fix consume token

Author: notJoon

compiler/rustc_parse/src/parser/expr.rs

@@ -1567,6 +1567,16 @@ impl<'a> Parser<'a> {
                     let guar = report_lit_error(&self.psess, err, token_lit, span);
                     let token_lit = token::Lit::new(token::Err(guar), token_lit.symbol, None);
                     let expr = self.mk_expr(lo.to(self.prev_token.span), ExprKind::Lit(token_lit));
+
+                    // Try to consume the next token if it looks like another string literal
+                    // This prevents cascading errors when raw strings with invalid suffixes
+                    // are immediately followed by another string
+                    if let TokenKind::Literal(lit) = &self.token.kind {
+                        if matches!(lit.kind, token::LitKind::Str | token::LitKind::StrRaw(_)) {
+                            self.bump();
+                        }
+                    }
+
                     return self.maybe_recover_from_bad_qpath(expr);
                 }
                 let expr = self.mk_expr(lo.to(self.prev_token.span), ExprKind::Lit(token_lit));

tests/ui/parser/raw-string-suffix-invalid.rs

@@ -1,8 +1,6 @@
 // Test for issue #144161: Wrong error for string literal suffix when stuck together
-// This tests the case where a raw string has an invalid suffix immediately followed by another string
 
 fn main() {
     let s = r#" \\ "#r"\\ ";
     //~^ ERROR suffixes on string literals are invalid
-    //~| ERROR expected one of `.`, `;`, `?`, `else`, or an operator
 }

tests/ui/parser/raw-string-suffix-invalid.stderr

@@ -1,14 +1,8 @@
 error: suffixes on string literals are invalid
-  --> $DIR/raw-string-suffix-invalid.rs:5:13
+  --> $DIR/raw-string-suffix-invalid.rs:4:13
    |
 LL |     let s = r#" \ "#r"\ ";
    |             ^^^^^^^^^^ invalid suffix `r`
 
-error: expected one of `.`, `;`, `?`, `else`, or an operator, found `"\ "`
-  --> $DIR/raw-string-suffix-invalid.rs:5:23
-   |
-LL |     let s = r#" \ "#r"\ ";
-   |                       ^^^^^ expected one of `.`, `;`, `?`, `else`, or an operator
-
-error: aborting due to 2 previous errors
+error: aborting due to 1 previous error