Issue 1658: EncoderForV3PlusClosures(EncoderForV3)>>genPushLiteral: doesNotUnderstand: #<

1.Ran full test suite (7266 run, 7223 passes, 21 expected failures, 9
failures, 13 errors, 0 unexpected passes)
2.store result as progress measurement
3.EncoderForV3PlusClosures throws above error. walkback attached to issue.