syntax_data: {"ast_node_type":"other","tokens":[{"end":108,"kind":"keyword","start":0,"text":"instrument_coverage:"}]}
source_snippet:     instrument_coverage: InstrumentCoverage = (InstrumentCoverage::No, parse_instrument_coverage, [TRACKED],
context_before:     #[rustc_lint_opt_deny_field_access("use `Session::instrument_coverage` instead of this field")]
context_after:         "instrument the generated code to support LLVM source-based code coverage reports \