[PATCH] D62404: [clang-tidy] Fix null pointer dereference in readability-identifier-naming

[Mark Stegeman via Phabricator via cfe-commits]

markstegeman updated this revision to Diff 201401.
markstegeman added a comment.

Added a test.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D62404/new/

https://reviews.llvm.org/D62404

Files:
  clang-tools-extra/clang-tidy/readability/IdentifierNamingCheck.cpp
  clang-tools-extra/test/clang-tidy/readability-identifier-naming-bugfix.cpp


Index: clang-tools-extra/test/clang-tidy/readability-identifier-naming-bugfix.cpp
===================================================================
--- /dev/null
+++ clang-tools-extra/test/clang-tidy/readability-identifier-naming-bugfix.cpp
@@ -0,0 +1,5 @@
+// RUN: %check_clang_tidy -expect-clang-tidy-error %s readability-identifier-naming %t
+
+// This used to cause a null pointer dereference.
+auto [left] = right;
+// CHECK-MESSAGES: :[[@LINE-1]]:15: error: use of undeclared identifier 'right'
Index: clang-tools-extra/clang-tidy/readability/IdentifierNamingCheck.cpp
===================================================================
--- clang-tools-extra/clang-tidy/readability/IdentifierNamingCheck.cpp
+++ clang-tools-extra/clang-tidy/readability/IdentifierNamingCheck.cpp
@@ -800,10 +800,11 @@

     // Fix type aliases in value declarations
     if (const auto *Value = Result.Nodes.getNodeAs<ValueDecl>("decl")) {
-      if (const auto *Typedef =
-              Value->getType().getTypePtr()->getAs<TypedefType>()) {
-        addUsage(NamingCheckFailures, Typedef->getDecl(),
-                 Value->getSourceRange());
+      if (const auto *TypePtr = Value->getType().getTypePtrOrNull()) {
+        if (const auto *Typedef = TypePtr->getAs<TypedefType>()) {
+          addUsage(NamingCheckFailures, Typedef->getDecl(),
+                   Value->getSourceRange());
+        }
       }
     }



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