[Bug tree-optimization/101977] [12 Regression] array subscript 0 is outside array bounds

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101977
Bug 101977 depends on bug 101600, which changed state.

Bug 101600 Summary: [12 Regression] Spurious -Warray-bounds downcasting a polymorphic pointer
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101600

           What    |Removed                     |Added
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             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED