diff --git a/lldb/tools/debugserver/source/MacOSX/MachProcess.mm b/lldb/tools/debugserver/source/MacOSX/MachProcess.mm
--- a/lldb/tools/debugserver/source/MacOSX/MachProcess.mm
+++ b/lldb/tools/debugserver/source/MacOSX/MachProcess.mm
@@ -743,7 +743,10 @@
   case PLATFORM_DRIVERKIT:
     return "driverkit";
   }
-  return nullptr;
+  DNBLogError(
+      "Unknown platform %u found for one binary, returning empty string",
+      platform);
+  return "";
 }
 
 static bool mach_header_validity_test(uint32_t magic, uint32_t cputype) {