https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81411
Bug ID: 81411 Summary: intrinsic polymorphic assignment run time error Product: gcc Version: 7.1.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: fortran Assignee: unassigned at gcc dot gnu.org Reporter: ian at rhymneyconsulting dot co.uk Target Milestone: --- Created attachment 41731 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41731&action=edit This is the total set of files. I get the following error at run time c:\document\fortran\fourth_edition\examples>ch2806_gfortran.exe calling display subroutine Program received signal SIGSEGV: Segmentation fault - invalid memory reference. Backtrace for this error: #0 0xffffffff #1 0xffffffff #2 0xffffffff #3 0xffffffff #4 0xffffffff #5 0xffffffff #6 0xffffffff #7 0xffffffff #8 0xffffffff #9 0xffffffff #10 0xffffffff #11 0xffffffff #12 0xffffffff #13 0xffffffff #14 0xffffffff