fix #12640 (#15829)

tests/pragmas/t12640.nim

@@ -0,0 +1,25 @@
+discard """
+  nimout: '''1
+2
+3
+[1, 2, 3]'''
+
+  output: '''1
+2
+3
+[1, 2, 3]'''
+"""
+
+
+proc doIt(a: openArray[int]) =
+  echo a
+
+proc foo() = 
+  var bug {.global, compiletime.}: seq[int]
+  bug = @[1, 2 ,3]
+  for i in 0 .. high(bug): echo bug[i]
+  doIt(bug)
+
+static:
+  foo()
+foo()