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sysListView32.List.columnCount can send to a null HWND #3843

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nvaccessAuto opened this issue Feb 3, 2014 · 2 comments
Closed

sysListView32.List.columnCount can send to a null HWND #3843

nvaccessAuto opened this issue Feb 3, 2014 · 2 comments

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@nvaccessAuto
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Reported by jteh on 2014-02-03 10:48
It fetches the header window, but doesn't check whether the result is null. This seems to happen when pressing backspace in Windows Explorer in Windows XP. We shouldn't send messages to a null HWND, though this is normally harmless.

@LeonarddeR
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@jcsteh: Is this XP only? If so, we can safely close as won't fix.

@jcsteh
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jcsteh commented Jul 18, 2017

Windows XP was the only place i could reproduce this, but I guess it could happen if a SysListView32 disappeared while NVDA was querying it. Still, this is harmless and clearly no one has cared for years, so closing.

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