Jakub Jelinek <jakub at gcc dot> changed:

           What    |Removed                     |Added
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |jakub at gcc dot
         Resolution|---                         |INVALID

--- Comment #1 from Jakub Jelinek <jakub at gcc dot> ---
That testcase is invalid C, -fsanitize=undefined would even tell you.
__int128 requires 16-byte alignment and you're violating that.
You can use __int128 temp; memcpy (&temp, abc, sizeof (temp)); ... use temp ...
or __int128 in a __attribute__((packed)) structure etc. to read unaligned

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