indent breaks C code !

Package: indent
Version: 2.2.10-1
Severity: important


Hi,

when feeding this line:

	a += - -1;

indent transforms it to:

	a += --1;

which hasn't the same meaning at all (instead of a unary minus on a negative constant, it's a predecrementation of a constant) and in this example isn't even legal C code.

It's quite a serious issue.

Thanks,
	Xav

-- System Information:
Debian Release: squeeze/sid
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  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: i386 (i686)

Kernel: Linux 2.6.29-2-686 (SMP w/4 CPU cores)
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Shell: /bin/sh linked to /bin/bash

Versions of packages indent depends on:
ii  libc6                         2.9-10     GNU C Library: Shared libraries

indent recommends no packages.

indent suggests no packages.

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