Slicing Hangs with Tree Support even though not needed.

[snafu76]

Cura Version

5.7.0 alpha

Operating System

Windows 11

Printer

Ender 3 Max/Marlin 2.7

Reproduction steps

Exported design directly from Fusion 360 into Cura 5.7.0 alpha. (Running beta due unexpected slicing errors with 5.6.0.) Support option with Tree Support from Everywhere was already selected even though not required for this design.
Started slicing process.
Process hung after a couple seconds at about 25% - waited several minutes for it continue but nothing changed.
Cancelled slicing and tried again - same results.

Actual results

Turning off Support or changing to use Tree Support only touching Build Plate worked. Changed support back to Tree/Everywhere and slicing hangs consistently.

Expected results

Works with other versions of Cura, including 5.6.0.

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Bug_Report.zip

[Asterchades]

This is, unfortunately, expected at the moment. The good news is that patches have already been made which should correct the issue in the next build of 5.7.

See PR 2028 for the actual fix itself.