Merge pull request #3651 from jangko/vm_'excl'

fixed compile time `excl ` cause SIGSEGV #3639

compiler/vm.nim

@@ -618,7 +618,7 @@ proc rawExecute(c: PCtx, start: int, tos: PStackFrame): TFullReg =
       addSon(regs[ra].node, r.copyTree)
     of opcExcl:
       decodeB(rkNode)
-      var b = newNodeIT(nkCurly, regs[rb].node.info, regs[rb].node.typ)
+      var b = newNodeIT(nkCurly, regs[ra].node.info, regs[ra].node.typ)
       addSon(b, regs[rb].regToNode)
       var r = diffSets(regs[ra].node, b)
       discardSons(regs[ra].node)

tests/vm/texcl.nim

@@ -0,0 +1,27 @@
+discard """
+  output: '''false'''
+"""
+
+import macros
+
+type
+  nlOptions = enum
+    nloNone
+    nloDebug
+
+var nlOpts {.compileTime.} = {nloDebug}
+
+proc initOpts(): set[nlOptions] =
+  result.incl nloDebug
+  result.incl nloNone
+  result.excl nloDebug
+  
+const cOpts = initOpts()
+
+macro nlo(): stmt =
+  nlOpts.incl(nloNone)
+  nlOpts.excl(nloDebug)
+  result = newEmptyNode()
+
+nlo()
+echo nloDebug in cOpts