patch 8.2.4397: crash when using many composing characters in error message
Problem: Crash when using many composing characters in error message.
Solution: Use mb_cptr2char_adv() instead of mb_ptr2char_adv().
diff --git a/src/testdir/test_assert.vim b/src/testdir/test_assert.vim
index 8987f3f..27b2d73 100644
--- a/src/testdir/test_assert.vim
+++ b/src/testdir/test_assert.vim
@@ -53,6 +53,14 @@
call assert_equal("\b\e\f\n\t\r\\\x01\x7f", 'x')
call assert_match('Expected ''\\b\\e\\f\\n\\t\\r\\\\\\x01\\x7f'' but got ''x''', v:errors[0])
call remove(v:errors, 0)
+
+ " many composing characters are handled properly
+ call setline(1, ' ')
+ norm 100grƯ€
+ call assert_equal(1, getline(1))
+ call assert_match("Expected 1 but got '.* occurs 100 times]'", v:errors[0])
+ call remove(v:errors, 0)
+ bwipe!
endfunc
func Test_assert_equal_dict()