Regex crashing pluma

[JamesR98]

Somewhat related to #538

Pluma version: 1.28

Steps to reproduce:

Text:

Line 1
Line 2

Find: ^
Replace: New

Expected result:

New Line 1
New Line 2

Actual Result:

Pluma freezes.

I'm not sure how to replace the start of a line but if it is not ^ there should be some sort of sanity check that will prevent the user from crashing pluma and losing unsaved changes.

[lukefromdc]

Just confirmed this. No freeze on selecting "find" but nothing is found. On selecting "replace" nothing happens. On selecting "replace all" pluma freezes and the error message repeats over and over in terminal.

(pluma:187777): Gtk-WARNING **: 02:21:17.134: Invalid text buffer iterator: either the iterator is uninitialized, or the characters/pixbufs/widgets in the buffer have been modified since the iterator was created.
You must use marks, character numbers, or line numbers to preserve a position across buffer modifications.
You can apply tags and insert marks without invalidating your iterators,
but any mutation that affects 'indexable' buffer contents (contents that can be referred to by character offset)
will invalidate all outstanding iterators

(pluma:187777): Gtk-CRITICAL **: 02:21:17.134: gtk_text_buffer_delete: assertion 'gtk_text_iter_get_buffer (end) == buffer' failed

I don't know much about regex matching but your test is simple.