--- src/synfig/filesystem.cpp~	2018-09-08 01:09:32.000000000 -0500
+++ src/synfig/filesystem.cpp	2019-05-03 09:43:13.355426957 -0500
@@ -184,7 +184,7 @@
 {
 	String fixed = etl::cleanup_path(filename);
 	if (fixed == ".") fixed = "";
-	for(size_t i = 0; i < filename.size(); ++i)
+	for(size_t i = 0; i < fixed.size(); ++i)
 		if (fixed[i] == '\\') fixed[i] = '/';
 	return fixed;
 }