Fix memory corruption issue.

- Since BasicTargetInterface is a BReferenceable, we must not create it
  on the stack, else it will be destroyed while others still have
  references to it. Fixes various random crashes, though most frequently
  observable when typecasting with more complex types.

src/apps/debugger/debug_info/DwarfImageDebugInfo.cpp

@@ -417,8 +417,15 @@ DwarfImageDebugInfo::GetType(GlobalTypeCache* cache,
 	BReference<RegisterMap> fromDwarfMapReference(fromDwarfMap, true);
 
 	// create the target interface
-	BasicTargetInterface inputInterface(registers, registerCount, fromDwarfMap,
-		fArchitecture, fTeamMemory);
+	BasicTargetInterface *inputInterface
+		= new(std::nothrow) BasicTargetInterface(registers, registerCount,
+			fromDwarfMap, fArchitecture, fTeamMemory);
+
+	if (inputInterface == NULL)
+		return B_NO_MEMORY;
+
+	BReference<BasicTargetInterface> inputInterfaceReference(inputInterface,
+		true);
 
 	// iterate through all compilation units
 	for (int32 i = 0; CompilationUnit* unit = fFile->CompilationUnitAt(i);
@@ -458,7 +465,7 @@ DwarfImageDebugInfo::GetType(GlobalTypeCache* cache,
 			if (typeContext == NULL) {
 				typeContext = new(std::nothrow)
 					DwarfTypeContext(fArchitecture, fImageInfo.ImageID(), fFile,
-					unit, NULL, 0, 0, fRelocationDelta, &inputInterface,
+					unit, NULL, 0, 0, fRelocationDelta, inputInterface,
 					fromDwarfMap);
 				if (typeContext == NULL)
 					return B_NO_MEMORY;