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From: "peng.wang@compiler-dev.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/95718] New: Wrong pointer associated status without
 initialization
Date: Wed, 17 Jun 2020 09:04:17 +0000
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X-Bugzilla-Version: 10.1.0
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95718

            Bug ID: 95718
           Summary: Wrong pointer associated status without initialization
           Product: gcc
           Version: 10.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: peng.wang@compiler-dev.com
  Target Milestone: ---

consider the code below:

****
program test
integer,pointer::ptr
integer,pointer::ptr1
integer,pointer::ptr2
integer,pointer::ptr3
integer,pointer::ptr4

print*,associated(ptr),'associated(ptr)'
print*,associated(ptr1),'associated(ptr1)'
print*,associated(ptr2),'associated(ptr2)'
print*,associated(ptr3),'associated(ptr3)'
print*,associated(ptr4),'associated(ptr4)'
end program test
****

#gfortran -std=3Df2008 test.f90 ; ./a.out
 T associated(ptr)
 F associated(ptr1)
 T associated(ptr2)
 F associated(ptr3)
 T associated(ptr4)

the associated status of the pointers is uncertain after the execution abov=
e.

according to F2008 draft 16.5.2.7, the associated status of the pointer sho=
uld
be F in the case above.

this is the options given when GCC was configured:
# gfortran -v
Using built-in specs.
COLLECT_GCC=3Dgfortran
COLLECT_LTO_WRAPPER=3D/usr/local/gcc/libexec/gcc/x86_64-pc-linux-gnu/10.1.0=
/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../configure --prefix=3D/usr/local/gcc -enable-checking=3D=
release
-enable-languages=3Dc,fortran -disable-bootstrap -disable-multilib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 10.1.0 (GCC)=