syntax_data: {"ast_node_type":"other","tokens":[{"end":88,"kind":"keyword","start":0,"text":"treat_err_as_bug:"}]}
source_snippet:     treat_err_as_bug: Option<NonZero<usize>> = (None, parse_treat_err_as_bug, [TRACKED],
context_before:         "generate trap instructions for unreachable intrinsics (default: use target setting, usually yes)"),
context_after:         "treat the `val`th error that occurs as bug (default if not specified: 0 - don't treat errors as bugs. \