[Agda] Bizzare error

[Philip Wadler]

The attached file yields the following error when compiled via ^C^L:

/Users/wadler/Desktop/Lambda.lagda.md:522,5-5
/Users/wadler/Desktop/Lambda.lagda.md:522,5: Lexical error (you may want to
replace tabs with spaces):
refl<ERROR>

However, if you delete the large commented portion that follows line 522 it
compiles perfectly well. What is the problem? What is a workaround?

I'm using
Agda version 2.6.1.1-fce01db

Go well, -- P

.   \ Philip Wadler, Professor of Theoretical Computer Science,
.   /\ School of Informatics, University of Edinburgh
.  /  \ and Senior Research Fellow, IOHK
. http://homepages.inf.ed.ac.uk/wadler/
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