patch 9.0.1701: vim9 crash when class member overridden
Problem: vim9 crash when class member overridden
Solution: Use method_count field instead
closes: #12676
closes: #12677
Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Yegappan Lakshmanan <yegappan@yahoo.com>
diff --git a/src/testdir/test_vim9_class.vim b/src/testdir/test_vim9_class.vim
index f1acdf3..4936c53 100644
--- a/src/testdir/test_vim9_class.vim
+++ b/src/testdir/test_vim9_class.vim
@@ -1874,5 +1874,43 @@
unlet g:result
enddef
+" The following test used to crash Vim (Github issue #12676)
+def Test_extends_method_crashes_vim()
+ var lines =<< trim END
+ vim9script
+
+ class Observer
+ endclass
+
+ class Property
+ this.value: any
+
+ def Set(v: any)
+ if v != this.value
+ this.value = v
+ endif
+ enddef
+
+ def Register(observer: Observer)
+ enddef
+ endclass
+
+ class Bool extends Property
+ this.value: bool
+ endclass
+
+ def Observe(obj: Property, who: Observer)
+ obj.Register(who)
+ enddef
+
+ var p = Bool.new(false)
+ var myObserver = Observer.new()
+
+ Observe(p, myObserver)
+
+ p.Set(true)
+ END
+ v9.CheckScriptSuccess(lines)
+enddef
" vim: ts=8 sw=2 sts=2 expandtab tw=80 fdm=marker