https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91391
--- Comment #5 from Stephan Bergmann <sbergman at redhat dot com> --- (In reply to Stephan Bergmann from comment #0) [...] > template-parameter-list, and I wonder whether it should warn about a > (hypothetical) comma expression in a call to an overloaded operator [] at > all. ([expr.pre]/2 "Overloaded operators obey the rules for syntax and evaluation order specified in [expr.compound], but the requirements of operand type and value category are replaced [...]", so it presumably shall warn there)
