[Bug fortran/81499] internal compiler error when compiling gfortran code with user-defined derived type i/o

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81499

Dominique d'Humieres <dominiq at lps dot ens.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2017-07-26
                 CC|                            |jvdelisle at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed. If I compile the code with an instrumented compiler, I get

ASAN:DEADLYSIGNAL
=================================================================
==6481==ERROR: AddressSanitizer: stack-overflow on address 0x7fff5bc00ff8 (pc
0x0001002be1d1 bp 0x7fff5bc01010 sp 0x7fff5bc01000 T0)
    #0 0x1002be1d0 in derived_inaccessible(gfc_symbol*)
(/opt/gcc/gcc8g/libexec/gcc/x86_64-apple-darwin16.6.0/8.0.0/f951+0x1002be1d0)
    #1 0x1002be4d3 in derived_inaccessible(gfc_symbol*)
(/opt/gcc/gcc8g/libexec/gcc/x86_64-apple-darwin16.6.0/8.0.0/f951+0x1002be4d3)
    #2 0x1002be4d3 in derived_inaccessible(gfc_symbol*)
(/opt/gcc/gcc8g/libexec/gcc/x86_64-apple-darwin16.6.0/8.0.0/f951+0x1002be4d3)
    #3 0x1002be4d3 in derived_inaccessible(gfc_symbol*)
(/opt/gcc/gcc8g/libexec/gcc/x86_64-apple-darwin16.6.0/8.0.0/f951+0x1002be4d3)
    #4 0x1002be4d3 in derived_inaccessible(gfc_symbol*)
(/opt/gcc/gcc8g/libexec/gcc/x86_64-apple-darwin16.6.0/8.0.0/f951+0x1002be4d3)
    #5 0x1002be4d3 in derived_inaccessible(gfc_symbol*)
(/opt/gcc/gcc8g/libexec/gcc/x86_64-apple-darwin16.6.0/8.0.0/f951+0x1002be4d3)
...

The code compiles and gives the expected results at run time if remove the line
(circular TYPEs)

         type (tape_type), pointer      :: ref  => null()  !  if this line is
commented out, the code will compile


Likely related to pr46244.