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###### Version
rhino-1.7.13
###### Test case
```js
var a = 6;
Object.defineProperty(this,"a",{
writable: false
});
```
###### Execution steps
java -jar rhino-1.7.13.jar -d…
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I've got a bit of a challenging one here. It's hard to trace the issue because I don't have debug information available from SpiderMonkey (will traces from the engine be available via some debug mode …
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According to ECMA-262 6th edition, early errors ensure that duplicate parameter names can only occur in non-strict functions [[reference](http://www.ecma-international.org/ecma-262/6.0/index.html#sec-…
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I've noticed several times that the meaning of the CI results is confusing for contributors:
This loo…
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```
$ ./emsdk activate emscripten-1.38.31
... contents:
import os
EMSCRIPTEN_ROOT = '/emsdk/emsdk/emscripten/1.38.31'
SPIDERMONKEY_ENGINE = ''
NODE_JS = 'node'
V8_ENGINE = ''
TEMP_DIR = '/tm…
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I checked some of the engine/tool issue trackers and couldn't find any clear signal on what the status of the proposal is when it comes to stage 3 implementations. What I found so far:
- [x] Babel:…
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我看现在的代码只是hook了so文件来获取明文的Javascript，有没有什么办法能hook到后面的Javascript里的函数，实现Javascript执行的控制？
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### What is the issue with the URL Pattern Standard?
I've recently come across [this bug report](https://github.com/kenchris/urlpattern-polyfill/issues/121) in the popular urlpattern-polyfill libra…
johnp updated
2 months ago
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**What is the code triggering the message?**
```js
let z = { a: { b: { } } }
z.a.b.c.d
```
**What went wrong in the code? What is the system trying to tell you?**
That `z.a.b.c` is `undefi…
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Related to the changes in https://github.com/konsoletyper/teavm/commit/8277671376b7745f9f33a1dc1206cbb8d66a0cb2 (https://github.com/konsoletyper/teavm/pull/749), assertions that test for bit specific …