[Lldb-commits] [PATCH] D154643: [lldb] Prevent crash when completing ambiguous subcommands

[Jonas Devlieghere via Phabricator via lldb-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rGfb10b01cca85: [lldb] Prevent crash when completing ambiguous subcommands (authored by JDevlieghere).
Herald added a project: LLDB.

Changed prior to commit:
  https://reviews.llvm.org/D154643?vs=537829&id=538837#toc

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D154643/new/

https://reviews.llvm.org/D154643

Files:
  lldb/source/Commands/CommandObjectMultiword.cpp
  lldb/test/API/functionalities/completion/TestCompletion.py


Index: lldb/test/API/functionalities/completion/TestCompletion.py
===================================================================
--- lldb/test/API/functionalities/completion/TestCompletion.py
+++ lldb/test/API/functionalities/completion/TestCompletion.py
@@ -880,3 +880,11 @@
         self.complete_from_to("breakpoint set -N n", "breakpoint set -N n")
         self.assertTrue(bp1.AddNameWithErrorHandling("nn"))
         self.complete_from_to("breakpoint set -N ", "breakpoint set -N nn")
+
+    def test_ambiguous_command(self):
+        """Test completing an ambiguous commands"""
+        self.complete_from_to("settings s", ['set', 'show'])
+
+    def test_ambiguous_subcommand(self):
+        """Test completing a subcommand of an ambiguous command"""
+        self.complete_from_to("settings s ta", [])
Index: lldb/source/Commands/CommandObjectMultiword.cpp
===================================================================
--- lldb/source/Commands/CommandObjectMultiword.cpp
+++ lldb/source/Commands/CommandObjectMultiword.cpp
@@ -274,10 +274,10 @@
 
   StringList new_matches;
   CommandObject *sub_command_object = GetSubcommandObject(arg0, &new_matches);
-  if (sub_command_object == nullptr) {
-    request.AddCompletions(new_matches);
+
+  // The subcommand is ambiguous. The completion isn't meaningful.
+  if (!sub_command_object)
     return;
-  }
 
   // Remove the one match that we got from calling GetSubcommandObject.
   new_matches.DeleteStringAtIndex(0);


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