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-rw-r--r--gcc/c-typeck.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/c-typeck.c b/gcc/c-typeck.c
index 40207c4..db66823 100644
--- a/gcc/c-typeck.c
+++ b/gcc/c-typeck.c
@@ -5822,8 +5822,10 @@ output_init_element (value, type, field, pending)
&& !tree_int_cst_equal (field, constructor_unfilled_index))
{
if (! duplicate)
+ /* The copy_node is needed in case field is actually
+ constructor_index, which is modified in place. */
constructor_pending_elts
- = tree_cons (field,
+ = tree_cons (copy_node (field),
digest_init (type, value, 0, 0),
constructor_pending_elts);
}