alain-heberts-macbook-pro:~ alainhebert$ gfortran -v
Using built-in specs.
Target: i386-apple-darwin8.10.1
Configured with: /tmp/gfortran-20090604/ibin/../gcc/configure
--prefix=/usr/local/gfortran --enable-languages=c,fortran
--with-gmp=/tmp/gfortran-20090604/gfortran_libs --enable-bootstrap
Thread model: posix
gcc version 4.5.0 20090604 (experimental) [trunk revision 148180] (GCC)
There is a memory leak in the latest build of gfortran. This leak is related to
the internal write operation. The bug occurs when there is no memory left (it
can be long...).
Here is the code:
character hmg1*52,hmg2*52
integer idata(13)
hmg1='1234567890123456789012345678901234567890123456789012'
read(hmg1,'(13A4)') (idata(ii),ii=1,13)
do i=1,100
do j=1,10000000
write(hmg2,'(13A4)') (idata(ii),ii=1,13)
enddo
print *,i,hmg2
enddo
print *,'everything OK'
stop
end
Here is the output:
(cut...)
21 1234567890123456789012345678901234567890123456789012
22 1234567890123456789012345678901234567890123456789012
a.out(96109) malloc: *** mmap(size=2097152) failed (error code=12)
*** error: can't allocate region
*** set a breakpoint in malloc_error_break to debug
Operating system error: Cannot allocate memory
Memory allocation failed
--
Summary: memory leak in internal write of gfortran
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Severity: critical
Priority: P3
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: alain dot hebert at polymtl dot ca
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40508
