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[Ada] Spurious error on container "of" loop

From: Arnaud Charlet <charlet at adacore dot com>
To: gcc-patches at gcc dot gnu dot org
Cc: Hristian Kirtchev <kirtchev at adacore dot com>
Date: Mon, 2 May 2016 05:23:56 -0400
Subject: [Ada] Spurious error on container "of" loop
Authentication-results: sourceware.org; auth=none

This patch modifies the implementation of container indexing to inspect the
base type of the container in case the container is a subtype. No
simple reproducer found.

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

2016-05-02  Hristian Kirtchev  <kirtchev@adacore.com>

	* sem_ch4.adb (Find_Indexing_Operations): Use the underlying type
	of the container base type in case the container is a subtype.
	* sem_ch5.adb (Analyze_Iterator_Specification): Ensure that
	the selector has an entity when checking for a component of a
	mutable object.

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