https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65673
--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
Btw, clang produces the following without any diagnostic:
.type .compoundliteral,@object # @.compoundliteral
.local .compoundliteral
.comm .compoundliteral,1,8
.type foo,@object # @foo
.data
.globl foo
.p2align 3, 0x0
foo:
.long 25 # 0x19
.zero 4
.quad .compoundliteral
.size foo, 16
and the C++ frontend accepts it producing
foo:
.long 25
.zero 4
.quad ._anon_0
.local ._anon_0
.comm ._anon_0,0,8