[Ada] Crash on inherited component in type extension in generic unit.

Pierre-Marie de Rodat derodat@adacore.com
Wed Apr 28 09:41:39 GMT 2021

Compiler aborts on an instance body that has a reference to a selected
component of a local type extension, when the component is inherited
from an ancestor type declared outside of the generic being

Tested on x86_64-pc-linux-gnu, committed on trunk


	* exp_ch3.adb (Expand_Record_Extension): Set Parent_Subtype on
	the type extension when within a generic unit, even though
	expansion is disabled, to allow for proper resolution of
	selected components inherited from an ancestor.
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