"web mvc finder all" generates code with syntax error for "IsNull/IsNotNull" finders

project --topLevelPackage com.acme.foo
jpa setup --provider HIBERNATE --database HYPERSONIC_IN_MEMORY

entity jpa --class ~.Foo
field string --fieldName bar
finder add --finderName findFoosByBarIsNull

web mvc setup
web mvc all --package ~.web

web mvc finder all

[ERROR] Failed to execute goal org.codehaus.mojo:aspectj-maven-plugin:1.4:compile (default) on project foo: Compiler errors:
[ERROR] error at uiModel.addAttribute("foos", Foo.findFoosByBarIsNull(, sortFieldName, sortOrder).setFirstResult(firstResult).setMaxResults(sizeNo).getResultList());
[ERROR]
[ERROR] /root/acme/src/main/java/com/acme/foo/web/FooController_Roo_Controller_Finder.aj:25:0::0 Syntax error on token ",", delete this token
[ERROR] error at uiModel.addAttribute("foos", Foo.findFoosByBarIsNull(, sortFieldName, sortOrder).getResultList());
[ERROR]
[ERROR] /root/acme/src/main/java/com/acme/foo/web/FooController_Roo_Controller_Finder.aj:29:0::0 Syntax error on token ",", delete this token