Function parse_from_rope 

pub async fn parse_from_rope(
    rope: Rope,
    source: ResolvedVc<Box<dyn Source>>,
    ty: EcmascriptModuleAssetType,
    transforms: ResolvedVc<EcmascriptInputTransforms>,
    node_env: RcStr,
) -> Result<Vc<ParseResult>>

Re-parses a module directly from saved bytes, bypassing source.content().

Used by failsafe_parse to serve the last good AST when the live file has a syntax error.