Change how edition is determined

Author: rylev

compiler/rustc_ast_lowering/src/lib.rs

@@ -2775,7 +2775,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
             .map(|snippet| snippet.starts_with("#["))
             .unwrap_or(true);
         if !is_macro_callsite {
-            if self.sess.edition() < Edition::Edition2021 {
+            if span.edition() < Edition::Edition2021 {
                 self.resolver.lint_buffer().buffer_lint_with_diagnostic(
                     BARE_TRAIT_OBJECTS,
                     id,

compiler/rustc_lint/src/builtin.rs

@@ -1704,7 +1704,7 @@ impl EarlyLintPass for EllipsisInclusiveRangePatterns {
                     Some(start) => format!("&({}..={})", expr_to_string(&start), end),
                     None => format!("&(..={})", end),
                 };
-                if cx.sess().edition() >= Edition::Edition2021 {
+                if join.edition() >= Edition::Edition2021 {
                     let mut err =
                         rustc_errors::struct_span_err!(cx.sess, pat.span, E0783, "{}", msg,);
                     err.span_suggestion(
@@ -1728,7 +1728,7 @@ impl EarlyLintPass for EllipsisInclusiveRangePatterns {
                 }
             } else {
                 let replace = "..=".to_owned();
-                if cx.sess().edition() >= Edition::Edition2021 {
+                if join.edition() >= Edition::Edition2021 {
                     let mut err =
                         rustc_errors::struct_span_err!(cx.sess, pat.span, E0783, "{}", msg,);
                     err.span_suggestion_short(