vim 9.0.698, columns=100,lines=55
Two files with only one line: screen lines: longer ~90, shorter ~34
command: gvim/vim -u NONE -U NONE
then: set smoothscroll
There are no asan errors. Trying to figure out valgrind now.
Any hints/suggestions on tracking it down, like what to look at in the
debugger, welcome.
=== vim longer # the longer file, ~90 screen lines
=== test 1: gvim -u NONE -U NONE longer
- ^E the screen does not scroll. The cursor moves to the next screen
line (as it should) for a small fraction of a second, then back.
=== test 2: gvim -u NONE -U NONE longer
- click somewhere in the middle of the line, several screen lines down.
- ^E,^Y work as expected, until the cursor gets to the top, then it
behaves as described in test 1 above.
=== vim shorter # the shorter file, ~34 screen lines
===== test 1: gvim -u NONE -U NONE shorter
- ^E a few times, screen scrolls as expected
- ^Y once, display jumps so first line is visible, and cursor is
on the first line, and not one screen line from where it was.
===== test 2: gvim -u NONE -U NONE shorter
- click somewhere in the middle of the line, several screen lines down.
- ^E scrolls up 1 screen line. But the cursor does not move, it stays
at the same screen location, instead of staying on the same character.
- Do a few more ^E, same pattern.
- Do ^Y and it stays on the same character as expected, keep going
until no change, first characters of file are visible at the top.
- Do ^E, screen scrolls one line, cursor jumps to where it should be.
-ernie
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