{"ast_node_type":"variable","tokens":[{"end":50,"kind":"keyword","start":0,"text":"let"}]}
        let slot = bx.alloca(ptr_size, ptr_align);
        let ptr_align = bx.tcx().data_layout.pointer_align().abi;
        let try_func_ty = bx.type_func(&[bx.type_ptr()], bx.type_void());