def mark_try_block(typingctx):
    """An intrinsic to mark the start of a *try* block.
    """
    def codegen(context, builder, signature, args):
        nrt = context.nrt
        nrt.eh_try(builder)
        return context.get_dummy_value()

    restype = types.none
    return restype(), codegen
An intrinsic to mark the start of a *try* block.
    
numba/core/unsafe/eh.py