https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82611
ensadc at mailnesia dot com changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |ensadc at mailnesia dot com --- Comment #1 from ensadc at mailnesia dot com --- The diagnostic is required by the standard. [expr.prim.lambda.capture]/2 (http://wg21.link/expr.prim.lambda.capture#2.sentence-2): If a lambda-capture includes a capture-default that is =, each simple-capture of that lambda-capture shall be of the form “& identifier”, “this”, or “* this”.