Re: [broken HEAD] In which the strict state monad fails at basic arithmetic

Moritz Angermann writes:

Hi *,

while working on some related code. I came across a rather peculiar behavior with GHC built from the current master branch at b2c2e3e8.

The issue was a bug indeed introduced by the commit you cite below. The problem was a mistake in a change in constant folding which, frighteningly, the testsuite did not catch. See D3904 for a fix and a test is forthcoming. Cheers, - Ben