Attempt to fix buildbot after r353679 #2

llvm-svn: 353683

Author: eleviant

llvm/include/llvm/Support/Error.h

@@ -1195,7 +1195,7 @@ class FileError final : public ErrorInfo<FileError> {
 private:
   FileError(const Twine &F, std::unique_ptr<ErrorInfoBase> E) {
     assert(E && "Cannot create FileError from Error success value.");
-    assert(!F.isEmpty() &&
+    assert(!F.isTriviallyEmpty() &&
            "The file name provided to FileError must not be empty.");
     FileName = F.str();
     Err = std::move(E);