Index: llvm/trunk/test/tools/obj2yaml/missing_symtab.test
===================================================================
--- llvm/trunk/test/tools/obj2yaml/missing_symtab.test
+++ llvm/trunk/test/tools/obj2yaml/missing_symtab.test
@@ -0,0 +1,5 @@
+# RUN: obj2yaml %S/Inputs/crt1.o | FileCheck %s
+# test that we don't crash when passed object files without a symbol table
+# CHECK-LABEL: FileHeader:
+# CHECK-LABEL: Sections:
+# CHECK-LABEL: Symbols:
Index: llvm/trunk/tools/obj2yaml/elf2yaml.cpp
===================================================================
--- llvm/trunk/tools/obj2yaml/elf2yaml.cpp
+++ llvm/trunk/tools/obj2yaml/elf2yaml.cpp
@@ -188,6 +188,8 @@
   }
 
   // Dump symbols
+  if (!Symtab)
+    return Y.release(); // if the symbol table is missing return early
   auto StrTableOrErr = Obj.getStringTableForSymtab(*Symtab);
   if (!StrTableOrErr)
     return errorToErrorCode(StrTableOrErr.takeError());