1512920 - Debugger isn’t pausing for breakpoints or exceptions

Status: RESOLVED WORKSFORME

(DevTools :: Debugger, defect)

Description

[Chris Morgan]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:65.0) Gecko/20100101 Firefox/65.0

Steps to reproduce:

1. Open a web page with some sort of readily-triggered exception.
2. Open the Debugger tab of the dev tools.
3. Ensure “Pause on exceptions” is turned on.
4. For good measure, even add a breakpoint on a line that is definitely run.
5. Just to make absolutely sure, add a line `debugger` before the exception.


Actual results:

The exception is thrown. The debugger doesn’t stop at any point.


Expected results:

It should have stopped at the breakpoint, the `debugger;` statement and the exception.


This is a regression from the last couple of weeks or so. It’s not *quite* consistently reproducible: I have another thing on the file: scheme using ES modules (possibly significant, possibly not) where it *does* stop, but locks up the browser completely a second or two later, like it’s busy waiting on the UI thread or something, requiring a manual restart. That behaviour started at the same time.

In short, the debugger is currently completely non-functional for me at present: either it doesn’t work, or it works and I wish it hadn’t.


I’m using both https: and file: URLs to test this.

Comment 1

[Jason Laster [:jlast]]

Hmm, could you provide a test case perhaps by forking http://dbg.glitch.me/?

Comment 2

[Panos Astithas (he/him) [:past] (please ni?)]

(In reply to Jason Laster [:jlast] from comment #1)
> Hmm, could you provide a test case perhaps by forking http://dbg.glitch.me/?

Comment 3

[Chris Morgan]

I can no longer reproduce it, so I presume it has been fixed. 👍

Comment 4

[Chris Morgan]

Turns out I was wrong; it is still a bug. I’ve opened bug 1516941 to replace this closed bug.