https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124477

Nathaniel Shead <nshead at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |nshead at gcc dot gnu.org

--- Comment #1 from Nathaniel Shead <nshead at gcc dot gnu.org> ---
Thanks for the report!  I haven't been able to reproduce locally, I wonder if
maybe it's a libc difference.  Would you mind attaching maybe the result also
of the working version with '#include <cstring>'?

Alternatively, does the following simplified std module also ICE for you
similarly?  And if so could you send the preprocessed source for a.cpp?

  // a.cpp
  module;
  #include <cstring>
  export module M;
  export using ::memset;

  // b.cpp
  import M;
  void foo(void* data) {
    memset(data, 0xFF, 4);
  }

  # copy optimisation flags from above as needed to reproduce
$ g++ -fmodules -S -O3 #etc# a.cpp b.cpp

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