Internal Compiler Error using group transform

[richb-hanover]

What happened?

I was building a query and found that commenting out a line within a group transform's pipeline caused a compiler error.

• If both transforms are present (sort and take) in the query below, the compiler works
• If only the take is present (commenting out the sort) the compiler works
• If only the sort is present, the compiler's error refers to Compiler Panic with group transforms #3870

This error might be related to other issues, but I figured I should note it here.

PRQL input

from a=TableA

group { a.Col1 } (
    sort a.Col2 
    take 1
)

SQL output

N/A

Expected SQL output

N/A

MVCE confirmation

• Minimal example
• New issue

Anything else?

No response

[richb-hanover]

PS PRQL remains ever-useful. I still get a lot of mileage from it, despite these hurdles. Thanks!