[[FIX]] Improve declaration parsing

Add an internal test so the coverage analysis tool recognizes that the
modified branch is verified.

src/jshint.js

@@ -4670,8 +4670,11 @@ var JSHINT = (function() {
       error("E008", this.name);
     }
 
-    if (state.tokens.next.id === "(" && state.tokens.next.line === state.tokens.curr.line) {
-      /* istanbul ignore next */
+    // Although the parser correctly recognizes the statement boundary in this
+    // condition, it's support for the invalid "empty grouping" expression
+    // makes it tolerant of productions such as `function f() {}();`.
+    if (state.tokens.next.id === "(" && peek().id === ")" && peek(1).id !== "=>" &&
+      state.tokens.next.line === state.tokens.curr.line) {
       error("E039");
     }
     return this;

tests/test262/expectations.txt

@@ -9028,12 +9028,6 @@ test/language/statementList/class-regexp-literal-flags.js(default)
 test/language/statementList/class-regexp-literal-flags.js(strict mode)
 test/language/statementList/class-regexp-literal.js(default)
 test/language/statementList/class-regexp-literal.js(strict mode)
-test/language/statementList/fn-arrow-function-assignment-expr.js(default)
-test/language/statementList/fn-arrow-function-assignment-expr.js(strict mode)
-test/language/statementList/fn-arrow-function-functionbody.js(default)
-test/language/statementList/fn-arrow-function-functionbody.js(strict mode)
-test/language/statementList/fn-expr-arrow-function-boolean-literal.js(default)
-test/language/statementList/fn-expr-arrow-function-boolean-literal.js(strict mode)
 test/language/statementList/fn-regexp-literal-flags.js(default)
 test/language/statementList/fn-regexp-literal-flags.js(strict mode)
 test/language/statementList/fn-regexp-literal.js(default)

tests/unit/parser.js

@@ -10263,3 +10263,20 @@ exports.asyncIteration = function (test) {
 
   test.done();
 };
+
+exports.parensAfterDeclaration = function (test) {
+  TestRun(test)
+    .addError(1, 17, "Function declarations are not invocable. Wrap the whole function invocation in parens.")
+    .addError(1, 18, "Expected an assignment or function call and instead saw an expression.")
+    .test("function f () {}();");
+
+  TestRun(test)
+    .addError(1, 19, "Expected an assignment or function call and instead saw an expression.")
+    .test("function f () {}(0);");
+
+  TestRun(test)
+    .addError(1, 24, "Expected an assignment or function call and instead saw an expression.")
+    .test("function f () {}() => {};", {esversion: 6});
+
+  test.done();
+};