Issue 1022 in robotframework: Setting non-string message to tests with `BuiltIn.Set Test Message` keyword crashes execution

[robotframework]

Status: Accepted
Owner: pekka.klarck
Labels: Type-Defect Priority-Medium Target-2.7
New issue 1022 by pekka.klarck: Setting non-string message to tests with  
`BuiltIn.Set Test Message` keyword crashes execution
http://code.google.com/p/robotframework/issues/detail?id=1022

To reproduce:

    *** Test Cases ***
    Example
        Set Test Message    ${42}


Using something else than a string as a message can be considered a user  
error, but totally crashing the execution is severe enough to consider this  
medium priority bug.