patch 9.0.2000: Vim9: use-after-free in deep call stack
Problem: Vim9: use-after-free in deep call stack
Solution: Get the objct pointer from execution stack
closes: #13296
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 0c8fd70..0e70c9f 100644
--- a/src/testdir/test_vim9_class.vim
+++ b/src/testdir/test_vim9_class.vim
@@ -6989,4 +6989,44 @@
call v9.CheckSourceSuccess(lines)
endfunc
+" Test for recursively calling an object method. This used to cause an
+" use-after-free error.
+def Test_recursive_object_method_call()
+ var lines =<< trim END
+ vim9script
+ class A
+ this.val: number = 0
+ def Foo(): number
+ if this.val >= 90
+ return this.val
+ endif
+ this.val += 1
+ return this.Foo()
+ enddef
+ endclass
+ var a = A.new()
+ assert_equal(90, a.Foo())
+ END
+ v9.CheckSourceSuccess(lines)
+enddef
+
+" Test for recursively calling a class method.
+def Test_recursive_class_method_call()
+ var lines =<< trim END
+ vim9script
+ class A
+ static val: number = 0
+ static def Foo(): number
+ if val >= 90
+ return val
+ endif
+ val += 1
+ return Foo()
+ enddef
+ endclass
+ assert_equal(90, A.Foo())
+ END
+ v9.CheckSourceSuccess(lines)
+enddef
+
" vim: ts=8 sw=2 sts=2 expandtab tw=80 fdm=marker