gfc_array_range_type being garbage collected?

[Andrew Pinski]

> 
> Hi,
> 
> I've come across a strange bug while preparing the Cray pointer patch 
> for release.  In a large test program, I get an ICE due to 
> gfc_array_range_type being overwritten prior to being used in 
> gfc_get_array_type_bounds.  This only happens with a sufficiently 
> large program, and it appears that gfc_array_range_type is being 
> garbage collected:
> 
> Hardware watchpoint 6: *1073909760
> (gdb) cont
>   MAIN__ loctest ptrparms pteparm1 ptr1 ptr2 ptr3 ptr4 ptr5 ptr6 {GC 
> 5429k -> Hardware watchpoint 6: *1073909760
> 
> Old value = 0
> New value = -1515870811
> 0x001d9c77 in memset () from /lib/tls/libc.so.6
> 
> This happens while translating a Cray pointee, but I don't think it's 
> related; the same subroutine compiles and runs fine in a smaller 
> program.  Does anybody have an idea what could be happening?

One more thing, if you sent you current patch to me and your testcase,
I might be able to help you to find why the GC is freeing the type.

Thanks,
Andrew Pinski