Index: llvm/trunk/lib/Object/MachOObjectFile.cpp
===================================================================
--- llvm/trunk/lib/Object/MachOObjectFile.cpp
+++ llvm/trunk/lib/Object/MachOObjectFile.cpp
@@ -107,7 +107,7 @@
 }
 
 static const char *getPtr(const MachOObjectFile &O, size_t Offset) {
-  return O.getData().substr(Offset, 1).data();
+  return O.getData().data() + Offset;
 }
 
 static MachO::nlist_base
Index: llvm/trunk/lib/Object/WasmObjectFile.cpp
===================================================================
--- llvm/trunk/lib/Object/WasmObjectFile.cpp
+++ llvm/trunk/lib/Object/WasmObjectFile.cpp
@@ -995,7 +995,7 @@
 }
 
 const uint8_t *WasmObjectFile::getPtr(size_t Offset) const {
-  return reinterpret_cast<const uint8_t *>(getData().substr(Offset, 1).data());
+  return reinterpret_cast<const uint8_t *>(getData().data() + Offset);
 }
 
 const wasm::WasmObjectHeader &WasmObjectFile::getHeader() const {