Fix error generation in load*.

Mike Pall · Mike Pall · commit e76bb50d4470 · 2025-04-07T10:27:40.000+02:00
Reported by Sergey Kaplun. #1353
diff --git 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;

Original file line number	Diff line number	Diff line change
`@@ -108,8 +108,9 @@ LUALIB_API int luaL_loadfilex(lua_State L, const char filename,`
`108`	`108`	`copyTV(L, L->top-1, L->top);`
`109`	`109`	`}`
`110`	`110`	`if (err) {`
	`111`	`+ const char *fname = filename ? filename : "stdin";`
`111`	`112`	`L->top--;`
`112`		`- lua_pushfstring(L, "cannot read %s: %s", chunkname+1, strerror(err));`
	`113`	`+ lua_pushfstring(L, "cannot read %s: %s", fname, strerror(err));`
`113`	`114`	`return LUA_ERRFILE;`
`114`	`115`	`}`
`115`	`116`	`return status;`