FFI: Handle zero-fill of struct-of-NYI.

1 files changed, 19 insertions, 1 deletions

diff --git a/src/lj_crecord.c b/src/lj_crecord.c
index c7b60b3a..be23cd62 100644
--- a/src/lj_crecord.c
+++ b/src/lj_crecord.c
@@ -1024,8 +1024,26 @@ static void crec_alloc(jit_State *J, RecordFFData *rd, CTypeID id)
         crec_ct_tv(J, dc, dp, sp, sval);
       }
     } else if (ctype_isstruct(d->info)) {
-      CTypeID fid = d->sib;
+      CTypeID fid;
       MSize i = 1;
+      if (!J->base[1]) {  /* Handle zero-fill of struct-of-NYI. */
+        fid = d->sib;
+        while (fid) {
+          CType *df = ctype_get(cts, fid);
+          fid = df->sib;
+          if (ctype_isfield(df->info)) {
+            CType *dc;
+            if (!gcref(df->name)) continue;  /* Ignore unnamed fields. */
+            dc = ctype_rawchild(cts, df);  /* Field type. */
+            if (!(ctype_isnum(dc->info) || ctype_isptr(dc->info) ||
+                  ctype_isenum(dc->info)))
+              goto special;
+          } else if (!ctype_isconstval(df->info)) {
+            goto special;
+          }
+        }
+      }
+      fid = d->sib;
       while (fid) {
         CType *df = ctype_get(cts, fid);
         fid = df->sib;