Add missing case to declaration diagnostic handler

Author: weswigham

src/compiler/transformers/declarations/diagnostics.ts

@@ -410,6 +410,7 @@ namespace ts {
                     }
                     break;
 
+                case SyntaxKind.FunctionType:
                 case SyntaxKind.FunctionDeclaration:
                     diagnosticMessage = Diagnostics.Type_parameter_0_of_exported_function_has_or_is_using_private_name_1;
                     break;

tests/baselines/reference/declarationEmitLambdaWithMissingTypeParameterNoCrash.errors.txt

@@ -0,0 +1,13 @@
+tests/cases/compiler/declarationEmitLambdaWithMissingTypeParameterNoCrash.ts(2,27): error TS2304: Cannot find name 'T2'.
+tests/cases/compiler/declarationEmitLambdaWithMissingTypeParameterNoCrash.ts(2,27): error TS4016: Type parameter 'T1' of exported function has or is using private name 'T2'.
+
+
+==== tests/cases/compiler/declarationEmitLambdaWithMissingTypeParameterNoCrash.ts (2 errors) ====
+    export interface Foo {
+        preFetch: <T1 extends T2> (c: T1) => void; // Type T2 is not defined
+                              ~~
+!!! error TS2304: Cannot find name 'T2'.
+                              ~~
+!!! error TS4016: Type parameter 'T1' of exported function has or is using private name 'T2'.
+    }
+    

tests/baselines/reference/declarationEmitLambdaWithMissingTypeParameterNoCrash.js

@@ -0,0 +1,9 @@
+//// [declarationEmitLambdaWithMissingTypeParameterNoCrash.ts]
+export interface Foo {
+    preFetch: <T1 extends T2> (c: T1) => void; // Type T2 is not defined
+}
+
+
+//// [declarationEmitLambdaWithMissingTypeParameterNoCrash.js]
+"use strict";
+exports.__esModule = true;

tests/baselines/reference/declarationEmitLambdaWithMissingTypeParameterNoCrash.symbols

@@ -0,0 +1,11 @@
+=== tests/cases/compiler/declarationEmitLambdaWithMissingTypeParameterNoCrash.ts ===
+export interface Foo {
+>Foo : Symbol(Foo, Decl(declarationEmitLambdaWithMissingTypeParameterNoCrash.ts, 0, 0))
+
+    preFetch: <T1 extends T2> (c: T1) => void; // Type T2 is not defined
+>preFetch : Symbol(Foo.preFetch, Decl(declarationEmitLambdaWithMissingTypeParameterNoCrash.ts, 0, 22))
+>T1 : Symbol(T1, Decl(declarationEmitLambdaWithMissingTypeParameterNoCrash.ts, 1, 15))
+>c : Symbol(c, Decl(declarationEmitLambdaWithMissingTypeParameterNoCrash.ts, 1, 31))
+>T1 : Symbol(T1, Decl(declarationEmitLambdaWithMissingTypeParameterNoCrash.ts, 1, 15))
+}
+

tests/baselines/reference/declarationEmitLambdaWithMissingTypeParameterNoCrash.types

@@ -0,0 +1,7 @@
+=== tests/cases/compiler/declarationEmitLambdaWithMissingTypeParameterNoCrash.ts ===
+export interface Foo {
+    preFetch: <T1 extends T2> (c: T1) => void; // Type T2 is not defined
+>preFetch : <T1 extends any>(c: T1) => void
+>c : T1
+}
+

tests/cases/compiler/declarationEmitLambdaWithMissingTypeParameterNoCrash.ts

@@ -0,0 +1,4 @@
+// @declaration: true
+export interface Foo {
+    preFetch: <T1 extends T2> (c: T1) => void; // Type T2 is not defined
+}