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[Ada] Spurious End_Error with Get_Line on strings without line terminators

From: Arnaud Charlet <charlet at adacore dot com>
To: gcc-patches at gcc dot gnu dot org
Cc: Ed Schonberg <schonberg at adacore dot com>
Date: Wed, 27 Apr 2016 08:31:07 -0400
Subject: [Ada] Spurious End_Error with Get_Line on strings without line terminators
Authentication-results: sourceware.org; auth=none

This patch fixes a spurious End_Error raised by Text_IO.Get_Line, when the
input line has 499 or 500 characters and does not contain a line terminator.

No short example available.

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

2016-04-27  Ed Schonberg  <schonberg@adacore.com>

	* a-textio.adb (Get_Line function): Handle properly the case of
	a line that has the same length as the buffer (or a multiple
	thereof) and there is no line terminator.
	* a-tigeli.adb (Get_Line procedure): Do not store an end_of_file
	in the string when there is no previous line terminator and we
	need at most one additional character.

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