Use llvm::joinErrors

Author: JDevlieghere

lldb/source/Expression/DWARFExpression.cpp

@@ -902,10 +902,12 @@ static llvm::Error Evaluate_DW_OP_deref(DWARFExpression::Stack &stack,
     lldb::addr_t pointer_value =
         process->ReadPointerFromMemory(pointer_addr, error);
     if (pointer_value == LLDB_INVALID_ADDRESS)
-      return llvm::createStringError(
-          "Failed to dereference pointer from 0x%" PRIx64
-          " for DW_OP_deref: %s\n",
-          pointer_addr, error.AsCString());
+      return llvm::joinErrors(
+          llvm::createStringError(
+              "Failed to dereference pointer from 0x%" PRIx64
+              " for DW_OP_deref",
+              pointer_addr),
+          error.takeError());
     if (ABISP abi_sp = process->GetABI())
       pointer_value = abi_sp->FixCodeAddress(pointer_value);
     stack.back().GetScalar() = pointer_value;