multiline string with """ or ''' error causes problem in groovysh

$ groovysh
Groovy Shell (1.5.4, JVM: 1.6.0_01-b06)
Type 'help' or '\h' for help.
-------------------------------------------------------------------------------
groovy:000> a = '''abc
ERROR org.codehaus.groovy.control.MultipleCompilationErrorsException: startup fa
iled, groovysh_parse: 1: expecting ''', found '<EOF>' @ line 1, column 11.
a = '''abc
^

1 error