Rascal debugger cannot handle common keyword parameters

[PieterOlivier]

When a Rascal program uses common keyword parameters in a data definition, the debugger will always stop on the line containing the common parameters when code is executed where an actual parameter is used (which does not have to be a common parameter).

When this occurs the stack shown in VSCode is messed up, containing only a kwp initializer frame.

To reproduce, run the following code in the debugger:

module bug::CommonKeyword

data Person(str name="");

data Person = person(int age=42);

void trigger() {
    p = person();
    _ = p.age;
}

The debugger will break on the data Person(str name=""); line and the stack will be messed up.