Re: [PATCH] [RFC] fts: avoid reading beyond the heap allocation

[Paul Eggert]

Although the Gnulib code workaround is fine, surely it's a bug in GCC 5.1.1, not 
a bug in Gnulib.  I don't see anywhere in the C standard that requires a program 
to allocate a flexible array size that's rounded to the alignment of the 
containing structure.  Any implicit read is OK, so long as the underlying 
runtime guarantees alignment of the requested size, which any sane runtime will 
do.  So I suggest filing a bug report with the GCC folks and mentioning the bug 
number in a comment in lib/fts.c.