[Bug fortran/78958] New: FAIL: gfortran.dg/alloc_comp_class_5.f03 - Segmentation fault

[danglin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78958

            Bug ID: 78958
           Summary: FAIL: gfortran.dg/alloc_comp_class_5.f03 -
                    Segmentation fault
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: danglin at gcc dot gnu.org
  Target Milestone: ---
              Host: hppa64-hp-hpux11.11
            Target: hppa64-hp-hpux11.11
             Build: hppa64-hp-hpux11.11

spawn /test/gnu/gcc/objdir/gcc/testsuite/gfortran/../../gfortran
-B/test/gnu/gcc
/objdir/gcc/testsuite/gfortran/../../
-B/test/gnu/gcc/objdir/hppa64-hp-hpux11.11
/./libgfortran/
/test/gnu/gcc/gcc/gcc/testsuite/gfortran.dg/alloc_comp_class_5.f
03 -fno-diagnostics-show-caret -fdiagnostics-color=never -O0 -pedantic-errors
-B
/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/./libgfortran/.libs
-L/test/gnu/gcc/obj
dir/hppa64-hp-hpux11.11/./libgfortran/.libs
-L/test/gnu/gcc/objdir/hppa64-hp-hpu
x11.11/./libgfortran/.libs
-L/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/./libatomic/.libs
-B/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/./libquadmath/.libs
-L/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/./libquadmath/.libs
-L/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/./libquadmath/.libs -lm -o
./alloc_comp_class_5.exePASS: gfortran.dg/alloc_comp_class_5.f03   -O0  (test
for excess errors)Setting LD_LIBRARY_PATH to
.:/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/./libgfortran/.libs:/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/./libgfortran/.libs:/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/./libatomic/.libs:/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/./libquadmath/.libs:/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/./libquadmath/.libs:/test/gnu/gcc/objdir/gcc:.:/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/./libgfortran/.libs:/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/./libgfortran/.libs
:/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/./libatomic/.libs:/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/./libquadmath/.libs:/test/gnu/gcc/objdir/hppa64-hp-hpux11.11/./libquadmath/.libs:/test/gnu/gcc/objdir/gccspawn
[open ...]Program received signal SIGSEGV: Segmentation fault - invalid memory
reference.

(gdb) r
The program being debugged has been started already.
Start it from the beginning? (y or n) y
Starting program:
/test/gnu/gcc/objdir/gcc/testsuite/gfortran/alloc_comp_class_5.exe 

Program received signal SIGSEGV, Segmentation fault.
0x800003fffdd7d264 in ?? () from /lib/pa20_64/libc.2
(gdb) bt
#0  0x800003fffdd7d264 in ?? () from /lib/pa20_64/libc.2
#1  0x800003fffdd7ff38 in free () from /lib/pa20_64/libc.2
#2  0x4000000000006018 in array_list::add_item (
    a=<error reading variable: Cannot access memory at address 0x148>, 
    e=<error reading variable: Cannot access memory at address 0x150>)
    at /test/gnu/gcc/gcc/gcc/testsuite/gfortran.dg/alloc_comp_class_5.f03:28

Breakpoint 2, 0x800003fffdd7fc08 in free () from /lib/pa20_64/libc.2
(gdb) bt
#0  0x800003fffdd7fc08 in free () from /lib/pa20_64/libc.2
#1  0x4000000000006018 in array_list::add_item (
    a=<error reading variable: Cannot access memory at address 0x3>, 
    e=<error reading variable: Cannot access memory at address 0xb>)
    at /test/gnu/gcc/gcc/gcc/testsuite/gfortran.dg/alloc_comp_class_5.f03:28
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
(gdb) p/x $r26
$3 = 0x800000010000b280

It looks like this address wasn't allocated or previously freed.