Qt Crash while displaying certain Utf8 strings

I have been using Qt since 4.6.0. This bug has been around forever, even in the latest release.

Please note that the crash doesn't happen 100% of the time. You might have to try a few times until it pops up, but as it is a very simple application that shouldn't be an issue.

There are a few things worth noting that I observed:

1) QString::fromUtf8() alone doesn't trigger the crash. For example loading the list of users into a zero size QListView will not cause the application to crash, the strings have to be visible for the crash to appear. - I am not sure what that implies, but there you go

2) The crash appears after all the data has been loaded, not in the middle of loading the data. That supports (1)

And this is about it. From my point of view this is a rather serious crash bug, as many gamers using the tool I created started getting it. This made me look into it, and I realized it's been there for years.

This is my first bug report, I hope it's helpful. If you need anything else please let me know

Note: move the "users.50.txt" into the release directory