Walking a contexts parent's inside Recover to build error messages

[The-Futurist]

I'm starting to explore the antlr error strategy stuff for the first time, While digging into this I stumbled upon the idea of looking at the recognizer.Context.Parent chain to shed light on what parser rule(s) the parser was in, when it gives up.

This seem like a sensible idea for example with a malformed if conditional expression I see this in my case:

ExpressionContext
→ ExprBinaryContext
→ ThenContext
→ IfContext
→ StatementContext

So can see it gave up while parsing an expression within an if. I can envisage generalizing this in such a way I can produce very specific error messages can be generated for a whole variety of cases.

Invalid expression encountered within the if statement beginning on line 27 for example.

My question - is this a bad idea? are there pitfalls?