Sep 06 00:03:09.151 INFO checking shortcut-4.1.2 against try#51ff957df5095d92d1d3d4682207ee8b7ad408a8 for pr-53854
Sep 06 00:03:09.151 INFO running: cargo +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets
Sep 06 00:03:09.151 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-53854/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53854/worker-1/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/target:rw,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "CMD=cargo +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 06 00:03:09.264 INFO blam! f9f596d38b26b5b8a3d879f3e562d69e24b3c918ff01ab13d81d23c420d05c67
Sep 06 00:03:09.264 INFO running `"docker" "start" "-a" "f9f596d38b26b5b8a3d879f3e562d69e24b3c918ff01ab13d81d23c420d05c67"`
Sep 06 00:03:10.553 INFO kablam! usermod: no changes
Sep 06 00:03:10.602 INFO kablam!     Checking shortcut v4.1.2 (file:///source)
Sep 06 00:03:11.013 INFO kablam! warning: variable does not need to be mutable
Sep 06 00:03:11.013 INFO kablam!   --> src/idx.rs:55:21
Sep 06 00:03:11.013 INFO kablam!    |
Sep 06 00:03:11.013 INFO kablam! 55 |         if let Some(mut l) = self.map.get_mut(key) {
Sep 06 00:03:11.013 INFO kablam!    |                     ----^
Sep 06 00:03:11.013 INFO kablam!    |                     |
Sep 06 00:03:11.013 INFO kablam!    |                     help: remove this `mut`
Sep 06 00:03:11.013 INFO kablam!    |
Sep 06 00:03:11.013 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 06 00:03:11.013 INFO kablam! 
Sep 06 00:03:11.026 INFO kablam! warning: the feature `collections_bound` has been stable since 1.17.0 and no longer requires an attribute to enable
Sep 06 00:03:11.026 INFO kablam!   --> src/lib.rs:29:25
Sep 06 00:03:11.026 INFO kablam!    |
Sep 06 00:03:11.026 INFO kablam! 29 | #![feature(btree_range, collections_bound)]
Sep 06 00:03:11.026 INFO kablam!    |                         ^^^^^^^^^^^^^^^^^
Sep 06 00:03:11.026 INFO kablam!    |
Sep 06 00:03:11.026 INFO kablam!    = note: #[warn(stable_features)] on by default
Sep 06 00:03:11.026 INFO kablam! 
Sep 06 00:03:11.026 INFO kablam! warning: the feature `btree_range` has been stable since 1.17.0 and no longer requires an attribute to enable
Sep 06 00:03:11.026 INFO kablam!   --> src/lib.rs:29:12
Sep 06 00:03:11.026 INFO kablam!    |
Sep 06 00:03:11.026 INFO kablam! 29 | #![feature(btree_range, collections_bound)]
Sep 06 00:03:11.026 INFO kablam!    |            ^^^^^^^^^^^
Sep 06 00:03:11.026 INFO kablam! 
Sep 06 00:03:11.163 INFO kablam! warning: variable does not need to be mutable
Sep 06 00:03:11.163 INFO kablam!   --> src/idx.rs:55:21
Sep 06 00:03:11.163 INFO kablam!    |
Sep 06 00:03:11.163 INFO kablam! 55 |         if let Some(mut l) = self.map.get_mut(key) {
Sep 06 00:03:11.163 INFO kablam!    |                     ----^
Sep 06 00:03:11.163 INFO kablam!    |                     |
Sep 06 00:03:11.163 INFO kablam!    |                     help: remove this `mut`
Sep 06 00:03:11.163 INFO kablam!    |
Sep 06 00:03:11.163 INFO kablam!    = note: #[warn(unused_mut)] on by default
Sep 06 00:03:11.163 INFO kablam! 
Sep 06 00:03:11.183 INFO kablam! warning: the feature `collections_bound` has been stable since 1.17.0 and no longer requires an attribute to enable
Sep 06 00:03:11.183 INFO kablam!   --> src/lib.rs:29:25
Sep 06 00:03:11.183 INFO kablam!    |
Sep 06 00:03:11.183 INFO kablam! 29 | #![feature(btree_range, collections_bound)]
Sep 06 00:03:11.183 INFO kablam!    |                         ^^^^^^^^^^^^^^^^^
Sep 06 00:03:11.183 INFO kablam!    |
Sep 06 00:03:11.183 INFO kablam!    = note: #[warn(stable_features)] on by default
Sep 06 00:03:11.183 INFO kablam! 
Sep 06 00:03:11.183 INFO kablam! warning: the feature `btree_range` has been stable since 1.17.0 and no longer requires an attribute to enable
Sep 06 00:03:11.183 INFO kablam!   --> src/lib.rs:29:12
Sep 06 00:03:11.183 INFO kablam!    |
Sep 06 00:03:11.183 INFO kablam! 29 | #![feature(btree_range, collections_bound)]
Sep 06 00:03:11.183 INFO kablam!    |            ^^^^^^^^^^^
Sep 06 00:03:11.183 INFO kablam! 
Sep 06 00:03:11.427 INFO kablam! error[E0308]: mismatched types
Sep 06 00:03:11.427 INFO kablam!   --> benches/bench.rs:62:59
Sep 06 00:03:11.427 INFO kablam!    |
Sep 06 00:03:11.427 INFO kablam! 62 |             cmp: cmp::Comparison::Equal(cmp::Value::Const(format!("{}", i))),
Sep 06 00:03:11.427 INFO kablam!    |                                                           ^^^^^^^^^^^^^^^^ expected enum `std::borrow::Cow`, found struct `std::string::String`
Sep 06 00:03:11.427 INFO kablam!    |
Sep 06 00:03:11.427 INFO kablam!    = note: expected type `std::borrow::Cow<'_, _>`
Sep 06 00:03:11.427 INFO kablam!               found type `std::string::String`
Sep 06 00:03:11.427 INFO kablam!    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Sep 06 00:03:11.427 INFO kablam! 
Sep 06 00:03:11.442 INFO kablam! error: aborting due to previous error
Sep 06 00:03:11.442 INFO kablam! 
Sep 06 00:03:11.442 INFO kablam! For more information about this error, try `rustc --explain E0308`.
Sep 06 00:03:11.451 INFO kablam! error: Could not compile `shortcut`.
Sep 06 00:03:11.451 INFO kablam! 
Sep 06 00:03:11.451 INFO kablam! To learn more, run the command again with --verbose.
Sep 06 00:03:11.453 INFO kablam! su: No module specific data is present
Sep 06 00:03:12.146 INFO running `"docker" "rm" "-f" "f9f596d38b26b5b8a3d879f3e562d69e24b3c918ff01ab13d81d23c420d05c67"`
Sep 06 00:03:12.233 INFO blam! f9f596d38b26b5b8a3d879f3e562d69e24b3c918ff01ab13d81d23c420d05c67