Fix io.write() of newly created buffer.

Reported by vfprintf. #1386
2025-10-16 13:13:51 +02:00
parent 54a162688e
commit a69aef43fe
1 changed files with 1 additions and 1 deletions
--- a/src/lj_strfmt.c
+++ b/src/lj_strfmt.c
@@ -170,7 +170,7 @@ const char *lj_strfmt_wstrnum(lua_State *L, cTValue *o, MSize *lenp)
  } else if (tvisbuf(o)) {
    SBufExt *sbx = bufV(o);
    *lenp = sbufxlen(sbx);
-    return sbx->r;
+    return sbx->r ? sbx->r : "";
  } else if (tvisint(o)) {
    sb = lj_strfmt_putint(lj_buf_tmp_(L), intV(o));
  } else if (tvisnum(o)) {