gfortran memory leakage

[MATcalc_Sysadmin]

Hello,

We found a quite strange behaviour of the gfortran 4.5.3 for
the following five examples. The first one shows heavily
increasing memomry consuption over runtime.
The error happens during the read command.

The other 4 exmples are okay.

1. example

      program test1
      character*200 test
      REAL*8 vout
      test='NH'
   10 continue
      read (test,*,end=20,err=22) vout
   22 continue
      write(*,*) vout,"  error"
      goto 10
   20 continue
      write(*,*) vout
      goto 10
      end

#output:      6.90740463938966731E-310  .....
#heavily increasing memory

2. example

      program test1
      character*200 test
      integer vout
      test='NH'
   10 continue
      read (test,*,end=20,err=22) vout
   22 continue
      write(*,*) vout,"  error"
      goto 10
   20 continue
      write(*,*) vout
      goto 10
      end

#output: 32750 error ....

3. example

      program test1
      character*200 test
      integer vout
      test='2'
   10 continue
      read (test,*,end=20,err=22) vout
   22 continue
      write(*,*) vout,"  error"
      goto 10
   20 continue
      write(*,*) vout
      goto 10
      end
#output: 2  .....
#memory okay

4. example

      program test1
      character*200 test
      REAL*8 vout
      test='2'
   10 continue
      read (test,*,end=20,err=22) vout
   22 continue
*      write(*,*) vout,"  error"
      goto 10
   20 continue
      write(*,*) vout
      goto 10
      end2.0000000000000000

#output:  2.0000000000000000      .....
#memory okay

5. example

      program test1
      character*200 test
      REAL*8 vout
      test='NH'  10 continue
      read (test,'(F6.4)',end=20,err=22) vout
   22 continue
      write(*,*) vout,"  error"
      goto 10
   20 continue
      write(*,*) vout
      goto 10
      end

#output:      6.94129341886360735E-310   .....
#memory okay

The system is x86_64 running gentoo.

The results didnt change for different libc, gcc versions and also
for different compiler flags.

Can anyone please help? Many thanks!

--
Plänitz
www.matcalc.de