1 files changed, 6 insertions, 5 deletions
diff --git a/lld/lib/Passes/RoundTripYAMLPass.cpp b/lld/lib/Passes/RoundTripYAMLPass.cpp
index f2c859a5743..739ad7e5e10 100644
--- a/lld/lib/Passes/RoundTripYAMLPass.cpp
+++ b/lld/lib/Passes/RoundTripYAMLPass.cpp
@@ -46,11 +46,12 @@ void RoundTripYAMLPass::perform(std::unique_ptr<MutableFile> &mergedFile) {
   if (buff->getBufferSize() < MAX_YAML_FILE_SIZE) {
     std::unique_ptr<MemoryBuffer> mb(buff.take());
     error_code ec = _context.registry().parseFile(mb, _yamlFile);
-    assert(!ec && "yaml reader not registered");
-    File *objFile =  _yamlFile[0].get();
-    const File *obj = dyn_cast<const File>(objFile);
-    assert(obj && "yaml generated file is not an relocatable file");
-    mergedFile.reset(new FileToMutable(_context, *obj));
+    if (ec) {
+      // Note: we need a way for Passes to report errors.
+      llvm_unreachable("yaml reader not registered or read error"); 
+    }
+    File *objFile = _yamlFile[0].get();
+    mergedFile.reset(new FileToMutable(_context, *objFile));
   }
 
   llvm::sys::fs::remove(tmpYAMLFile.str());