [INFO] [stderr] 18 | type Error = !; [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = note: for more information, see https://github.com/rust-lang/rust/issues/35121 [INFO] [stderr] [INFO] [stderr] error[E0658]: The `!` type is experimental [INFO] [stderr] --> src/net.rs:22:47 [INFO] [stderr] | [INFO] [stderr] 22 | ) -> Result>, !> { [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = note: for more information, see https://github.com/rust-lang/rust/issues/35121 [INFO] [stderr] [INFO] [stderr] error: aborting due to 8 previous errors [INFO] [stderr] [INFO] [stderr] Some errors have detailed explanations: E0554, E0658. [INFO] [stderr] For more information about an error, try `rustc --explain E0554`. [INFO] [stderr] error: Could not compile `ia`. [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] running `"docker" "inspect" "0c82bfc4c1e747db40f4afe1a07cc683b1ae062433b91686dc6a05931d9dbc1f"` [INFO] running `"docker" "rm" "-f" "0c82bfc4c1e747db40f4afe1a07cc683b1ae062433b91686dc6a05931d9dbc1f"` [INFO] [stdout] 0c82bfc4c1e747db40f4afe1a07cc683b1ae062433b91686dc6a05931d9dbc1f