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-rw-r--r--src/libstd/ffi/c_str.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libstd/ffi/c_str.rs b/src/libstd/ffi/c_str.rs
index 3ad5b5627d3..d1b8fcd7440 100644
--- a/src/libstd/ffi/c_str.rs
+++ b/src/libstd/ffi/c_str.rs
@@ -686,7 +686,7 @@ impl ToOwned for CStr {
     type Owned = CString;
 
     fn to_owned(&self) -> CString {
-        unsafe { CString::from_vec_unchecked(self.to_bytes().to_vec()) }
+        CString { inner: self.to_bytes_with_nul().to_vec().into_boxed_slice() }
     }
 }