arni2033 Reporter
	Description • 8 years ago

>>>   My Info:   Win7_64, Nightly 49, 32bit, ID 20160526082509
STR_1:  (most interesting)
0. Open debugger, enable "Pause on exceptions" and "Auto prettify minified sources", close devtools.
1. Open url [1]
2. Open debugger
3. Click on the page

AR:  The right sidebar doesn't display <exception>. It's unclear why debugger has stopped
ER:  <exception> should be visible in "variables" tab


STR_2:
1. Open url [1]
2. Open debugger, enable "Pause on exceptions"
3. Click on the page
4. Prettify the script

AR:  Step 3 - <exception> is visible in "variables" tab.  Step 4 - <exception> disappears from sidebar
ER:  Step 4 - <exception> should still be visible

Notes:
1) In STR_1 Step 2 it's important that script starting with "onbeforeunload" is selected in debugger
   If you couldn't reproduce it, please understand that it's a real-world scenario: I initially
   selected a random script, and debugger stops in another script. If that "another script" is
   minified and wasn't loaded yet, it'll be prettified automatically and I'll run into this bug.
2) If I click "Step in", "Step out", "Step over", <exception> appears again. However, if I click
  "Click to resume", I can never know that debugger stopped on exception (i.e. not randomly stopped),
   try url [2] with only 1 function in call stack. After bug 1092922 url [1] will also be affected.

> [1] data:text/html,<script src="data:text/javascript,onbeforeunload=function(){}"></script><script src="data:text/javascript,onclick=function(){F()};function F(){return window.val.func()}; val='asdf'//.min.js"></script><script src="data:text/javascript,oncut=function(){}"></script>
> [2] data:text/html,<script src="data:text/javascript,onbeforeunload=function(){}"></script><script src="data:text/javascript,onclick=function(){return window.val.func()}; val='asdf'//.min.js"></script><script src="data:text/javascript,oncut=function(){}"></script>