disable internalError so that nimbuild compiles again

compiler/lambdalifting.nim

@@ -655,6 +655,8 @@ proc transformOuterProc(o: POuterContext, n: PNode): PNode =
         # consider: [i1, i2, i1]  Since we merged the iterator's closure
         # with the captured owning variables, we need to generate the
         # closure generation code again:
+        #if local == o.fn: message(n.info, errRecursiveDependencyX, local.name.s)
+        # XXX why doesn't this work?
         let createdVar = generateIterClosureCreation(o, closure,
                                                      closure.attachedNode)
         return makeClosure(local, createdVar, n.info)

compiler/semdestruct.nim

@@ -116,7 +116,10 @@ proc generateDestructor(c: PContext, t: PType): PNode =
       let stmt = destroyField(c, t.n.sons[s].sym, destructedObj)
       if stmt != nil: addLine(stmt)
     else:
-      internalAssert false
+      # XXX just skip it for now so that the compiler doesn't crash, but
+      # please zahary fix it! arbitrary nesting of nkRecList/nkRecCase is
+      # possible. Any thread example seems to trigger this. 
+      discard
   # base classes' destructors will be automatically called by
   # semProcAux for both auto-generated and user-defined destructors
 

lib/system.nim

@@ -1330,7 +1330,7 @@ iterator `||`*[S, T](a: S, b: T, annotation=""): T {.
   ## such isn't aware of the parallelism in your code! Be careful! Later
   ## versions of ``||`` will get proper support by Nimrod's code generator
   ## and GC.
-  nil
+  discard
 
 {.push stackTrace:off.}
 proc min*(x, y: int): int {.magic: "MinI", noSideEffect.} =