[INFO] updating cached repository ottiker/flow_rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ottiker/flow_rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ottiker/flow_rust" "work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/ottiker/flow_rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/ottiker/flow_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ottiker/flow_rust" "work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/ottiker/flow_rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/ottiker/flow_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 66f431feebb31ca3d86be857430a5b9e963855d6
[INFO] sha for GitHub repo ottiker/flow_rust: 66f431feebb31ca3d86be857430a5b9e963855d6
[INFO] validating manifest of ottiker/flow_rust on toolchain master#c43d03a19f326f4a323569328cc501e86eb6d22e
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ottiker/flow_rust on toolchain try#75eff020d0923c035c2fe220db4a0465cd847048
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ottiker/flow_rust
[INFO] removed path dependency flow from ottiker/flow_rust
[INFO] finished frobbing ottiker/flow_rust
[INFO] frobbed toml for ottiker/flow_rust written to work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/ottiker/flow_rust/Cargo.toml
[INFO] started frobbing ottiker/flow_rust
[INFO] removed path dependency flow from ottiker/flow_rust
[INFO] finished frobbing ottiker/flow_rust
[INFO] frobbed toml for ottiker/flow_rust written to work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/ottiker/flow_rust/Cargo.toml
[INFO] crate ottiker/flow_rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/ottiker/flow_rust/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking ottiker/flow_rust against master#c43d03a19f326f4a323569328cc501e86eb6d22e for pr-63565
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63565/worker-6/master#c43d03a19f326f4a323569328cc501e86eb6d22e:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/ottiker/flow_rust:/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=forbid" "-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" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] b2aefccc3be74e9ce02aee6275e91cbbf78ee24502dceca1ee469911293fb14d
[INFO] running `"docker" "start" "-a" "b2aefccc3be74e9ce02aee6275e91cbbf78ee24502dceca1ee469911293fb14d"`
[INFO] [stderr] warning: dependency (flow) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr]    Compiling ncurses v5.99.0
[INFO] [stderr]     Checking flow v0.3.5
[INFO] [stderr] error[E0658]: use of unstable library feature 'option_result_contains'
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/flow-0.3.5/src/ui/input.rs:93:17
[INFO] [stderr]    |
[INFO] [stderr] 93 |         if name.contains('^') {
[INFO] [stderr]    |                 ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/62358
[INFO] [stderr]    = help: add `#![feature(option_result_contains)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/flow-0.3.5/src/ui/input.rs:93:26
[INFO] [stderr]    |
[INFO] [stderr] 93 |         if name.contains('^') {
[INFO] [stderr]    |                          ^^^
[INFO] [stderr]    |                          |
[INFO] [stderr]    |                          expected reference, found char
[INFO] [stderr]    |                          help: consider borrowing here: `&'^'`
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `&_`
[INFO] [stderr]               found type `char`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `chars` found for type `std::option::Option<std::string::String>` in the current scope
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/flow-0.3.5/src/ui/input.rs:95:40
[INFO] [stderr]    |
[INFO] [stderr] 95 |             let value = Key::Char(name.chars().last().unwrap());
[INFO] [stderr]    |                                        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0308, E0599, E0658.
[INFO] [stderr] For more information about an error, try `rustc --explain E0308`.
[INFO] [stderr] error: Could not compile `flow`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "b2aefccc3be74e9ce02aee6275e91cbbf78ee24502dceca1ee469911293fb14d"`
[INFO] running `"docker" "rm" "-f" "b2aefccc3be74e9ce02aee6275e91cbbf78ee24502dceca1ee469911293fb14d"`
[INFO] [stdout] b2aefccc3be74e9ce02aee6275e91cbbf78ee24502dceca1ee469911293fb14d