[Bug c++/54890] Incorrect SFINAE Rejection

[ville.voutilainen at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54890

Ville Voutilainen <ville.voutilainen at gmail dot com> changed:

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                 CC|                            |ville.voutilainen at gmail dot com

--- Comment #9 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
Ping. I don't know what to make of this. The code looks reasonable, but both
gcc and clang reject it, failing deduction.