In message 1266111217.22489.794115@goedel.fjf.gnu.de, Frank Heckenbach ih8mj@fjf.gnu.de writes
You can disable the run-time checks (--no-range-checking), but of course, these might indicate actual bugs in the code ... :-)
Thanks but I am well aware of that; the main point of going to the newer compiler was to track down some obscure bugs (and we are slowly achieving it). Unfortunately the range checking is also catching lots of other slightly sloppy but harmless code that has crept in since we last used a compiler with range checking capability.