1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/tree.c b/gcc/tree.c
index 4441bc0..95d4d5e 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -8819,7 +8819,9 @@ block_nonartificial_location (tree block)
     {
       tree ao = BLOCK_ABSTRACT_ORIGIN (block);
 
-      while (TREE_CODE (ao) == BLOCK && BLOCK_ABSTRACT_ORIGIN (ao))
+      while (TREE_CODE (ao) == BLOCK
+	     && BLOCK_ABSTRACT_ORIGIN (ao)
+	     && BLOCK_ABSTRACT_ORIGIN (ao) != ao)
 	ao = BLOCK_ABSTRACT_ORIGIN (ao);
 
       if (TREE_CODE (ao) == FUNCTION_DECL)