Syntax error in code and rls consumes half my ram and 100% of my CPU

[jeena]

I had a syntax error in my code:

        let login: gtk::Dialog = gtk::Dialog::new_with_buttons(Some("Login"),
                                                                Some(&widget),
                                                                gtk::DialogFlags::MODAL | g
                                                                tk::DialogFlags::DESTROY_WITH_PARENT |
                                                                gtk::DialogFlags::USE_HEADER_BAR,
                                                                &[cancel_button, login_button]);

And when using GNOME Builder my computer started behaving really weird until I closed Builder. I checked top and it showed that rls was using one core 100% and 52% of my 16 GB RAM when Builder was running. The mouse stopped working, YouTube playback started stuttering and I couldn't basically use my computer until I closed Builder. rustc wasn't able to compile it either but instead giving me a syntax error it got killed after some time:

error: could not compile `feedthemonkey`.

Caused by:
  process didn't exit successfully: `rustc --crate-name feedthemonkey --edition=2018 src/main.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type bin --emit=dep-info,link -Cembed-bitcode=no -C debuginfo=2 -C metadata=865c8db208de96f3 -C extra-filename=-865c8db208de96f3 --out-dir /home/jeena/.cache/gnome-builder/projects/FeedTheMonkey/builds/net.jeena.feedthemonkey.json-flatpak-org.gnome.Platform-x86_64-3.34-master/target/debug/deps -C incremental=/home/jeena/.cache/gnome-builder/projects/FeedTheMonkey/builds/net.jeena.feedthemonkey.json-flatpak-org.gnome.Platform-x86_64-3.34-master/target/debug/incremental -L dependency=/home/jeena/.cache/gnome-builder/projects/FeedTheMonkey/builds/net.jeena.feedthemonkey.json-flatpak-org.gnome.Platform-x86_64-3.34-master/target/debug/deps --extern gdk=/home/jeena/.cache/gnome-builder/projects/FeedTheMonkey/builds/net.jeena.feedthemonkey.json-flatpak-org.gnome.Platform-x86_64-3.34-master/target/debug/deps/libgdk-e4b722cd8d9463f2.rlib --extern gettextrs=/home/jeena/.cache/gnome-builder/projects/FeedTheMonkey/builds/net.jeena.feedthemonkey.json-flatpak-org.gnome.Platform-x86_64-3.34-master/target/debug/deps/libgettextrs-ea5a2d7dbdfe566e.rlib --extern gio=/home/jeena/.cache/gnome-builder/projects/FeedTheMonkey/builds/net.jeena.feedthemonkey.json-flatpak-org.gnome.Platform-x86_64-3.34-master/target/debug/deps/libgio-f7947b8dfd7a35ba.rlib --extern glib=/home/jeena/.cache/gnome-builder/projects/FeedTheMonkey/builds/net.jeena.feedthemonkey.json-flatpak-org.gnome.Platform-x86_64-3.34-master/target/debug/deps/libglib-e7c2c93c3f636c78.rlib --extern gtk=/home/jeena/.cache/gnome-builder/projects/FeedTheMonkey/builds/net.jeena.feedthemonkey.json-flatpak-org.gnome.Platform-x86_64-3.34-master/target/debug/deps/libgtk-7e1f83000f401ea8.rlib` (signal: 9, SIGKILL: kill)
FAILED: src/feedthemonkey 

The syntax error is that g at the end of line 3 which was supposed to be in line 4. So while rustc at least timed out rls just kept cranking and making my computer unusable. I just wanted to report it because I guess it's a rare occurence that something like that happens but it was nicely reproducable. As soon as I fixed the syntax error the problems stopped.