| /* |
| * Copyright (c) 2016 Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /** |
| * JDK-8168373: don't emit conversions for symbols outside their lexical scope |
| * |
| * @test |
| * @run |
| * @option --language=es6 |
| */ |
| |
| function p() { return false } // "predicate" |
| function r(x) { return x } // "read" |
| |
| (function() { |
| try { // Try creates control flow edges from assignments into catch blocks. |
| // Lexically scoped, never read int variable (undefined at catch block) but still with a cf edge into catch block. |
| // Since it's never read, it's not written either (Nashorn optimizes some dead writes). |
| let x = 0; |
| if (p()) { throw {}; } // We need `p()` so this block doesn't get optimized away, for possibility of a `throw` |
| x = 0.0; // change the type of x to double |
| r(x); // read x otherwise it's optimized away |
| } catch (e) {} // under the bug, "throw" will try to widen unwritten int x to double for here and cause a verifier error |
| })() |
