fixed compile time excl cause SIGSEGV #3639

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