GtkGrid within scrolled window crashes for certain files

The crash occurs for a file of a certain size (see zcrash.txt), if size request of TextView is not big enough. Note that the text file has to have BOTH a large number of lines, AND one LONG line. See zcrash.txt.

The crash is BadAlloc. The problem exists under ubuntu 16/18/19, with gtk+-3.0 gdk-x11-3.0

As I understand it, the TextView should expand to accomodate content, and not require a size request. Is this wrong?

The design intent is to have two side-by-side Textviews, hence the need for the GtkGrid. Note the code was recenly converted from using GtkVBox - which had the same problem.

Results and widget hierarchies are:

CRASH:

make clean

make

• loads zcrash.txt and WITHOUT gtk_widget_set_size_request(m_aTV, 1000, 700); crashes.

• uncommenting gtk_widget_set_size_request(m_aTV, 1000, 700); fixes the crash. Search for SIZE_LINE.

m_win -> m_vScrWin -> m_vSubGrid -> m_aTV

NO CRASH:

make clean

make GCCFLAGS+=-DOK_BUILD

m_win -> m_vScrWin -> m_aTV

i.cpp - graphic code.

Uses g++, with gtk+-3.0 x11 gdk-x11-3.0 Xt

Executable is then simply:

i

zcrash.txt

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'''

```zok.txt - this always works```
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