[clang-tidy] Fix check for generic lambda invented template parameters

clang-tidy previously relied on there being no identifier for a TemplateTypeParmDecl for checking
whether 'decltype(x)' should be inserted, instead of checking whether or not it is implicit.

D65042 added new names for invented generic lambda template parameters, rendering that check incorrect.

(cherry picked from commit 5fdad8e3f803adce501ca25118f325184e54018d)

1 files changed, 1 insertions, 1 deletions

diff --git a/clang-tools-extra/clang-tidy/bugprone/MoveForwardingReferenceCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/MoveForwardingReferenceCheck.cpp
index bf6f2f6ed03..8953f95159a 100644
--- a/clang-tools-extra/clang-tidy/bugprone/MoveForwardingReferenceCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/MoveForwardingReferenceCheck.cpp
@@ -33,7 +33,7 @@ static void replaceMoveWithForward(const UnresolvedLookupExpr *Callee,
 
   if (CallRange.isValid()) {
     const std::string TypeName =
-        TypeParmDecl->getIdentifier()
+        (TypeParmDecl->getIdentifier() && !TypeParmDecl->isImplicit())
             ? TypeParmDecl->getName().str()
             : (llvm::Twine("decltype(") + ParmVar->getName() + ")").str();