Fixed a rare parse failure involving functions with a particular argu…

…ment configuration.
thought-machine · Mar 4, 2019 · 5fdf7b6 · 5fdf7b6
1 parent 753a854
commit 5fdf7b6
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diff --git a/ChangeLog b/ChangeLog
@@ -3,6 +3,7 @@ Version 13.4.8
 
     * Fix worker replacements that are not build labels not to be prefixed incorrectly.
     * Honour escape sequences in f-strings correctly.
+    * Fixed a rare parse failure involving functions with a particular argument configuration.
 
 
 Version 13.4.7

diff --git a/src/parse/asp/objects.go b/src/parse/asp/objects.go
@@ -610,7 +610,7 @@ func (f *pyFunc) validateType(s *scope, i int, expr *Expression) pyObject {
 	if f.types[i] == nil {
 		return val
 	} else if val == None {
-		if f.constants[i] == nil && f.defaults[i] == nil {
+		if f.constants[i] == nil && (f.defaults == nil || f.defaults[i] == nil) {
 			return val
 		}
 		return f.defaultArg(s, i, f.args[i])