Index: lldb/examples/python/crashlog.py
===================================================================
--- lldb/examples/python/crashlog.py
+++ lldb/examples/python/crashlog.py
@@ -1226,6 +1226,11 @@
 
 def SymbolicateCrashLogs(debugger, command_args):
     option_parser = CrashLogOptionParser()
+
+    if not len(command_args):
+        option_parser.print_help()
+        return
+
     try:
         (options, args) = option_parser.parse_args(command_args)
     except:
Index: lldb/test/Shell/ScriptInterpreter/Python/Crashlog/no-args.test
===================================================================
--- /dev/null
+++ lldb/test/Shell/ScriptInterpreter/Python/Crashlog/no-args.test
@@ -0,0 +1,9 @@
+# RUN: %lldb -o 'command script import lldb.macosx.crashlog' -o 'crashlog' 2>&1 | FileCheck %s
+
+# CHECK: "crashlog" {{.*}} commands have been installed, use the "--help" options on these commands
+
+# CHECK: Usage: crashlog [options] <FILE> [FILE ...]
+# CHECK: Symbolicate one or more darwin crash log files to provide source file and line
+# CHECK: Options:
+# CHECK:  -h, --help            show this help message and exit
+