Breakpoints outside {} clear when the scala file is saved

Migrated from http://lampsvn.epfl.ch/trac/scala/ticket/1901
Reporter PointyStick
Problem :
Breakpoints set outside {} braces clear when the scala file is trivially edited then saved. The breakpoints disappear from the editor and the Breakpoint window.
Expected outcome :
Breakpoints persist, and behave in the same way as breakpoints inside {} braces
Repro :

Create a new scala file
Write def main() = 0
Save & Set a breakpoint
Add a space after the 0, and save again
Breakpoint disappears
Now replace with :

def main() = {
0
}

Save & set a breakpoint on 0
Add a space after the 0
Breakpoint persists

Leave a comment

on 2009-04-19 11:05 *

By tracImporter

Trac author: ijuma
CC Change: mlists@…

on 2010-06-01 20:26 *

By MattRussell

Break point updates on save are handled by

org.eclipse.jdt.internal.debug.ui.BreakpointMarkerUpdater.updateMarker

which attempts to parse the source as Java and then fix up the breakpoint positions with
a ValidBreakpointLocationLocator. I guess the surprising thing is that this works even some of the time! If you're lucky, it'll get enough accidental "Java" structure that it can preserve the breakpoint -- which is why the braces makes a difference. The whole widget really needs swapping out for something Scala aware.

on 2010-08-10 17:05 *

By MattRussell

Duplicated association with ticket #1000105 was added