https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103524 Bug 103524 depends on bug 110417, which changed state.
Bug 110417 Summary: [modules] Segfault compiling iostream as header unit on FreeBSD https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110417 What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |DUPLICATE