Index: decl.c
===================================================================
--- decl.c	(Revision 195319)
+++ decl.c	(Arbeitskopie)
@@ -5979,6 +5979,8 @@ gfc_match_end (gfc_statement *st)
   const char *target;
   int eos_ok;
   match m;
+  gfc_namespace *parent_ns, *ns, *prev_ns;
+  gfc_namespace **nsp;
 
   old_loc = gfc_current_locus;
   if (gfc_match ("end") != MATCH_YES)
@@ -6204,6 +6206,35 @@ syntax:
 
 cleanup:
   gfc_current_locus = old_loc;
+
+  /* If we are missing an END BLOCK, we created a half-ready namespace.
+     Remove it from the parent namespace's sibling list.  */
+
+  if (state == COMP_BLOCK)
+    {
+      parent_ns = gfc_current_ns->parent;
+
+      nsp = &(gfc_state_stack->previous->tail->ext.block.ns);
+
+      prev_ns = NULL;
+      ns = *nsp;
+      while (ns)
+	{
+	  if (ns == gfc_current_ns)
+	    {
+	      if (prev_ns == NULL)
+		*nsp = NULL;
+	      else
+		prev_ns->sibling = ns->sibling;
+	    }
+	  prev_ns = ns;
+	  ns = ns->sibling;
+	}
+  
+      gfc_free_namespace (gfc_current_ns);
+      gfc_current_ns = parent_ns;
+    }
+
   return MATCH_ERROR;
 }
 
Index: parse.c
===================================================================
--- parse.c	(Revision 195319)
+++ parse.c	(Arbeitskopie)
@@ -4291,6 +4291,7 @@ parse_module (void)
 {
   gfc_statement st;
   gfc_gsymbol *s;
+  bool error;
 
   s = gfc_get_gsymbol (gfc_new_block->name);
   if (s->defined || (s->type != GSYM_UNKNOWN && s->type != GSYM_MODULE))
@@ -4304,6 +4305,7 @@ parse_module (void)
 
   st = parse_spec (ST_NONE);
 
+  error = false;
 loop:
   switch (st)
     {
@@ -4322,12 +4324,15 @@ loop:
       gfc_error ("Unexpected %s statement in MODULE at %C",
 		 gfc_ascii_statement (st));
 
+      error = true;
       reject_statement ();
       st = next_statement ();
       goto loop;
     }
 
-  s->ns = gfc_current_ns;
+  /* Make sure not to free the namespace twice on error.  */
+  if (!error)
+    s->ns = gfc_current_ns;
 }