syntax_data: {"ast_node_type":"other","tokens":[{"end":73,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:                             if !ty.is_freeze(self.tcx, self.typing_env) {
context_before:                         Mutability::Not => {
context_after:                                 self.requires_unsafe(pat.span, BorrowOfLayoutConstrainedField);