# Rust 1.36.0 pre-release testing
**URL:** https://internals.rust-lang.org/t/rust-1-36-0-pre-release-testing/10490
**Category:** announcements
**Created:** [June 29, 2019, 7:24pm UTC](https://internals.rust-lang.org/t/rust-1-36-0-pre-release-testing/10490 "2019-06-29T19:24:57Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@Mark\_Simulacrum](https://internals.rust-lang.org/u/Mark_Simulacrum)
#### Post date: [June 29, 2019, 7:24pm UTC](https://internals.rust-lang.org/t/rust-1-36-0-pre-release-testing/10490/1 "2019-06-29T19:24:57Z")
The 1.36.0 pre-release is ready for testing. Rust 1.36.0 is scheduled to be released on Thursday July 4th. Release notes can be found here: [https://github.com/rust-lang/rust/blob/master/RELEASES.md](https://github.com/rust-lang/rust/blob/master/RELEASES.md#version-1360-2019-07-04).
You can try it out locally with:
```bash
RUSTUP_DIST_SERVER=https://dev-static.rust-lang.org rustup update stable
```
The index is [https://dev-static.rust-lang.org/dist/2019-07-03/index.html](https://dev-static.rust-lang.org/dist/2019-07-03/index.html).
---
### Author:  [@semarie](https://internals.rust-lang.org/u/semarie)
#### Post date: [July 2, 2019, 4:39am UTC](https://internals.rust-lang.org/t/rust-1-36-0-pre-release-testing/10490/2 "2019-07-02T04:39:59Z")
I have a problem while building firefox-60.7.2esr with rustc-1.36.0, whereas it build fine with rustc-1.35.0.
A bug report has been opened on firefox side: [https://bugzilla.mozilla.org/show\_bug.cgi?id=1562579](https://bugzilla.mozilla.org/show_bug.cgi?id=1562579) but it has been classified as WONTFIX as it seems it is required to downstream to use rustc-1.24.0 to build it.
But I wonder if the problem (regression from stable to stable) is expected, and where is the origin (change in libstd ? in compiler ? somewhere else ?).
Any hint to help building firefox-esr with up-to-date compiler would be also appreciate.
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### Author:  [@tobik](https://internals.rust-lang.org/u/tobik)
#### Post date: [July 2, 2019, 6:21am UTC](https://internals.rust-lang.org/t/rust-1-36-0-pre-release-testing/10490/3 "2019-07-02T06:21:42Z")
On FreeBSD we patch firefox-esr and thunderbird like this at the moment: [https://reviews.freebsd.org/D20810#change-K68aYoUXfAu1](https://reviews.freebsd.org/D20810#change-K68aYoUXfAu1)
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### Author:  [@CAD97](https://internals.rust-lang.org/u/CAD97)
#### Post date: [July 2, 2019, 12:16pm UTC](https://internals.rust-lang.org/t/rust-1-36-0-pre-release-testing/10490/4 "2019-07-02T12:16:05Z")
Here’s the regression on the playground: [https://play.rust-lang.org/?version=beta&mode=debug&edition=2018&gist=8d5873c1e67b3b5d7efb042816b92ac0](https://play.rust-lang.org/?version=beta&mode=debug&edition=2018&gist=8d5873c1e67b3b5d7efb042816b92ac0)
Compiles on stable, fails on beta.
It seems that the inferred `UnwindSafe` conditions of `HashMap` changed with the use of hashbrown ~~, _but_ I failed to reduce this to just using a simple local `!UnwindSafe` type, so it may also be related to the `RegexSet`~~.
**EDIT** : minimized
I opened an issue here: [https://github.com/rust-lang/rust/issues/62301](https://github.com/rust-lang/rust/issues/62301)
---
### Author:  [@Mark\_Simulacrum](https://internals.rust-lang.org/u/Mark_Simulacrum)
#### Post date: [July 3, 2019, 6:18pm UTC](https://internals.rust-lang.org/t/rust-1-36-0-pre-release-testing/10490/5 "2019-07-03T18:18:58Z")
HashMap missing the UnwindSafe impl issue should be fixed, and new artifacts have been published; [https://dev-static.rust-lang.org/dist/2019-07-03/index.html](https://dev-static.rust-lang.org/dist/2019-07-03/index.html). I’ve also updated the link in the original post. Thanks for checking the artifacts!
---
### Author:  [@Mark\_Simulacrum](https://internals.rust-lang.org/u/Mark_Simulacrum)
#### Post date: [October 1, 2019, 6:19pm UTC](https://internals.rust-lang.org/t/rust-1-36-0-pre-release-testing/10490/6 "2019-10-01T18:19:37Z")
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