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-rw-r--r--src/libsyntax/parse/lexer/mod.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libsyntax/parse/lexer/mod.rs b/src/libsyntax/parse/lexer/mod.rs
index 0f188fdf18a..1e72b2de20f 100644
--- a/src/libsyntax/parse/lexer/mod.rs
+++ b/src/libsyntax/parse/lexer/mod.rs
@@ -849,6 +849,7 @@ impl<'a> StringReader<'a> {
           '@' => { self.bump(); return token::AT; }
           '#' => { self.bump(); return token::POUND; }
           '~' => { self.bump(); return token::TILDE; }
+          '?' => { self.bump(); return token::QUESTION; }
           ':' => {
             self.bump();
             if self.curr_is(':') {