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b0e249afc6
Print_Node_Ref, which is called by pp, sometimes calls Compile_Time_Known_Value, which blows up if Entity (N) is empty. Rearrange the tests here, and test for Present (Entity (N)) before calling Compile_Time_Known_Value. Remove test "Nkind (N) in N_Subexpr", which is redundant with other tests. We don't want to make Compile_Time_Known_Value more robust; you shouldn't call it on half-baked nodes. But ideally pp should be able to print such nodes. This change fixes one of many such cases. gcc/ada/ChangeLog: * treepr.adb (Print_Node_Ref): Protect against Entity (N) being empty before calling Compile_Time_Known_Value.
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