diff --git a/clang/lib/AST/DeclPrinter.cpp b/clang/lib/AST/DeclPrinter.cpp
--- a/clang/lib/AST/DeclPrinter.cpp
+++ b/clang/lib/AST/DeclPrinter.cpp
@@ -731,7 +731,6 @@
         FT->getNoexceptExpr()->printPretty(EOut, nullptr, SubPolicy,
                                            Indentation, "\n", &Context);
         EOut.flush();
-        Proto += EOut.str();
         Proto += ")";
       }
     }
diff --git a/clang/unittests/AST/DeclPrinterTest.cpp b/clang/unittests/AST/DeclPrinterTest.cpp
--- a/clang/unittests/AST/DeclPrinterTest.cpp
+++ b/clang/unittests/AST/DeclPrinterTest.cpp
@@ -909,8 +909,7 @@
     "  void A(int a) noexcept(true);"
     "};",
     "A",
-    "void A(int a) noexcept(trueA(int a) noexcept(true)"));
-    // WRONG; Should be: "void A(int a) noexcept(true);"
+    "void A(int a) noexcept(true)"));
 }
 
 TEST(DeclPrinter, TestFunctionDecl_ExceptionSpecification6) {
@@ -919,8 +918,7 @@
     "  void A(int a) noexcept(1 < 2);"
     "};",
     "A",
-    "void A(int a) noexcept(1 < 2A(int a) noexcept(1 < 2)"));
-    // WRONG; Should be: "void A(int a) noexcept(1 < 2);"
+    "void A(int a) noexcept(1 < 2)"));
 }
 
 TEST(DeclPrinter, TestFunctionDecl_ExceptionSpecification7) {
@@ -930,8 +928,7 @@
     "  void A(int a) noexcept(N < 2);"
     "};",
     "A",
-    "void A(int a) noexcept(N < 2A(int a) noexcept(N < 2)"));
-    // WRONG; Should be: "void A(int a) noexcept(N < 2);"
+    "void A(int a) noexcept(N < 2)"));
 }
 
 TEST(DeclPrinter, TestVarDecl1) {