I get an Segmentation Fault with the Macintosh gfortran from the 20050213 package for this program.
[dranta:~/tests/gfortran] dir% gfortran -c plotz.f [address=6f6c0004 pc=000140d0] plotz.f: In function 'plotz': plotz.f:1: internal compiler error: Segmentation Fault Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://gcc.gnu.org/bugs.html> for instructions. [dranta:~/tests/gfortran] dir% cat plotz.f SUBROUTINE PLOTZ IMPLICIT DOUBLE PRECISION (A-H,O-Z) COMMON /HEAD/ HED,P(3) CHARACTER HED*80,P*1 COMMON /ULAB/ LAB(5) CHARACTER*80 LAB COMMON /IODATA/ DATA(64) COMMON /TAPES/ NOUT,NTAPE2,NTAPE3,NTAPE4,NTAPE5,NTAPE6,NTAPE7, $ NTAPE8,NTAPE9 COMMON /CCPOOL/ RMIN,RMAX,ZMIN,ZMAX,IMIN,JMIN,IMAX,JMAX,NFLOP, $ HTP,SCALEP,ANGP,CCXMAX,WIDTH C RETURN END -- Summary: internal compiler error: Segmentation Fault - For common blocks Product: gcc Version: 4.0.0 Status: UNCONFIRMED Severity: normal Priority: P2 Component: fortran AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: dir at lanl dot gov CC: gcc-bugs at gcc dot gnu dot org GCC host triplet: powerpc-apple-darwin7.8.0 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20059