Question about :execute {pass}

First let me say that AAP is very cool stuf.  It solves many of the
problems that I have with other build systems.

I have a question about the behavior of the :execute function.  When I
use the {pass} option the execute command does not set variables that
are specified on the :execute command line.  This does work without
the {pass} option.  Is this the intended behavior or is this a bug?

When I run aap on the example below I get the following output.

> aap
-DFOO
-DBAR

> aap bad
Aap: Error in recipe "/tmp/aaptest/main.aap" line 2: NameError: name 'vary' is not defined

Any suggestions?

Thanks,
Scott Witscher
Intel Corporation


# main.aap
:variant vary
	foo
		DEFINES = -DFOO
	bar
		DEFINES = -DBAR
	*

build:
	:print $DEFINES

all:
	:execute main.aap build vary=foo
	:execute main.aap build vary=bar

bad:
	:execute {pass} main.aap build vary=foo
	:execute {pass} main.aap build vary=bar

	


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