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-rw-r--r--src/libsyntax/ext/source_util.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libsyntax/ext/source_util.rs b/src/libsyntax/ext/source_util.rs
index 711f8ff11ee..a9f94da7a98 100644
--- a/src/libsyntax/ext/source_util.rs
+++ b/src/libsyntax/ext/source_util.rs
@@ -109,7 +109,7 @@ pub fn expand_include_str(cx: &mut ExtCtxt, sp: Span, tts: &[ast::TokenTree])
         }
         Ok(bytes) => bytes,
     };
-    match str::from_utf8_owned_opt(bytes) {
+    match str::from_utf8_owned(bytes) {
         Some(src) => {
             // Add this input file to the code map to make it available as
             // dependency information