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-rw-r--r--src/rustllvm/PassWrapper.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/rustllvm/PassWrapper.cpp b/src/rustllvm/PassWrapper.cpp
index d9fbd494ab3..46825efeee2 100644
--- a/src/rustllvm/PassWrapper.cpp
+++ b/src/rustllvm/PassWrapper.cpp
@@ -556,7 +556,8 @@ LLVMRustWriteOutputFile(LLVMTargetMachineRef Target, LLVMPassManagerRef PMR,
   }
 
 #if LLVM_VERSION_GE(7, 0)
-  unwrap(Target)->addPassesToEmitFile(*PM, OS, nullptr, FileType, false);
+  buffer_ostream BOS(OS);
+  unwrap(Target)->addPassesToEmitFile(*PM, BOS, nullptr, FileType, false);
 #else
   unwrap(Target)->addPassesToEmitFile(*PM, OS, FileType, false);
 #endif