[llvm-bugs] [Bug 45477] New: compile-time core dump building input_head.f from LS3DF

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=45477

            Bug ID: 45477
           Summary: compile-time core dump building input_head.f from
                    LS3DF
           Product: flang
           Version: trunk
          Hardware: Macintosh
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Frontend
          Assignee: unassignedbugs at nondot.org
          Reporter: naromero at anl.gov
                CC: David.Truby at arm.com, llvm-bugs at lists.llvm.org,
                    sscalpone at nvidia.com

Created attachment 23330
  --> https://bugs.llvm.org/attachment.cgi?id=23330&action=edit
LS3DF source code that causes f18 to core dump.

The source file is from a DOE science code:
flang -O2  -Mfixed -c input_head.f

f18 core dumps during the compile phase. When I run gdb on the core, this is
what I see:
Core was generated by
`/scratch/naromero/opt/spack/linux-ubuntu18.04-westmere/gcc-7.4.0/f18-master-lom'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x0000563a09c85880 in
Fortran::semantics::IoChecker::Enter(Fortran::parser::InputItem const&) ()

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