From: Mike Pall <mike>
Date: Thu, 16 Oct 2025 11:13:51 +0000 (+0200)
Subject: Fix io.write() of newly created buffer.
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a69aef43fe1838da26c193d188580229b2387583;p=thirdparty%2FLuaJIT.git

Fix io.write() of newly created buffer.

Reported by vfprintf. #1386
---

diff --git a/src/lj_strfmt.c b/src/lj_strfmt.c
index 04aebaa4..bb649fc8 100644
--- 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)) {