--- a/lib/regexec.c	2020-10-21 14:25:35.310195912 +0000
+++ b/lib/regexec.c	2020-11-05 10:55:09.621542984 +0000
@@ -1692,6 +1692,9 @@
 {
   Idx top = mctx->state_log_top;

+  if (mctx->state_log == NULL)
+    return REG_NOERROR;
+
   if ((next_state_log_idx >= mctx->input.bufs_len
        && mctx->input.bufs_len < mctx->input.len)
       || (next_state_log_idx >= mctx->input.valid_len