On 1/24/19 2:16 PM, Marek Polacek wrote:
This test ICEs since r159006 which addedtype = ENUM_UNDERLYING_TYPE (type); to type_promotes_to. In this test ENUM_UNDERLYING_TYPE is null because we haven't yet parsed '}' of the enum and the underlying type isn't fixed, and so checking TYPE_UNSIGNED crashed. I've added some checks to the test to see if the types seem to be OK; clang++ agrees. Bootstrapped/regtested on x86_64-linux, ok for trunk/8/7? 2019-01-24 Marek Polacek <pola...@redhat.com> PR c++/89024 - ICE with incomplete enum type. * cvt.c (type_promotes_to): Check if prom is non-null.
9.6/6: An enumeration whose underlying type is not fixed is an incomplete type from its point of declaration to immediately after the closing } of its enum-specifier, at which point it becomes a complete type.
So the conversion is ill-formed. Jason
