diff --git a/llvm/lib/IR/Verifier.cpp b/llvm/lib/IR/Verifier.cpp
--- a/llvm/lib/IR/Verifier.cpp
+++ b/llvm/lib/IR/Verifier.cpp
@@ -3150,6 +3150,9 @@
 
 void Verifier::verifyMustTailCall(CallInst &CI) {
   Assert(!CI.isInlineAsm(), "cannot use musttail call with inline asm", &CI);
+  // FIXME: support musttail + preallocated
+  Assert(!CI.countOperandBundlesOfType(LLVMContext::OB_preallocated),
+         "musttail and preallocated not yet supported", &CI);
 
   // - The caller and callee prototypes must match.  Pointer types of
   //   parameters or return types may differ in pointee type, but not
diff --git a/llvm/test/Verifier/preallocated-invalid.ll b/llvm/test/Verifier/preallocated-invalid.ll
--- a/llvm/test/Verifier/preallocated-invalid.ll
+++ b/llvm/test/Verifier/preallocated-invalid.ll
@@ -116,3 +116,10 @@
     %x = call i8* @llvm.call.preallocated.arg(token %t, i32 1) preallocated(i32)
     ret void
 }
+
+; CHECK: musttail and preallocated not yet supported
+define void @musttail() {
+    %cs = call token @llvm.call.preallocated.setup(i32 0)
+    musttail call void @foo0() ["preallocated"(token %cs)]
+    ret void
+}