--- b/cut-n-paste/synctex/synctex_parser.c
+++ a/cut-n-paste/synctex/synctex_parser.c
@@ -6030,6 +6030,7 @@
     if ((scanner->reader = synctex_reader_init_with_output_file(scanner->reader, output, build_directory))) {
         return parse? synctex_scanner_parse(scanner):scanner;
     }
+    _synctex_error("No file?");
     return NULL;
 }