nested do blocks without extra indentation

[sebf@…]

HSE (0.5.5) fails to parse this program:

nestedDoBlocks = getChar >>= (\c1 -> do
                 getChar >>= (\c2 -> do
                 getChar >>= (\c3 -> return [c1,c2,c3])))

If the last line is indented one more space then it parses fine.

GHC parses both versions. I think it's more likely that this is a bug in GHC rather than HSE but am not sure..

[nibro]

Thanks for reporting. This is what's called the relaxed do-layout rules in GHC. It's a documented feature but it's not H98. It wasn't my intention to use it, but I've had several complaints about it, so I caved in. This now works in 0.5.6, case closed.