[QScintilla] Possible bug with 'selectedText' while Ctrl+Mouse movement

[Phil Thompson]

On 22/04/2020 15:00, Matic Kukovec wrote:
>> On 21/04/2020 21:11, Matic Kukovec wrote:
>>> Hi,
>>> 
>>> This bug is only present on Linux!
>>> 
>>> In the attachment is an example of the error. How to reproduce it:
>>> Without changing any text inside the QScintilla editor, set the
>> cursor
>>> to the beginning of the first line, press and hold the CTRL key
>> and
>>> drag the mouse to the end of the first line. After selecting a few
>>> characters, usually more than 5 or 6, the example throws a
>> exception,
>>> something like:
>>> 
>>> *** Error in `/usr/bin/python3': free(): invalid next size (fast):
>>> 0x01e8d3e8 ***
>>> Aborted
>>> 
>>> The error appears to happen when calling the selectedText method,
>>> while the CTRL key is pressed and changing the selected text with
>> the
>>> mouse.
>>> The returned string from selectedText is not correct, which is
>> visible
>>> in the console window in the example just before the exception is
>>> thrown.
>>> 
>>> This error was found and reproduced in multiple editors,
>> including:
>>> ExCo, mu-editor and meditor.
>>> Probably every editor based on QScintilla has this issue.
>>> 
>>> Tested on:
>>> 
>>> *   Lubuntu x64, PyQt 5.11.2, QScintilla 2.11.4
>>> *   Raspbian RaspberryPI 3 (arm), PyQt 5.7, QScintilla 2.9.3
>> 
>> Works fine for me with current versions.
>> 
>> Phil
> 
> Hi Phil,
> 
> Nope, tried with PyQt 5.14.2 and QScintilla 2.11.4, same error:

What version of Python?

Phil