MacOS crash not appearing in bugsplat

[AtlasLinden]

Environment

Second Life Project Gltf Mesh Import 7.1.14.15976006598

Description

As mentioned in #4315, this crash does not appear in bugsplat.
Separate to #4319 as crash handling is OS specific

Reproduction steps

Reproduce crash in #4315
Or use the new and upcoming "force crash" menu item being added to a future viewer near you! Develop->Force an Error

[AtlasLinden]

See similar issue: #4206

[akleshchev]

Added threads into rethrow logic for MAC OS to handle this crash.

P.S. Windows catches structured exception and immediately reports to bugsplat. Mac can't do that so have to rethrow exception at main thread and unfortunately rethrow is likely to be mangling callstack.

[AtlasLinden]

Two new force an error options have been added.

• "Force an LLError Crash in a Thread" crashes the viewer on mac and appears successfully in Bugsplat.
• "Force an Exception Crash in a Thread" does not appear to crash the viewer on mac.

After discussion with Caladbolg, this is enough to fail this issue but is no longer considered a blocker
Failed QA on Second Life Release 7.2.0.16356654553 (2025.05)
Priority changed from Critical to High