linux-kernel - gcc fixed size char array initialization bug

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Message-ID: <Pine.LNX.4.60.0708022141420.6774@poirot.grange>
Date:	Thu, 2 Aug 2007 21:55:51 +0200 (CEST)
From:	Guennadi Liakhovetski <g.liakhovetski@....de>
To:	linux-kernel@...r.kernel.org
Subject: gcc fixed size char array initialization bug - known?

Hi

I've run across the following gcc "feature":

	char c[4] = "01234";

gcc emits a nice warning

warning: initializer-string for array of chars is too long

But do a

	char c[4] = "0123";

and - a wonder - no warning. No warning with gcc 3.3.2, 3.3.5, 3.4.5, 
4.1.2. I was told 4.2.x does produce a warning. Now do a

	struct {
		char c[4];
		int i;
	} t;
	t.i = 0x12345678;
	strcpy(t.c, c);

and t.i is silently corrupted. Just wanted to ask if this is known, 
really...

Thanks
Guennadi
---
Guennadi Liakhovetski
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