[clang-tidy] Don't generate fixes for invalid new expr location in modernize-make-unique.

Reviewers: ilya-biryukov

Reviewed By: ilya-biryukov

Subscribers: klimek, xazax.hun, cfe-commits

Differential Revision: https://reviews.llvm.org/D42363

llvm-svn: 323191

clang-tools-extra/clang-tidy/modernize/MakeSmartPtrCheck.cpp

@@ -241,6 +241,10 @@ bool MakeSmartPtrCheck::replaceNew(DiagnosticBuilder &Diag,
   SourceLocation NewStart = New->getSourceRange().getBegin();
   SourceLocation NewEnd = New->getSourceRange().getEnd();
 
+  // Skip when the source location of the new expression is invalid.
+  if (NewStart.isInvalid() || NewEnd.isInvalid())
+    return false;
+
   std::string ArraySizeExpr;
   if (const auto* ArraySize = New->getArraySize()) {
     ArraySizeExpr = Lexer::getSourceText(CharSourceRange::getTokenRange(

clang-tools-extra/test/clang-tidy/modernize-make-unique.cpp

@@ -498,3 +498,12 @@ void invoke_template() {
   Foo* foo;
   template_fun(foo);
 }
+
+void no_fix_for_invalid_new_loc() {
+  // FIXME: Although the code is valid, the end location of `new struct Base` is
+  // invalid. Correct it once https://bugs.llvm.org/show_bug.cgi?id=35952 is
+  // fixed.
+  auto T = std::unique_ptr<Base>(new struct Base);
+  // CHECK-MESSAGES: :[[@LINE-1]]:12: warning: use std::make_unique instead
+  // CHECK-FIXES: auto T = std::unique_ptr<Base>(new struct Base);
+}