Oct 13 08:35:57.125 INFO checking shortcut-4.1.2 against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 13 08:35:57.125 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-0/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-0/pr-54977/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/source:ro,Z" "-v" "/mnt/big/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +4021bd0b3c5815b087d6db10ce461e7e4854ade7-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Oct 13 08:35:57.484 INFO blam! 16cd217e25b48ee7271851e143c9f8077c5362e8df36611297e35cd61bb7ab65
Oct 13 08:35:57.489 INFO running `"docker" "start" "-a" "16cd217e25b48ee7271851e143c9f8077c5362e8df36611297e35cd61bb7ab65"`
Oct 13 08:35:58.844 INFO kablam! usermod: no changes
Oct 13 08:35:58.949 INFO kablam!     Checking shortcut v4.1.2 (/source)
Oct 13 08:35:59.921 INFO kablam! warning: variable does not need to be mutable
Oct 13 08:35:59.921 INFO kablam!   --> src/idx.rs:55:21
Oct 13 08:35:59.921 INFO kablam!    |
Oct 13 08:35:59.921 INFO kablam! 55 |         if let Some(mut l) = self.map.get_mut(key) {
Oct 13 08:35:59.921 INFO kablam!    |                     ----^
Oct 13 08:35:59.921 INFO kablam!    |                     |
Oct 13 08:35:59.921 INFO kablam!    |                     help: remove this `mut`
Oct 13 08:35:59.921 INFO kablam!    |
Oct 13 08:35:59.921 INFO kablam!    = note: #[warn(unused_mut)] on by default
Oct 13 08:35:59.921 INFO kablam! 
Oct 13 08:35:59.921 INFO kablam! warning: the feature `collections_bound` has been stable since 1.17.0 and no longer requires an attribute to enable
Oct 13 08:35:59.921 INFO kablam!   --> src/lib.rs:29:25
Oct 13 08:35:59.921 INFO kablam!    |
Oct 13 08:35:59.921 INFO kablam! 29 | #![feature(btree_range, collections_bound)]
Oct 13 08:35:59.921 INFO kablam!    |                         ^^^^^^^^^^^^^^^^^
Oct 13 08:35:59.921 INFO kablam!    |
Oct 13 08:35:59.921 INFO kablam!    = note: #[warn(stable_features)] on by default
Oct 13 08:35:59.921 INFO kablam! 
Oct 13 08:35:59.921 INFO kablam! warning: the feature `btree_range` has been stable since 1.17.0 and no longer requires an attribute to enable
Oct 13 08:35:59.921 INFO kablam!   --> src/lib.rs:29:12
Oct 13 08:35:59.921 INFO kablam!    |
Oct 13 08:35:59.921 INFO kablam! 29 | #![feature(btree_range, collections_bound)]
Oct 13 08:35:59.921 INFO kablam!    |            ^^^^^^^^^^^
Oct 13 08:35:59.921 INFO kablam! 
Oct 13 08:36:00.264 INFO kablam! warning: variable does not need to be mutable
Oct 13 08:36:00.264 INFO kablam!   --> src/idx.rs:55:21
Oct 13 08:36:00.264 INFO kablam!    |
Oct 13 08:36:00.264 INFO kablam! 55 |         if let Some(mut l) = self.map.get_mut(key) {
Oct 13 08:36:00.264 INFO kablam!    |                     ----^
Oct 13 08:36:00.264 INFO kablam!    |                     |
Oct 13 08:36:00.264 INFO kablam!    |                     help: remove this `mut`
Oct 13 08:36:00.264 INFO kablam!    |
Oct 13 08:36:00.264 INFO kablam!    = note: #[warn(unused_mut)] on by default
Oct 13 08:36:00.264 INFO kablam! 
Oct 13 08:36:00.289 INFO kablam! warning: the feature `collections_bound` has been stable since 1.17.0 and no longer requires an attribute to enable
Oct 13 08:36:00.289 INFO kablam!   --> src/lib.rs:29:25
Oct 13 08:36:00.289 INFO kablam!    |
Oct 13 08:36:00.289 INFO kablam! 29 | #![feature(btree_range, collections_bound)]
Oct 13 08:36:00.289 INFO kablam!    |                         ^^^^^^^^^^^^^^^^^
Oct 13 08:36:00.296 INFO kablam!    |
Oct 13 08:36:00.296 INFO kablam!    = note: #[warn(stable_features)] on by default
Oct 13 08:36:00.296 INFO kablam! 
Oct 13 08:36:00.296 INFO kablam! warning: the feature `btree_range` has been stable since 1.17.0 and no longer requires an attribute to enable
Oct 13 08:36:00.296 INFO kablam!   --> src/lib.rs:29:12
Oct 13 08:36:00.296 INFO kablam!    |
Oct 13 08:36:00.296 INFO kablam! 29 | #![feature(btree_range, collections_bound)]
Oct 13 08:36:00.296 INFO kablam!    |            ^^^^^^^^^^^
Oct 13 08:36:00.296 INFO kablam! 
Oct 13 08:36:01.789 INFO kablam! error[E0308]: mismatched types
Oct 13 08:36:01.789 INFO kablam!   --> benches/bench.rs:62:59
Oct 13 08:36:01.789 INFO kablam!    |
Oct 13 08:36:01.789 INFO kablam! 62 |             cmp: cmp::Comparison::Equal(cmp::Value::Const(format!("{}", i))),
Oct 13 08:36:01.789 INFO kablam!    |                                                           ^^^^^^^^^^^^^^^^ expected enum `std::borrow::Cow`, found struct `std::string::String`
Oct 13 08:36:01.789 INFO kablam!    |
Oct 13 08:36:01.789 INFO kablam!    = note: expected type `std::borrow::Cow<'_, _>`
Oct 13 08:36:01.792 INFO kablam!               found type `std::string::String`
Oct 13 08:36:01.792 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)
Oct 13 08:36:01.792 INFO kablam! 
Oct 13 08:36:01.799 INFO kablam! error: aborting due to previous error
Oct 13 08:36:01.803 INFO kablam! 
Oct 13 08:36:01.803 INFO kablam! For more information about this error, try `rustc --explain E0308`.
Oct 13 08:36:01.809 INFO kablam! error: Could not compile `shortcut`.
Oct 13 08:36:01.809 INFO kablam! 
Oct 13 08:36:01.809 INFO kablam! To learn more, run the command again with --verbose.
Oct 13 08:36:01.811 INFO kablam! su: No module specific data is present
Oct 13 08:36:02.208 INFO running `"docker" "rm" "-f" "16cd217e25b48ee7271851e143c9f8077c5362e8df36611297e35cd61bb7ab65"`
Oct 13 08:36:02.340 INFO blam! 16cd217e25b48ee7271851e143c9f8077c5362e8df36611297e35cd61bb7ab65