diff --git a/src/Makefile b/src/Makefile
index 5a2277cc79..7cb4c14ad9 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -209,7 +209,7 @@ TARGET_CC= $(STATIC_CC)
 TARGET_STCC= $(STATIC_CC)
 TARGET_DYNCC= $(DYNAMIC_CC)
 TARGET_LD= $(CROSS)$(CC)
-TARGET_AR= $(CROSS)ar rcus
+TARGET_AR= $(CROSS)ar rcus 2>/dev/null
 TARGET_STRIP= $(CROSS)strip
 
 TARGET_LIBPATH= $(or $(PREFIX),/usr/local)/$(or $(MULTILIB),lib)
@@ -313,7 +313,6 @@ ifeq (Darwin,$(TARGET_SYS))
     export MACOSX_DEPLOYMENT_TARGET=10.4
   endif
   TARGET_STRIP+= -x
-  TARGET_AR+= 2>/dev/null
   TARGET_XSHLDFLAGS= -dynamiclib -single_module -undefined dynamic_lookup -fPIC
   TARGET_DYNXLDOPTS=
   TARGET_XSHLDFLAGS+= -install_name $(TARGET_DYLIBPATH) -compatibility_version $(MAJVER).$(MINVER) -current_version $(MAJVER).$(MINVER).$(RELVER)
@@ -324,7 +323,6 @@ ifeq (Darwin,$(TARGET_SYS))
 else
 ifeq (iOS,$(TARGET_SYS))
   TARGET_STRIP+= -x
-  TARGET_AR+= 2>/dev/null
   TARGET_XSHLDFLAGS= -dynamiclib -single_module -undefined dynamic_lookup -fPIC
   TARGET_DYNXLDOPTS=
   TARGET_XSHLDFLAGS+= -install_name $(TARGET_DYLIBPATH) -compatibility_version $(MAJVER).$(MINVER) -current_version $(MAJVER).$(MINVER).$(RELVER)
diff --git a/src/lib_ffi.c b/src/lib_ffi.c
index 5b9e25eafc..136e98e896 100644
--- a/src/lib_ffi.c
+++ b/src/lib_ffi.c
@@ -829,7 +829,7 @@ static GCtab *ffi_finalizer(lua_State *L)
   settabV(L, L->top++, t);
   setgcref(t->metatable, obj2gco(t));
   setstrV(L, lj_tab_setstr(L, t, lj_str_newlit(L, "__mode")),
-	  lj_str_newlit(L, "K"));
+	  lj_str_newlit(L, "k"));
   t->nomm = (uint8_t)(~(1u<<MM_mode));
   return t;
 }
diff --git a/src/lj_gc.c b/src/lj_gc.c
index c82af662d2..2aaf5b2c4f 100644
--- a/src/lj_gc.c
+++ b/src/lj_gc.c
@@ -169,12 +169,19 @@ static int gc_traverse_tab(global_State *g, GCtab *t)
     while ((c = *modestr++)) {
       if (c == 'k') weak |= LJ_GC_WEAKKEY;
       else if (c == 'v') weak |= LJ_GC_WEAKVAL;
-      else if (c == 'K') weak = (int)(~0u & ~LJ_GC_WEAKVAL);
     }
-    if (weak > 0) {  /* Weak tables are cleared in the atomic phase. */
-      t->marked = (uint8_t)((t->marked & ~LJ_GC_WEAK) | weak);
-      setgcrefr(t->gclist, g->gc.weak);
-      setgcref(g->gc.weak, obj2gco(t));
+    if (weak) {  /* Weak tables are cleared in the atomic phase. */
+#if LJ_HASFFI
+      CTState *cts = ctype_ctsG(g);
+      if (cts && cts->finalizer == t) {
+	weak = (int)(~0u & ~LJ_GC_WEAKVAL);
+      } else
+#endif
+      {
+	t->marked = (uint8_t)((t->marked & ~LJ_GC_WEAK) | weak);
+	setgcrefr(t->gclist, g->gc.weak);
+	setgcref(g->gc.weak, obj2gco(t));
+      }
     }
   }
   if (weak == LJ_GC_WEAK)  /* Nothing to mark if both keys/values are weak. */
diff --git a/src/lj_mcode.c b/src/lj_mcode.c
index 0f29a3ce61..77035bf72a 100644
--- a/src/lj_mcode.c
+++ b/src/lj_mcode.c
@@ -204,10 +204,7 @@ static void mcode_protect(jit_State *J, int prot)
 
 /* -- MCode area allocation ----------------------------------------------- */
 
-#if LJ_TARGET_X64
-#define mcode_validptr(p)	((p) && (uintptr_t)(p) < (uintptr_t)1<<47)
-#elif LJ_TARGET_ARM64 || LJ_TARGET_MIPS64
-/* We have no clue about the valid VA range. It could be 39 - 52 bits. */
+#if LJ_64
 #define mcode_validptr(p)	(p)
 #else
 #define mcode_validptr(p)	((p) && (uintptr_t)(p) < 0xffff0000)
@@ -233,7 +230,8 @@ static void *mcode_alloc(jit_State *J, size_t sz)
   /* First try a contiguous area below the last one. */
   uintptr_t hint = J->mcarea ? (uintptr_t)J->mcarea - sz : 0;
   int i;
-  for (i = 0; i < 32; i++) {  /* 32 attempts ought to be enough ... */
+  /* Limit probing iterations, depending on the available pool size. */
+  for (i = 0; i < LJ_TARGET_JUMPRANGE; i++) {
     if (mcode_validptr(hint)) {
       void *p = mcode_alloc_at(J, hint, sz, MCPROT_GEN);
 
@@ -242,11 +240,11 @@ static void *mcode_alloc(jit_State *J, size_t sz)
 	return p;
       if (p) mcode_free(J, p, sz);  /* Free badly placed area. */
     }
-    /* Next try probing pseudo-random addresses. */
+    /* Next try probing 64K-aligned pseudo-random addresses. */
     do {
-      hint = (0x78fb ^ LJ_PRNG_BITS(J, 15)) << 16;  /* 64K aligned. */
-    } while (!(hint + sz < range));
-    hint = target + hint - (range>>1);
+      hint = LJ_PRNG_BITS(J, LJ_TARGET_JUMPRANGE-16) << 16;
+    } while (!(hint + sz < range+range));
+    hint = target + hint - range;
   }
   lj_trace_err(J, LJ_TRERR_MCODEAL);  /* Give up. OS probably ignores hints? */
   return NULL;
diff --git a/src/lj_parse.c b/src/lj_parse.c
index b5b7b6b44a..08f7cfa6ac 100644
--- a/src/lj_parse.c
+++ b/src/lj_parse.c
@@ -1282,12 +1282,14 @@ static void fscope_end(FuncState *fs)
       MSize idx = gola_new(ls, NAME_BREAK, VSTACK_LABEL, fs->pc);
       ls->vtop = idx;  /* Drop break label immediately. */
       gola_resolve(ls, bl, idx);
+    } else {  /* Need the fixup step to propagate the breaks. */
+      gola_fixup(ls, bl);
       return;
-    }  /* else: need the fixup step to propagate the breaks. */
-  } else if (!(bl->flags & FSCOPE_GOLA)) {
-    return;
+    }
+  }
+  if ((bl->flags & FSCOPE_GOLA)) {
+    gola_fixup(ls, bl);
   }
-  gola_fixup(ls, bl);
 }
 
 /* Mark scope as having an upvalue. */