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-rw-r--r--src/librustdoc/lib.rs3
1 files changed, 0 insertions, 3 deletions
diff --git a/src/librustdoc/lib.rs b/src/librustdoc/lib.rs
index f28deae791a..36d087a7d5b 100644
--- a/src/librustdoc/lib.rs
+++ b/src/librustdoc/lib.rs
@@ -744,9 +744,6 @@ fn main_args(handler: &mut EarlyErrorHandler, at_args: &[String]) -> MainResult
         }
     };
 
-    // Set parallel mode before error handler creation, which will create `Lock`s.
-    interface::set_thread_safe_mode(&options.unstable_opts);
-
     let diag = core::new_handler(
         options.error_format,
         None,