[Bug fortran/71770] gfortran: internal compiler error: Segmentation fault (program f951)

[kargl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71770

--- Comment #4 from kargl at gcc dot gnu.org ---
(In reply to Isabelle from comment #3)
> All of this was working before I upgraded Cygwin, and tried to compile again
> ecgpuwave.

Did you read the initial error message and follow 
the direction?  This parts seems very important
(and you're possibly wasting gfortran maintainer's
time).

*** fatal error - cygheap base mismatch detected - 0x6131F408/0x6131F400.
This problem is probably due to using incompatible versions of the cygwin DLL.
Search for cygwin1.dll using the Windows Start->Find/Search facility
and delete all but the most recent version.  The most recent version *should*
reside in x:\cygwin\bin, where 'x' is the drive on which you have
installed the cygwin distribution.  Rebooting is also suggested if you
are unable to find another cygwin DLL.