To fix this I have to first stop incrementally updating screen_bottom1
in the middle of a frame. Now it always has a good value from the end of
a frame.
I'm also running into some limitations in the test I'd ideally like to
write (that are documented in a comment), but I still get some sort of
automated test for this bugfix.
It's a hack:
- if you start selecting from below final line the start of the
selection is the most recent click even if it was forever ago
- (the crash we're currently fixing) if you start up and immediately
select all then click below final line => crash. recent_mouse was
never set.
- getting rid of it breaks no tests (except the crash we're currently
fixing)
Text.mouse_pos can sometimes set recent_mouse.time but not
recent_mouse.x/y. I'd assumed x/y is never nil in those situations, but
that's violated. It's most easily seen when typing C-a and then
clicking.
The bug has been spotted twice:
1. In snap.love, I selected text in one node, then another, and hit:
Error: text.lua:789: attempt to compare nil with number
stack traceback:
text.lua:789: in function 'lt1'
select.lua:19: in function 'clip_selection'
text.lua:32: in function 'draw'
edit.lua:117: in function 'draw'
[string "REPL"]:21: in function 'draw'
main.lua:152: in function 'draw'
app.lua:102: in function <app.lua:84>
[C]: in function 'xpcall'
app.lua:112: in function <app.lua:111>
[C]: in function 'xpcall'
Couldn't reproduce.
2. In text.love, inscript selected all text in a small buffer and then
clicked outside the text. And got:
Error: text.lua:784: attempt to compare nil with number
Traceback
[love "callbacks.lua"]:228: in function 'handler'
text.lua:784: in function 'lt1'
select.lua:19: in function 'clip_selection'
text.lua:27: in function 'draw'
edit.lua:117: in function 'draw'
run.lua:136: in function 'draw'
main.lua:148: in function 'draw'
app.lua:42: in function <app.lua:22>
[C]: in function 'xpcall'
This is reproducible, and also across forks.
Broken since 2022-09 X-(
Scenario:
* switch to source editor
* draw a line
* wait 3 seconds
Before this commit the app would crash and then fail to restart until
you deleted the created .lua file from save dir.
This is not the first time I've confused Lua's files and LÖVE's
droppedFile objects. Just never rely on multiple args in file:write().
Kartik K. Agaram