[Bug fortran/51972] New: [OOP] ALLOCATE misses memset/calloc, causing segfault

["burnus at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51972

             Bug #: 51972
           Summary: [OOP] ALLOCATE misses memset/calloc, causing segfault
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: burnus@gcc.gnu.org


Created attachment 26435
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26435
Test case

The test case is a reduced version of chapter07/strategy_surrogate_f2003,
available from http://www.cambridge.org/rouson under "Resources available".

When compiling and running the program, one might get:
  Program received signal SIGABRT: Process abort signal.

Backtrace for this error:
  #6  0x400AC5 in __lorenz_module_MOD___copy_lorenz_module_Lorenz at
test.F90:42
  #7  0x401392 in __runge_kutta_2nd_module_MOD_integrate at test.F90:73
  #8  0x40153F in MAIN__ at test.F90:84


And with valgrind:
  Conditional jump or move depends on uninitialised value(s)
  at 0x400AD8: __lorenz_module_MOD___copy_lorenz_module_Lorenz (test.F90:42)
  by 0x4013B2: __runge_kutta_2nd_module_MOD_integrate (test.F90:73)


The issue is that there is MEMSET or CALLOC missing in "integrate". There is a
call to memset in "constructor" and "assign_lorenz".