Summarize and direct groupby field access result in runtime error or hang

[gregli-msft]

This trivial case is reduced from a much bigger example.

Summarize( [{Value:1,Sixteen:1}], Sixteen, Dec2Hex( Sixteen, 3 ) As LevelOne )

results in runtime errors in the column LevelOne, while this does not:

Summarize( [{Value:1,Sixteen:1}], Sixteen, Dec2Hex( First(ThisGroup).Sixteen, 3 ) As LevelOne )

Using Text instead of Dec2Hex results in a hang in the REPL.

It may be thinking that Sixteen is a table?

[anderson-joyle]

Power-Fx/src/libraries/Microsoft.PowerFx.Interpreter/Functions/LibraryTable.cs

Line 1436 in 19e7538

var result = (InMemoryRecordValue)(await arg.EvalInRowScopeAsync(context.NewScope(childContext)).ConfigureAwait(false));