Internal error when running macro that uses generator

[RyanMetcalfeInt8]

Bug description

Here is a screenshot showing the macro & internal error:

Steps to reproduce

Add macro shown in the following screenshot, and click 'Apply Macro to Project'.

Expected behavior

This macro should produce a new track filled with 30s of noise.

Actual behavior

Internal error.

Audacity Version

other

Operating system

Windows

Additional context

This is using a compiled version of Audacity, using 3.5.1 tag.

[petersampsonaudacity]

Testing on W11 with 3.5.1

The problem appears to arise due to step 1 in the macro, the creation of the new mono track.

1) Empty project

When I run this on an empty project I get this failure message:

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2) Project with existing audio

When I run it on a project that already has audio I get thie "Internal error ..." message:

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3) Macro without the mono track creation

If I remove the first Macro item that creates a new mono track then the macrro works
a) on a project with a single audio track
b) on a project with multiple audio tracks a mixture of both mono and stereo