I have not really debugged the program, but it compilers & runs with NAG f95, g95 and ifort - and with gfortran 4.2. It fails with gfortran 4.3, 4.4 and 4.5. (It does not compile with 4.1 due to allocatable compounds.)
Reported by Armelius Cameron at http://gcc.gnu.org/ml/fortran/2010-01/msg00082.html It segfaults here with 4.5 and only gives a bogus error with -fcheck-bounds in 4.3/4.4; however, the modified version (attached) crashes with 4.3/4.4/4.5. -- Summary: [4.3/4.4/4.5 Regression] Wrong-code with allocatable compounds Product: gcc Version: 4.5.0 Status: UNCONFIRMED Keywords: wrong-code Severity: normal Priority: P3 Component: fortran AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: burnus at gcc dot gnu dot org OtherBugsDependingO 42361 nThis: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42736