Bug 2955. Workaround for lack of atomic operations in GCCE standard libraries (fall back to default use of Mutex)
StartDocument( documentVersion="1.0" )
Comment( text=" Unbound attribute prefix " )
Invalid( name="foo" qualifiedName="foo"
Attribute( name="attr" qualifiedName="a:attr" prefix="a" value="1" )
)
ERROR: Namespace prefix 'a' not declared