Toshio Kuratomi <[email protected]> added the comment:
I'm still debugging this but it may be an off-by-one error in ncurses,
wresize.c. I've found that if I modify the following section in ncurses, our
problem goes away:
/*
* Dispose of unwanted memory.
*/
if (!(win->_flags & _SUBWIN)) {
if (ToCols == size_x) {
for (row = ToLines + 1; row <= size_y; row++) {
free(win->_line[row].text);
}
} else {
for (row = 0; row <= size_y; row++) {
free(win->_line[row].text);
}
}
}
free(win->_line);
win->_line = new_lines;
Replacing:
for (row = ToLines + 1; row <= size_y; row++) {
with:
for (row = ToLines + 2; row <= size_y; row++) {
fixes this error. ToLines is a parameter passed in to wresize. wresize will
reuse ToLines number of rows from the old structure in the new structure. Due
to that, I think that the chances are good that it is ncurses which is at fault
here. I will try to rewrite the test case into a C program and then submit a
bug report to ncurses upstream. I'm not sure that there's a way we can work
around this until that's fixed.
----------
nosy: +a.badger
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<https://bugs.python.org/issue35924>
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