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-rw-r--r--src/libsyntax_ext/format.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libsyntax_ext/format.rs b/src/libsyntax_ext/format.rs
index 61722ba5516..3e3bca7080f 100644
--- a/src/libsyntax_ext/format.rs
+++ b/src/libsyntax_ext/format.rs
@@ -159,7 +159,7 @@ fn parse_args<'a>(
             };
             let name: &str = &ident.as_str();
 
-            p.expect(&token::Eq).unwrap();
+            p.expect(&token::Eq)?;
             let e = p.parse_expr()?;
             if let Some(prev) = names.get(name) {
                 ecx.struct_span_err(e.span, &format!("duplicate argument named `{}`", name))