From e9e4b6d302b5e7e4a04a3c7f78cb561a2c156a37 Mon Sep 17 00:00:00 2001
From: Mike Pall <mike>
Date: Mon, 7 Apr 2025 09:22:07 +0200
Subject: [PATCH 1/2] Initialize unused value when specializing to cdata
 metatable.

Reported by jakitliang. #1354
---
 src/lj_record.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/lj_record.c b/src/lj_record.c
index 20a7ea36..d336f642 100644
--- a/src/lj_record.c
+++ b/src/lj_record.c
@@ -854,7 +854,10 @@ int lj_record_mm_lookup(jit_State *J, RecordIndex *ix, MMS mm)
       return 0;  /* No metamethod. */
     }
     /* The cdata metatable is treated as immutable. */
-    if (LJ_HASFFI && tref_iscdata(ix->tab)) goto immutable_mt;
+    if (LJ_HASFFI && tref_iscdata(ix->tab)) {
+      mix.tab = TREF_NIL;
+      goto immutable_mt;
+    }
     ix->mt = mix.tab = lj_ir_ktab(J, mt);
     goto nocheck;
   }

From e76bb50d44702f601ec5dd167b03b475ed53860c Mon Sep 17 00:00:00 2001
From: Mike Pall <mike>
Date: Mon, 7 Apr 2025 10:27:40 +0200
Subject: [PATCH 2/2] Fix error generation in load*.

Reported by Sergey Kaplun. #1353
---
 src/lj_load.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/lj_load.c b/src/lj_load.c
index 90a61027..6c8ae9f1 100644
--- a/src/lj_load.c
+++ b/src/lj_load.c
@@ -108,8 +108,9 @@ LUALIB_API int luaL_loadfilex(lua_State *L, const char *filename,
     copyTV(L, L->top-1, L->top);
   }
   if (err) {
+    const char *fname = filename ? filename : "stdin";
     L->top--;
-    lua_pushfstring(L, "cannot read %s: %s", chunkname+1, strerror(err));
+    lua_pushfstring(L, "cannot read %s: %s", fname, strerror(err));
     return LUA_ERRFILE;
   }
   return status;