--- Comment #4 from joseph at codesourcery dot com <joseph at codesourcery dot 
com> ---
On Fri, 9 Feb 2018, rguenth at gcc dot wrote:

> The fix is to place a DECL_EXPR somewhere by the FE.  We have some duplicates
> with similar issues.

Should c_fully_fold_internal then generate something involving a DECL_EXPR 
for C_MAYBE_CONST_EXPR, instead of just a COMPOUND_EXPR?  (In the general 
case where the size expression has side effects, it must be evaluated at 
that exact point in the expression, if and only if that point is reached 
in evaluation.)

(MOVED = bug filed in a different bug tracker for a different project.  
That's for e.g. something that's actually a binutils or glibc bug; I don't 
see how it applies here.)

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