# ChangeLog for yesod-core
## 1.6.23.1
* Fix typo in creation of the description `` tag in `defaultLayout`. [#1766](https://github.com/yesodweb/yesod/pull/1766)
## 1.6.23
* Add idempotent versions of `setDescription`, `setDescriptionI`. These functions
have odd behaviour when called multiple times, so they are now warned against.
This can't be a silent change - if you want to switch to the new functions, make
sure your layouts are updated to use `pageDescription` as well as `pageTitle`.
[#1765](https://github.com/yesodweb/yesod/pull/1765)
## 1.6.22.1
+ Remove sometimes failing superfluous test. [#1756](https://github.com/yesodweb/yesod/pull/1756)
## 1.6.22.0
* Add missing list to documentation for ``Yesod.Core.Dispatch.warp``. [#1745](https://github.com/yesodweb/yesod/pull/1745)
* Add instances for `ToContent Void`, `ToTypedContent Void`. [#1752](https://github.com/yesodweb/yesod/pull/1752)
* Handle async exceptions within yesod rather then warp. [#1753](https://github.com/yesodweb/yesod/pull/1753)
* Support template-haskell 2.18 [#1754](https://github.com/yesodweb/yesod/pull/1754)
## 1.6.21.0
* Export `Yesod.Core.Dispatch.defaultGen` so that users may reuse it for their own `YesodRunnerEnv`s [#1734](https://github.com/yesodweb/yesod/pull/1734)
## 1.6.20.2
* Fix compatibility with template-haskell 2.17 [#1729](https://github.com/yesodweb/yesod/pull/1729)
## 1.6.20.1
* Throw an error in `breadcrumbs` if the trail of breadcrumbs is circular. [#1727](https://github.com/yesodweb/yesod/issues/1727)
## 1.6.20
* Generate CSRF tokens using a secure entropy source [#1726](https://github.com/yesodweb/yesod/pull/1726)
* Change semantics of `yreGen` and `defaultGen`
## 1.6.19.0
* Change order of priority in `languages`[#1721](https://github.com/yesodweb/yesod/pull/1721)
## 1.6.18.8
* Fix test suite for wai-extra change around vary header
## 1.6.18.7
* Fix functions generating Open Graph metadata[#1709](https://github.com/yesodweb/yesod/pull/1709)
## 1.6.18.6
* Update documentation from `HandlerT` to `HandlerFor` [#1703](https://github.com/yesodweb/yesod/pull/1703)
## 1.6.18.5
Document `ErrorResponse` [#1698](https://github.com/yesodweb/yesod/pull/1698)
## 1.6.18.4
* Fixed a bug where `mkYesod` and other TH functions didn't work for datatypes with explicitly stated type variables, including the case with typeclass constraints. [https://github.com/yesodweb/yesod/pull/1697](#1697)
## 1.6.18.3
* Remove mention of an oudated Yesod type (`GHandler`) from the docs for `handlerToIO`. [https://github.com/yesodweb/yesod/pull/1695](#1695)
## 1.6.18.2
* Recommends `.yesodroutes` as the file extension for Yesod routes files. [#1686](https://github.com/yesodweb/yesod/pull/1686)
## 1.6.18.1
* Increase the size of CSRF token
## 1.6.18
* Add functions for setting description and OG meta [#1663](https://github.com/yesodweb/yesod/pull/1663)
* Use `DeriveLift` to implement the `Lift` instances for `ResourceTree`,
`Resource`, `Piece`, and `Dispatch`. Among other benefits, this provides
implementations of `liftTyped` on `template-haskell-2.16` (GHC 8.10) or
later. [#1664](https://github.com/yesodweb/yesod/pull/1664)
## 1.6.17.3
* Support for `unliftio-core` 0.2
## 1.6.17.2
* Support template-haskell 2.16, build with GHC 8.10 [#1657](https://github.com/yesodweb/yesod/pull/1657)
## 1.6.17.1
* Remove unnecessary deriving of Typeable
## 1.6.17
* Adds `contentTypeIsJson` [#1646](https://github.com/yesodweb/yesod/pull/1646)
## 1.6.16.1
* Compiles with GHC 8.8.1
## 1.6.16
* Add `jsAttributesHandler` to run arbitrary Handler code before building the
attributes map for the script tag generated by `widgetFile` [#1622](https://github.com/yesodweb/yesod/pull/1622)
## 1.6.15
* Move `redirectToPost` JavaScript form submission from HTML element to
`