[Bug c++/99071] [modules] ICE with initializer_list & iostream

[nathan at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99071

--- Comment #3 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
d46c7e2c546 2021-02-17 | c++: ICE with header-units [PR 99071] 

but there's now an ICE in write_defines.  (reported elsewhere too)