Index: psymtab.c
===================================================================
RCS file: /cvs/src/src/gdb/psymtab.c,v
retrieving revision 1.30
diff -d -u -r1.30 psymtab.c
--- psymtab.c	10 Jun 2011 21:48:04 -0000	1.30
+++ psymtab.c	20 Jul 2011 18:18:10 -0000
@@ -1093,6 +1093,7 @@
       if (ps->readin)
 	continue;
 
+      QUIT;
       fullname = psymtab_to_fullname (ps);
       (*fun) (ps->filename, fullname, data);
     }