https://bugs.llvm.org/show_bug.cgi?id=50735
Allen zhong <[email protected]> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|INVALID |---
Status|RESOLVED |REOPENED
--- Comment #5 from Allen zhong <[email protected]> ---
I reopen it as it is undefined behavior, see detail in the link
https://isocpp.org/wiki/faq/const-correctness#mutable-data-members
Please don't write saying version X of compiler Y on machine Z lets you change
a non-mutable member of a const object. I don’t care - it is illegal according
to the language and your code will probably fail on a different compiler or
even a different version (an upgrade) of the same compiler. Just say no. Use
mutable instead. Write code that is guaranteed to work, not code that doesn't
seem to break
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