diff --git a/clang-tools-extra/clangd/refactor/tweaks/ExtractFunction.cpp b/clang-tools-extra/clangd/refactor/tweaks/ExtractFunction.cpp
--- a/clang-tools-extra/clangd/refactor/tweaks/ExtractFunction.cpp
+++ b/clang-tools-extra/clangd/refactor/tweaks/ExtractFunction.cpp
@@ -248,6 +248,13 @@
       // FIXME: Support extraction from templated functions.
       if (Func->isTemplated())
         return nullptr;
+      for (const auto *S : Func->getBody()->children()) {
+        // During apply phase, we perform semantic analysis (e.g. figure out
+        // what variables requires hoisting). We cannot perform those when the
+        // body has invalid statements, so fail up front.
+        if (!S)
+          return nullptr;
+      }
       return Func;
     }
   }