Statistics on pathmap.py
------------------------

Solo verified by Shipman using trace tables: see pathmap.vrf for
the trace tables themselves.

Program size: 63/224 code lines, 28% non-blank non-comment lines.

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Syntax errors
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S1  Forgot the `self' argument in the PathMap() class constructor.
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S2  Neglected to import log module.
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S3  In PathMap.__readPathLine(), the precompiled pattern
    `linePat' is not in the global name space; it is in the
    object's namespace.  So this line:
        m  =  scan.tabReMatch ( linePat )
    becomes:
        m  =  scan.tabReMatch ( self.linePat )
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Bugs that would be caught in a more strongly-typed language
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T1

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Logic bugs
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B1