diff --git a/clang-tools-extra/clangd/InlayHints.cpp b/clang-tools-extra/clangd/InlayHints.cpp
--- a/clang-tools-extra/clangd/InlayHints.cpp
+++ b/clang-tools-extra/clangd/InlayHints.cpp
@@ -303,8 +303,8 @@
       return true;
     }
 
-    if (D->getType()->getContainedAutoType()) {
-      if (!D->getType()->isDependentType()) {
+    if (auto *AT = D->getType()->getContainedAutoType()) {
+      if (AT->isDeduced() && !D->getType()->isDependentType()) {
         // Our current approach is to place the hint on the variable
         // and accordingly print the full type
         // (e.g. for `const auto& x = 42`, print `const int&`).
diff --git a/clang-tools-extra/clangd/unittests/InlayHintTests.cpp b/clang-tools-extra/clangd/unittests/InlayHintTests.cpp
--- a/clang-tools-extra/clangd/unittests/InlayHintTests.cpp
+++ b/clang-tools-extra/clangd/unittests/InlayHintTests.cpp
@@ -1256,6 +1256,13 @@
   )cpp");
 }
 
+TEST(TypeHints, InvalidType) {
+  assertTypeHints(R"cpp(
+    auto x = (unknown_type)42; /*error-ok*/
+    auto *y = (unknown_ptr)nullptr;
+  )cpp");
+}
+
 TEST(TypeHints, ReturnTypeDeduction) {
   assertTypeHints(
       R"cpp(