Delay the construction of early lint diag structs

Delay the construction of early lint diag structs · rust-lang/rust@37bf2d2

Original file line number	Diff line number	Diff line change
`@@ -539,7 +539,9 @@ impl EarlyContext<'_> {`
`539`	`539`	`span: MultiSpan,`
`540`	`540`	`diagnostic: BuiltinLintDiag,`
`541`	`541`	`) {`
`542`		`- diagnostics::emit_buffered_lint(self, lint, span, diagnostic)`
	`542`	`+self.opt_span_lint(lint, Some(span), \|diag\| {`
	`543`	`+ diagnostics::decorate_lint(self.sess(), diagnostic, diag);`
	`544`	`+});`
`543`	`545`	`}`
`544`	`546`	`}`
`545`	`547`