Lens does not compile under GHC 7.7

[wdanilo]

As in the title - Lens does not compile under GHC 7.7:

src/Control/Lens/Internal/Exception.hs:165:3:
    ‛typeOf’ is not a (visible) method of class ‛Typeable’

src/Control/Lens/Internal/Exception.hs:168:14:
    ‛typeOf’ is not a (visible) method of class ‛Typeable’
Failed to install lens-3.10.1

[mxswd]

This is due to the new typeable in base 4.7.

lens-3.10.* could get a maintenance release, but probably not till a GHC 7.8 RC is out.

lens-4 is already compatible with 7.8, you should use that.

[wdanilo]

Thank you, but what is lens-4? I do not see it anywhere.

[mxswd]

Sorry, as in the HEAD version from GitHub.