diff --git a/src/lj_asm_mips.h b/src/lj_asm_mips.h
index 5b83e34d..2f64f491 100644
--- a/src/lj_asm_mips.h
+++ b/src/lj_asm_mips.h
@@ -456,7 +456,7 @@ static void asm_retf(ASMState *as, IRIns *ir)
   emit_addptr(as, base, -8*delta);
   asm_guard(as, MIPSI_BNE, RID_TMP,
 	    ra_allock(as, igcptr(pc), rset_exclude(RSET_GPR, base)));
-  emit_tsi(as, MIPSI_AL, RID_TMP, base, -8);
+  emit_tsi(as, MIPSI_AL, RID_TMP, base, (LJ_BE || LJ_FR2) ? -8 : -4);
 }
 
 /* -- Buffer operations --------------------------------------------------- */
diff --git a/src/lj_gc.c b/src/lj_gc.c
index 9cabdef0..69e78706 100644
--- a/src/lj_gc.c
+++ b/src/lj_gc.c
@@ -604,12 +604,11 @@ void lj_gc_finalize_cdata(lua_State *L)
 /* Free all remaining GC objects. */
 void lj_gc_freeall(global_State *g)
 {
-  MSize i, strmask;
+  MSize i;
   /* Free everything, except super-fixed objects (the main thread). */
   g->gc.currentwhite = LJ_GC_WHITES | LJ_GC_SFIXED;
   gc_fullsweep(g, &g->gc.root);
-  strmask = g->str.mask;
-  for (i = 0; i <= strmask; i++)  /* Free all string hash chains. */
+  for (i = g->str.mask; i != ~(MSize)0; i--)  /* Free all string hash chains. */
     gc_sweepstr(g, &g->str.tab[i]);
 }
 
diff --git a/src/lj_load.c b/src/lj_load.c
index 152ef6da..fa6ed5bf 100644
--- a/src/lj_load.c
+++ b/src/lj_load.c
@@ -102,12 +102,13 @@ LUALIB_API int luaL_loadfilex(lua_State *L, const char *filename,
   int status;
   const char *chunkname;
   if (filename) {
+    chunkname = lua_pushfstring(L, "@%s", filename);
     ctx.fp = fopen(filename, "rb");
     if (ctx.fp == NULL) {
+      L->top--;
       lua_pushfstring(L, "cannot open %s: %s", filename, strerror(errno));
       return LUA_ERRFILE;
     }
-    chunkname = lua_pushfstring(L, "@%s", filename);
   } else {
     ctx.fp = stdin;
     chunkname = "=stdin";