https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103830

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
A fix in the source would be:

void MyClass::call() {
    volatile char * volatile null = nullptr;
    *null = 1;  /* line 26 */
}

which then compiles to

        movq    $0, -8(%rsp)
        movq    -8(%rsp), %rax
        movb    $1, (%rax)
        ret

(some "advanced" means using some asm() to hide the constant from the compiler
might also work)

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