[plt-scheme] Bug in pattern matching with failure procedures and multiple return values

[Thomas Chust]

Hello,

I ran into a problem when using failure procedures in a match expression
that was intended to return multiple values. Here is a simplified example:

% mzscheme
Welcome to MzScheme v4.1.2 [3m], Copyright (c) 2004-2008 PLT Scheme Inc.
> (match 'foo [_ (=> skip) (skip)] [_ (values 1 2)])
context expected 1 value, received 2 values: 1 2

The error only occurs if the declared failure procedure has actually
been called, which feels very much like a bug :-(

cu,
Thomas