Reproduction steps:
1. Open the attached “CrashRepro” project
2. Click “CloseButton” whenever “Error - Unity Version Control” modal opens

Expected results: Project opens
Actual results: Editor crashes

Reproduced with: 6000.0.0b16, 6000.0.3f1
Not reproduced with: 6000.0.0b15
Couldn’t test with: 2022.3.29f1 (Project gets stuck when opening)

Reproduced on: Ubuntu 24.04
Not reproduced on: Windows 10

First lines of the stack trace:
#0 0x0063ee156aa08c in burst_signal_handler(int, siginfo_t, void)
#1 0x00711193c45320 in (Unknown)
#2 0x0063ee158c0fcf in ShaderLab::Program::AddVariantParameters()
#3 0x0063ee167bed6b in FinalizeVariant(SingleVariantCompileJobData*, bool)
#4 0x0063ee167bd735 in UpdateAsyncShaderVariants()
#5 0x0063ee14f8bfea in CallbackArray::Invoke()