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-rw-r--r--libgfortran/io/unix.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/libgfortran/io/unix.c b/libgfortran/io/unix.c
index 5be631a..8e3afbd 100644
--- a/libgfortran/io/unix.c
+++ b/libgfortran/io/unix.c
@@ -462,6 +462,9 @@ fd_alloc_w_at (unix_stream * s, int *len, gfc_offset where)
s->logical_offset = where + *len;
+ if (where + *len > s->file_length)
+ s->file_length = where + *len;
+
n = s->logical_offset - s->buffer_offset;
if (n > s->active)
s->active = n;