JSON destructuring causes stack overflow in compiler

[sgrove]

Thank you for filing! Check list:

• Is it a bug? Usage questions should often be asked in the forum instead.
• Concise, focused, friendly issue title & description.
• A minimal, reproducible example.

Here's a relative small example (one type, one function with one/two-nested switch) that won't compile

If you delete any top-level switch branch from ^, it'll compile without the stack overflow/hanging issue, albeit it may be quite slow.

Here's an example of one branch deleted and compiling, albeit very slowly and using a lot of CPU