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-rw-r--r--compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp b/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
index eb99d560e57..6f47ee88add 100644
--- a/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
+++ b/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
@@ -1624,5 +1624,6 @@ extern "C" void LLVMRustComputeLTOCacheKey(RustStringRef KeyOut,
                            CfiFunctionDefs, CfiFunctionDecls);
 #endif
 
-  LLVMRustStringWriteImpl(KeyOut, Key.c_str(), Key.size());
+  auto OS = RawRustStringOstream(KeyOut);
+  OS << Key.str();
 }