https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86986
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |rejects-valid Status|UNCONFIRMED |NEW Last reconfirmed| |2018-08-17 Known to work| |4.8.5 Summary|Unexpected errors for |[6/7/8/9 Regression] |template parameter pack in |Unexpected errors for |a template template |template parameter pack in |parameter |a template template | |parameter Ever confirmed|0 |1 Known to fail| |4.9.0, 5.5.0, 6.4.0, 7.3.0, | |8.2.0, 9.0 --- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- GCC 4.8 compiled it too, so this is a regression.