analyzer: fix ICE on failed casts [PR 93777]
PR analyzer/93777 reports ICEs in a Fortran and C++ case involving a cast of a NULL pointer to a REFERENCE_TYPE. In both cases the call to build_cast fails and returns a NULL type, but region_model::maybe_cast_1 asserts that a non-NULL type was returned. This patch fixes the ICEs by converting the assertion to a conditional. gcc/analyzer/ChangeLog: PR analyzer/93777 * region-model.cc (region_model::maybe_cast_1): Replace assertion that build_cast returns non-NULL with a conditional, falling through to the logic which returns a new unknown value of the desired type if it fails. gcc/testsuite/ChangeLog: PR analyzer/93777 * g++.dg/analyzer/pr93777.C: New test. * gfortran.dg/analyzer/pr93777.f90: New test.
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gcc/testsuite/g++.dg/analyzer/pr93777.C
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