patch 8.2.3910: when compare function of sort() fails it does not abort
Problem: When the compare function of sort() produces and error then sort()
does not abort.
Solution: Check if did_emsg was incremented.
diff --git a/src/testdir/test_vim9_builtin.vim b/src/testdir/test_vim9_builtin.vim
index 088afe8..6cad1e4 100644
--- a/src/testdir/test_vim9_builtin.vim
+++ b/src/testdir/test_vim9_builtin.vim
@@ -3524,6 +3524,17 @@
CheckDefAndScriptFailure(['sort([1], "", [1])'], ['E1013: Argument 3: type mismatch, expected dict<any> but got list<number>', 'E1206: Dictionary required for argument 3'])
enddef
+def Test_sort_compare_func_fails()
+ var lines =<< trim END
+ vim9script
+ echo ['a', 'b', 'c']->sort((a: number, b: number) => 0)
+ END
+ writefile(lines, 'Xbadsort')
+ assert_fails('source Xbadsort', ['E1013:', 'E702:'])
+
+ delete('Xbadsort')
+enddef
+
def Test_spellbadword()
CheckDefAndScriptFailure(['spellbadword(100)'], ['E1013: Argument 1: type mismatch, expected string but got number', 'E1174: String required for argument 1'])
spellbadword('good')->assert_equal(['', ''])