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## Story
Iain Ireland on the SpiderMonkey team just completed a major upgrade of our JavaScript regular expression engine. The net result is a major improvement in Firefox compatibility.
https:…
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### Version: b6530ae
### Testcase:
``` javaScript:
var NISLFuzzingFunc = function (nislMutationParameter0) {
var i = new Error(nislMutationParameter0);
var tmp = i["message"];
print(…
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* **Version**: v14.3.0 (also occurs on v10.21.0 and v12.18.1)
* **Platform**: Windows 10 x64 **and** Ubuntu Xenial 16.04
* **Subsystem**: N/A
### What steps will reproduce the bug?
1. Star…
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[ecosystem.md](https://github.com/unicode-org/omnicu/blob/master/docs/ecosystem.md) mentions `icu::Regex`. The Rust [`regex` crate](https://crates.io/crates/regex) already exists and is very performan…
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See [this es-discuss thread](https://esdiscuss.org/topic/assignment-of-global-variables-deleted-by-their-rhs-in-strict-mode).
This invalidates at least the following tests:
- [`test/language/expressi…
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> This test seems like a false positive. It doesn't seem like the assertions are relying on the the Promise subclass at all, but just returning what finally returns.
> I wonder if the goal was chec…
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I installed the tools `emscripten-incoming-64bit` and `binaryen-master-64bit` through the EMSDK but, when I try to activate them it says they haven't been installed and skips them.
```
emsdk act…
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Hello, I'm trying to update my engines via jsvu.
The engines Chakra, SpiderMonkey and JavaScriptCore works as expected, but V8 throws a Promisse error when try to rename a file that does not exists.
…
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(Sorry for skipping the template, but it did not match what I wanted to talk about.)
It's not too long ago that I looked at the Servo browser engine: https://github.com/servo/servo
It always see…