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-rw-r--r--erts/emulator/beam/erl_bits.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/erts/emulator/beam/erl_bits.c b/erts/emulator/beam/erl_bits.c
index 872ded4be7..73765772c8 100644
--- a/erts/emulator/beam/erl_bits.c
+++ b/erts/emulator/beam/erl_bits.c
@@ -1491,7 +1491,7 @@ erts_bs_private_append(Process* p, Eterm bin, Eterm build_size_term, Uint unit)
bptr->flags = 0;
bptr->orig_size = new_size;
erts_refc_init(&bptr->refc, 1);
- sys_memcpy(bptr->orig_bytes, binp->orig_bytes, pb->size);
+ sys_memcpy(bptr->orig_bytes, binp->orig_bytes, binp->orig_size);
pb->flags |= PB_IS_WRITABLE | PB_ACTIVE_WRITER;
pb->val = bptr;
pb->bytes = (byte *) bptr->orig_bytes;