fix arc global variable issues (#20759)

* temp

* unsure

compiler/injectdestructors.nim

@@ -490,8 +490,11 @@ proc pVarTopLevel(v: PNode; c: var Con; s: var Scope; res: PNode) =
       res.add newTree(nkFastAsgn, v, genDefaultCall(v.typ, c, v.info))
   elif sfThread notin v.sym.flags and sfCursor notin v.sym.flags:
     # do not destroy thread vars for now at all for consistency.
-    if sfGlobal in v.sym.flags and s.parent == nil: #XXX: Rethink this logic (see tarcmisc.test2)
-      c.graph.globalDestructors.add c.genDestroy(v)
+    if sfGlobal in v.sym.flags: #XXX: Rethink this logic (see tarcmisc.test2)
+      if c.inLoop > 0:
+        s.final.add c.genDestroy(v)
+      else:
+        c.graph.globalDestructors.add c.genDestroy(v)
     else:
       s.final.add c.genDestroy(v)
 

tests/arc/tarcmisc.nim

@@ -124,7 +124,7 @@ proc test(count: int) =
 test(3)
 
 proc test2(count: int) =
-  #block: #XXX: Fails with block currently
+  block: #XXX: Fails with block currently
     var v {.global.} = newVariable(20)
 
     var count = count - 1