re PR debug/14492 (loc_descriptor_from_tree, in dwarf2out.c:9031)

PR c/14492
	* dwarf2out.c (loc_descriptor_from_tree): Robustify.

	PR c/14492
	* gcc.dg/debug/crash1.c: New test.

From-SVN: r86461

gcc/ChangeLog

@@ -1,3 +1,8 @@
+2004-08-23  Mark Mitchell  <mark@codesourcery.com>
+
+	PR c/14492
+	* dwarf2out.c (loc_descriptor_from_tree): Robustify.
+
 2004-08-23  Diego Novillo  <dnovillo@redhat.com>
 
 	* cfg.c (check_bb_profile): Fix typos.

gcc/dwarf2out.c

@@ -9244,9 +9244,15 @@ loc_descriptor_from_tree_1 (tree loc, int want_address)
           >= (unsigned int) LAST_AND_UNUSED_TREE_CODE)
 	return 0;
 
+#ifdef ENABLE_CHECKING
       /* Otherwise this is a generic code; we should just lists all of
 	 these explicitly.  Aborting means we forgot one.  */
       abort ();
+#else
+      /* In a release build, we want to degrade gracefully: better to
+	 generate incomplete debugging information than to crash.  */
+      return NULL;
+#endif
     }
 
   /* Show if we can't fill the request for an address.  */

gcc/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2004-08-23  Mark Mitchell  <mark@codesourcery.com>
+
+	PR c/14492
+	* gcc.dg/debug/crash1.c: New test.
+
 2004-08-23  Mark Mitchell  <mark@codesourcery.com>
 
 	PR c/16180

gcc/testsuite/gcc.dg/debug/crash1.c

@@ -0,0 +1,8 @@
+/* PR c/14492 */
+/* { dg-options "" } */
+
+int main() {
+  double d = 1.0;
+  char x[(int) d];
+  return 0;
+}