github.com/lyeb/hugo@v0.47.1/docs/content/en/news/0.36.1-relnotes/index.md (about)

     1  
     2  ---
     3  date: 2018-02-15
     4  title: "Hugo 0.36.1: One Bugfix"
     5  description: "Fixes a multi-thread image processing issue."
     6  categories: ["Releases"]
     7  images:
     8  - images/blog/hugo-bug-poster.png
     9  
    10  ---
    11  	This release fixes a multi-thread issue when reprocessing and reusing images across pages. When doing something like this with the same image from a partial used in, say, both the home page and the single page:
    12  
    13  ```bash
    14  {{ with $img }}
    15  {{ $big := .Fill "1024x512 top" }}
    16  {{ $small := $big.Resize "512x" }}
    17  {{ end }}
    18  ```
    19  
    20  There would be timing issues making Hugo in some cases trying to process the same image twice at the same time.
    21  
    22  You would experience errors of type:
    23  
    24  ```bash
    25  png: invalid format: not enough pixel data
    26  ```
    27  
    28  This commit fixes that by adding a mutex per image. This should also improve the performance, slightly, as it avoids duplicate work.
    29  
    30  The current workaround before this fix is to always operate on the original:
    31  
    32  ```bash
    33  {{ with $img }}
    34  {{ $big := .Fill "1024x512 top" }}
    35  {{ $small := .Fill "512x256 top" }}
    36  {{ end }}
    37  ```
    38  This error was rare (no reports on GitHub or the discussion forum), but very hard to debug for the end user.
    39  
    40  * Fix multi-threaded image processing issue [d8fdffb5](https://github.com/gohugoio/hugo/commit/d8fdffb55268464d54558d6f9cd3874b612dc7c7) [@bep](https://github.com/bep) [#4404](https://github.com/gohugoio/hugo/issues/4404)
    41  * Improve error message in .Render [08521dac](https://github.com/gohugoio/hugo/commit/08521dac8323403933a8fd11acfd16930af5f17d) [@bep](https://github.com/bep) 
    42  * Bump Travis/Snapcraft to Go 1.9.4 [fc23a80f](https://github.com/gohugoio/hugo/commit/fc23a80ffd3878b9ba9a160ce37e0e1d8703faf3) [@bep](https://github.com/bep) 
    43  * Improve error processing error message [2851af02](https://github.com/gohugoio/hugo/commit/2851af0225cdf6c4e47058979cd22949ed6d1fc0) [@bep](https://github.com/bep)