diff --git a/clang/lib/Parse/ParseExpr.cpp b/clang/lib/Parse/ParseExpr.cpp
--- a/clang/lib/Parse/ParseExpr.cpp
+++ b/clang/lib/Parse/ParseExpr.cpp
@@ -3128,6 +3128,16 @@
 
     if (Tok.is(tok::ellipsis))
       Expr = Actions.ActOnPackExpansion(Expr.get(), ConsumeToken());
+    else if (Tok.is(tok::code_completion)) {
+      // There's nothing to suggest in here as we parsed a full expression.
+      // Instead fail and propogate the error since caller might have something
+      // the suggest, e.g. signature help in function call. Note that this is
+      // performed before pushing the \p Expr, so that signature help can report
+      // current argument correctly.
+      SawError = true;
+      cutOffParsing();
+      break;
+    }
     if (Expr.isInvalid()) {
       SkipUntil(tok::comma, tok::r_paren, StopBeforeMatch);
       SawError = true;
diff --git a/clang/test/CodeCompletion/call.cpp b/clang/test/CodeCompletion/call.cpp
--- a/clang/test/CodeCompletion/call.cpp
+++ b/clang/test/CodeCompletion/call.cpp
@@ -25,4 +25,10 @@
   // RUN: %clang_cc1 -fsyntax-only -code-completion-at=%s:19:13 %s -o - | FileCheck -check-prefix=CHECK-CC2 %s
   // CHECK-CC2-NOT: f(Y y, int ZZ)
   // CHECK-CC2: f(int i, int j, <#int k#>)
+  f({}, 0, 0);
+  // RUN: %clang_cc1 -fsyntax-only -code-completion-patterns -code-completion-at=%s:28:7 %s -o - | FileCheck -check-prefix=CHECK-CC3 %s
+  // CHECK-CC3: OVERLOAD: [#void#]f()
+  // CHECK-CC3-NEXT: OVERLOAD: [#void#]f(<#X#>)
+  // CHECK-CC3-NEXT: OVERLOAD: [#void#]f(<#int i#>, int j, int k)
+  // CHECK-CC3-NEXT: OVERLOAD: [#void#]f(<#float x#>, float y)
 }