[release/9.0] [mono] Fix crash in emit_llvmonly_handler_start #107590
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Backport of #107461 to release/9.0
/cc @lewing @radekdoulik
Customer Impact
Do not emit an llvm branch intruction when there is no target. This was never correct and in newer llvm versions it surfaces as a fatal error.
Regression
This existing error became fatal with new llvm versions.
Testing
Manual testing
Low, we avoid emitting incorrect code