https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55922
--- Comment #11 from DB <db0451 at gmail dot com> --- This still occurs in 6.3.0 In the duplicate https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80849 I showed that whether or not this occurs can sometimes (I say because my results don't seem consistent with everyone else's) depend on the number of arguments that are given to (all of) the constructors. I could not replicate the problem with my test case if the constructors were invoked with brace syntax and all had no or 1 argument, but I could when they had 2 or more arguments.