https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54890
Ville Voutilainen <ville.voutilainen at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- 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.