no need for a backtrace if the file does not exist

diff --git a/src/surf/xml/surfxml_sax_cb.cpp b/src/surf/xml/surfxml_sax_cb.cpp
index 186b559..72e5825 100644 (file)
--- a/src/surf/xml/surfxml_sax_cb.cpp
+++ b/src/surf/xml/surfxml_sax_cb.cpp
@@ -1115,7 +1115,8 @@ void surf_parse_open(const char *file)
   xbt_free(dir);
 
   surf_file_to_parse = surf_fopen(file, "r");
-  xbt_assert(surf_file_to_parse != nullptr, "Unable to open '%s'\n", file);
+  if (surf_file_to_parse == nullptr)
+    xbt_die("Unable to open '%s'\n", file);
   surf_input_buffer = surf_parse__create_buffer(surf_file_to_parse, YY_BUF_SIZE);
   surf_parse__switch_to_buffer(surf_input_buffer);
   surf_parse_lineno = 1;