Auto merge of #41987 - Mark-Simulacrum:rollup, r=Mark-Simulacrum

Rollup of 7 pull requests

- Successful merges: #41612, #41826, #41939, #41946, #41950, #41975, #41979
- Failed merges:

1 files changed, 1 insertions, 3 deletions

diff --git a/src/libsyntax/parse/lexer/mod.rs b/src/libsyntax/parse/lexer/mod.rs
index ded1f0b599a..a83b19c7334 100644
--- a/src/libsyntax/parse/lexer/mod.rs
+++ b/src/libsyntax/parse/lexer/mod.rs
@@ -754,9 +754,7 @@ impl<'a> StringReader<'a> {
         // integer literal followed by field/method access or a range pattern
         // (`0..2` and `12.foo()`)
         if self.ch_is('.') && !self.nextch_is('.') &&
-           !self.nextch()
-                .unwrap_or('\0')
-                .is_xid_start() {
+           !ident_start(self.nextch()) {
             // might have stuff after the ., and if it does, it needs to start
             // with a number
             self.bump();