------- Comment #1 from jason at gcc dot gnu dot org 2010-07-09 21:11 ------- No, SFINAE should not apply here, because the ambiguous conversion is not in the context of template argument deduction.
See PR 41468 for some similar ambiguity issues that I fixed last month. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44896
