syntax_data: {"ast_node_type":"other","tokens":[{"end":44,"kind":"keyword","start":0,"text":"ptr.valid_range_mut().start"}]}
source_snippet:             ptr.valid_range_mut().start = 1;
context_before:             let mut ptr = scalar_unit(Pointer(dl.instruction_address_space));
context_after:             tcx.mk_layout(LayoutData::scalar(cx, ptr))