[Bug fortran/78618] ICE in gfc_check_rank, at fortran/check.c:3670

[sgk at troutmask dot apl.washington.edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78618

--- Comment #10 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Sat, Dec 03, 2016 at 07:31:21AM +0000, janus at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78618
> 
> --- Comment #9 from janus at gcc dot gnu.org ---
> (In reply to Steve Kargl from comment #8)
> > Note, I configured gcc with 
> > 
> > ../gcc7/configure  \
> > --prefix=$HOME/work/7 --with-isl=/usr/local \
> > --enable-languages=c,fortran,c++ --enable-libsanitizer \
> > --disable-libmudflap --disable-nls
> 
> I'm configuring with
> 
> --program-suffix=-7 --build=x86_64-linux-gnu --host=x86_64-linux-gnu
> --target=x86_64-linux-gnu --with-arch=haswell --prefix=/us
> r --libdir=/usr/lib --libexecdir=/usr/lib --enable-languages=c,c++,fortran
> --disable-bootstrap --disable-multilib
> 
> I admit that's not a full bootstrap, but I see things working on two different
> machines. The testsuite is clean and compiling the test case by hand works as
> well.
> 

Others are see the failures.

https://gcc.gnu.org/ml/gcc-testresults/2016-12/msg00313.html
https://gcc.gnu.org/ml/gcc-testresults/2016-12/msg00311.html

I think your patch is correct, but uncovering a new latent bug.
Does your memory allocator fill freed memory with junk?  This
looks like a used-after-freed bug.