Index: Modules/main.c
===================================================================
--- Modules/main.c	(revision 59710)
+++ Modules/main.c	(working copy)
@@ -137,6 +137,16 @@
 			PyErr_Clear();
 			fclose(fp);
 		}
+		else {
+            int save_errno;
+            save_errno = errno;
+            PySys_WriteStderr("Could not open PYTHONSTARTUP\n");
+            errno = save_errno;
+            PyErr_SetFromErrnoWithFilename(PyExc_IOError,
+                startup);
+            PyErr_Print();
+            PyErr_Clear();
+		}
 	}
 }