Grammar with overlapping concrete syntax but different constructors give an error in the parse table generator

[Gohla]

Summary

Grammar with overlapping concrete syntax but different constructors give an error in the parse table generator

What you did

Create grammar with overlapping concrete syntax but different constructors, for example due to a copy-paste mistake:

Exp.And = <<Exp> and <Exp>> {left}
Exp.Or = <<Or> and <Expr>> {left}

What you expected to happen

This to work (but be ambiguous at parse time), or give an error in the SDF3 file.

What actually happened

There was an error in the parse table generator.

Context

• Spoofax version: 0.11.9
• Operating system & version: Any

Additional information

This was reported from the lab, but it should be reproduced more thoroughly.