[PATCH] D58447: [clangd] Fix a crash in Selection

[Ilya Biryukov via Phabricator via cfe-commits]

ilya-biryukov created this revision.
ilya-biryukov added reviewers: kadircet, sammccall.
Herald added subscribers: arphaman, jkorous, MaskRay, ioeric.
Herald added a project: clang.

The assertion checking that the range of the node is a token range does
not hold in case of "split" tokens, e.g. between two closing template
argument lists (vector<vector<int>>).


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D58447

Files:
  clang-tools-extra/clangd/Selection.cpp
  clang-tools-extra/unittests/clangd/SelectionTests.cpp


Index: clang-tools-extra/unittests/clangd/SelectionTests.cpp
===================================================================
--- clang-tools-extra/unittests/clangd/SelectionTests.cpp
+++ clang-tools-extra/unittests/clangd/SelectionTests.cpp
@@ -232,6 +232,11 @@
           }]]]]
         }
       )cpp",
+      R"cpp(
+          template <class T>
+          struct unique_ptr {}
+          void foo(^$C[[unique_ptr<unique_ptr<$C[[int]]>>]]^ a) {}
+      )cpp",
   };
   for (const char *C : Cases) {
     Annotations Test(C);
Index: clang-tools-extra/clangd/Selection.cpp
===================================================================
--- clang-tools-extra/clangd/Selection.cpp
+++ clang-tools-extra/clangd/Selection.cpp
@@ -198,11 +198,10 @@
       auto E = SM.getDecomposedLoc(R.getEnd());
       if (B.first != SelFile || E.first != SelFile)
         continue;
-      assert(R.isTokenRange());
       // Try to cover up to the next token, spaces between children don't count.
       if (auto Tok = Lexer::findNextToken(R.getEnd(), SM, LangOpts))
         E.second = SM.getFileOffset(Tok->getLocation());
-      else
+      else if (R.isTokenRange())
         E.second += Lexer::MeasureTokenLength(R.getEnd(), SM, LangOpts);
       ChildRanges.push_back({B.second, E.second});
     }


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