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-rw-r--r--libgfortran/io/transfer.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libgfortran/io/transfer.c b/libgfortran/io/transfer.c
index d071c1c..cd51679 100644
--- a/libgfortran/io/transfer.c
+++ b/libgfortran/io/transfer.c
@@ -4500,7 +4500,7 @@ void
st_wait_async (st_parameter_wait *wtp)
{
gfc_unit *u = find_unit (wtp->common.unit);
- if (ASYNC_IO && u->au)
+ if (ASYNC_IO && u && u->au)
{
if (wtp->common.flags & IOPARM_WAIT_HAS_ID)
async_wait_id (&(wtp->common), u->au, *wtp->id);