fix: added guard for edge case causing potential panic

fredbi · fredbi · commit b75931b12f35 · 2025-12-08T21:13:17.000+01:00
* fixes #224 Signed-off-by: Frédéric BIDON <fredbi@yahoo.com>
diff --git a/expander.go b/expander.go
@@ -545,6 +545,9 @@ func expandParameterOrResponse(input any, resolver *schemaLoader, basePath strin
 		}
 
 		ref, sch, _ = getRefAndSchema(input)
+		if ref == nil {
+			ref = &Ref{} // empty ref
+		}
 	}
 
 	if ref.String() != "" {

Original file line number	Diff line number	Diff line change
`@@ -545,6 +545,9 @@ func expandParameterOrResponse(input any, resolver *schemaLoader, basePath strin`
`545`	`545`	`}`
`546`	`546`
`547`	`547`	`ref, sch, _ = getRefAndSchema(input)`
	`548`	`+ if ref == nil {`
	`549`	`+ ref = &Ref{} // empty ref`
	`550`	`+ }`
`548`	`551`	`}`
`549`	`552`
`550`	`553`	`if ref.String() != "" {`