Fix bytecode dump unpatching.

Reported by Christopher Oliver.

1 files changed, 1 insertions, 4 deletions

diff --git a/src/lj_bcwrite.c b/src/lj_bcwrite.c
index fae1ebb3..171a8d6d 100644
--- a/src/lj_bcwrite.c
+++ b/src/lj_bcwrite.c
@@ -258,10 +258,7 @@ static void bcwrite_bytecode(BCWriteCtx *ctx, GCproto *pt)
         p[LJ_ENDIAN_SELECT(0, 3)] = (uint8_t)(op-BC_IFORL+BC_FORL);
       } else if (op == BC_JFORL || op == BC_JITERL || op == BC_JLOOP) {
         BCReg rd = p[LJ_ENDIAN_SELECT(2, 1)] + (p[LJ_ENDIAN_SELECT(3, 0)] << 8);
-        BCIns ins = traceref(J, rd)->startins;
-        p[LJ_ENDIAN_SELECT(0, 3)] = (uint8_t)(op-BC_JFORL+BC_FORL);
-        p[LJ_ENDIAN_SELECT(2, 1)] = bc_c(ins);
-        p[LJ_ENDIAN_SELECT(3, 0)] = bc_b(ins);
+        memcpy(p, &traceref(J, rd)->startins, 4);
       }
     }
   }