19.2 Limitations
There are some problems with the error checking of the compiler
package. The interpreter detects syntax errors in two distinct
phases. One set of errors is detected by the interpreter's parser,
the other set by the compiler. The compiler package relies on the
interpreter's parser, so it get the first phases of error checking for
free. It implements the second phase itself, and that implementation is
incomplete. For example, the compiler package does not raise an error
if a name appears more than once in an argument list:
def f(x, x): ...
A future version of the compiler should fix these problems.
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Release 2.4, documentation updated on 29 November 2004.