https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61382
--- Comment #4 from Thibaut LUTZ <thibaut.lutz at googlemail dot com> --- You're right, my bad. Thanks for correcting me. The exact quote is > Within the initializer-list of a braced-init-list, the initializer-clauses, > including any that result from pack expansions, are evaluated in the order in > which they appear. That is, every value computation and side effect > associated with a given initializer-clause is sequenced before every value > computation and side effect associated with any initializer-clause that > follows it in the comma-separated list of the initializer-list. So the increments *should* be sequenced. Sorry about the noise.