http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53521
Bug #: 53521 Summary: Memory leak with zero sized array constructor Classification: Unclassified Product: gcc Version: 4.6.3 Status: UNCONFIRMED Severity: normal Priority: P3 Component: fortran AssignedTo: unassig...@gcc.gnu.org ReportedBy: joost.vandevond...@mat.ethz.ch The following testcase (as reduced from CP2K) leaks memory when compiled with gfortran 4.6 - 4.8 : MODULE TEST IMPLICIT NONE CONTAINS SUBROUTINE T(n1) INTEGER :: n1(:) END SUBROUTINE T SUBROUTINE T2(n) INTEGER :: n INTEGER :: k CALL T((/(k,k=1,n-1)/)) END SUBROUTINE END MODULE USE TEST CALL T2(1) END as can be verified with valgrind or putting a loop around call t2. The issue seems to be the zero-sized array constructor.