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-rw-r--r--src/liballoc_jemalloc/build.rs3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/liballoc_jemalloc/build.rs b/src/liballoc_jemalloc/build.rs
index e43b9a9df1b..d1b3583d256 100644
--- a/src/liballoc_jemalloc/build.rs
+++ b/src/liballoc_jemalloc/build.rs
@@ -43,7 +43,8 @@ fn main() {
     }
 
     let compiler = gcc::Config::new().get_compiler();
-    let ar = build_helper::cc2ar(compiler.path(), &target);
+    // only msvc returns None for ar so unwrap is okay
+    let ar = build_helper::cc2ar(compiler.path(), &target).unwrap();
     let cflags = compiler.args()
                          .iter()
                          .map(|s| s.to_str().unwrap())