[clang-tools-extra] c282b7d - [clangd] AddUsing: Fix a crash on ElaboratedTypes without NestedNameSpecfiiers.

[Adam Czachorowski via cfe-commits]

Author: Adam Czachorowski
Date: 2020-12-03T20:25:38+01:00
New Revision: c282b7de5a5de8151a19228702867e2299f1d3fe

URL: https://github.com/llvm/llvm-project/commit/c282b7de5a5de8151a19228702867e2299f1d3fe
DIFF: https://github.com/llvm/llvm-project/commit/c282b7de5a5de8151a19228702867e2299f1d3fe.diff

LOG: [clangd] AddUsing: Fix a crash on ElaboratedTypes without NestedNameSpecfiiers.

Differential Revision: https://reviews.llvm.org/D92579

Added: 
    

Modified: 
    clang-tools-extra/clangd/refactor/tweaks/AddUsing.cpp
    clang-tools-extra/clangd/unittests/TweakTests.cpp

Removed: 
    


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diff  --git a/clang-tools-extra/clangd/refactor/tweaks/AddUsing.cpp b/clang-tools-extra/clangd/refactor/tweaks/AddUsing.cpp
index b00c2716005c7..d6a57efeeef13 100644
--- a/clang-tools-extra/clangd/refactor/tweaks/AddUsing.cpp
+++ b/clang-tools-extra/clangd/refactor/tweaks/AddUsing.cpp
@@ -274,6 +274,8 @@ bool AddUsing::prepare(const Selection &Inputs) {
   } else if (auto *T = Node->ASTNode.get<TypeLoc>()) {
     if (auto E = T->getAs<ElaboratedTypeLoc>()) {
       QualifierToRemove = E.getQualifierLoc();
+      if (!QualifierToRemove)
+        return false;
 
       auto SpelledTokens =
           TB.spelledForExpanded(TB.expandedTokens(E.getSourceRange()));

diff  --git a/clang-tools-extra/clangd/unittests/TweakTests.cpp b/clang-tools-extra/clangd/unittests/TweakTests.cpp
index eefc50d754e2a..07f061b3f2e39 100644
--- a/clang-tools-extra/clangd/unittests/TweakTests.cpp
+++ b/clang-tools-extra/clangd/unittests/TweakTests.cpp
@@ -2523,6 +2523,9 @@ class cc {
   // Do not offer code action on typo-corrections.
   EXPECT_UNAVAILABLE(Header + "/*error-ok*/c^c C;");
 
+  // NestedNameSpecifier, but no namespace.
+  EXPECT_UNAVAILABLE(Header + "class Foo {}; class F^oo foo;");
+
   // Check that we do not trigger in header files.
   FileName = "test.h";
   ExtraArgs.push_back("-xc++-header"); // .h file is treated a C by default.