1018454 - Stepping disabled after breakpoint is hit

Status: RESOLVED FIXED

(DevTools :: Debugger, defect)

Description

[Nick Fitzgerald [:fitzgen] [⏰PST; UTC-8]]

STR: 

1. Clone https://github.com/fitzgen/wu.js
2. Checkout 7bb63d89e15af1def9f0f86f5a421a038ef0fdb3
3. Open test-es5/test.html
4. Set a BP on test-enumerate.js line 4
5. Refresh

ER:

Hit the BP

AR:

Execution pauses like you hit the BP, but the stepping buttons are disabled like you didn't pause and you can't step.

This is what I'm seeing in the console:

"""
A promise chain failed to handle a rejection.

Date: Fri May 30 2014 18:00:28 GMT-0400 (EDT)
Full Message: TypeError: cm.lineInfo(...) is null

debugger.js:107
"""

Which (for posterity) is the "let markers = ..." line here:

> function hasBreakpoint(ctx, line) {
>   let { cm } = ctx;
>   let markers = cm.lineInfo(line).gutterMarkers;
> 
>   return markers != null &&
>     markers.breakpoints.classList.contains("breakpoint");
> }

Comment 2

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

I'm reopening because the patch in bug 957174 fixes the displayed error, but the stepping buttons still look disabled. It must be a different issue with an error that is swallowed.

Comment 3

[Jason Laster [:jlast]]

this only affected the old ui