jojo/modules/markup/markdown
Mathieu Fenniak bc7c8e3c84 fix: markdown rendering panic when code blocks do not have languages (#12325)
When attempting to render a markdown code block that does not have a language set in it, Forgejo will fail to render and log an error:
```
2026/04/29 08:47:47 ...markdown/markdown.go:162:func1() [W] Unable to render markdown due to panic in goldmark: runtime error: invalid memory address or nil pointer dereference
```

This is a regression introduced by #12056.

## Checklist

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### Tests for Go changes

- I added test coverage for Go changes...
  - [x] in their respective `*_test.go` for unit tests.
  - [ ] in the `tests/integration` directory if it involves interactions with a live Forgejo server.
- I ran...
  - [x] `make pr-go` before pushing

### Documentation

- [ ] I created a pull request [to the documentation](https://codeberg.org/forgejo/docs) to explain to Forgejo users how to use this change.
- [x] I did not document these changes and I do not expect someone else to do it.

### Release notes

- [ ] This change will be noticed by a Forgejo user or admin (feature, bug fix, performance, etc.). I suggest to include a release note for this change.
- [x] This change is not visible to a Forgejo user or admin (refactor, dependency upgrade, etc.). I think there is no need to add a release note for this change.
    - pre-release regression

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/12325
Reviewed-by: Gusted <gusted@noreply.codeberg.org>
2026-04-29 19:49:55 +02:00
..
callout chore: branding import path (#7337) 2025-03-27 19:40:14 +00:00
math chore: add modernizer linter (#11936) 2026-04-02 03:29:37 +02:00
util fix: enable multi-line math equations in wiki (#8424) 2025-07-06 22:00:09 +02:00
ast.go chore: Remove IsXXX 2025-01-31 16:22:29 +01:00
color_util.go feat: support color dots for 4 character hex. 2024-11-02 13:37:14 +01:00
color_util_test.go feat: support color dots for 4 character hex. 2024-11-02 13:37:14 +01:00
convertyaml.go chore: replace gopkg.in/yaml.v3 with go.yaml.in/yaml/v3 (#8956) 2025-08-20 15:31:12 +02:00
goldmark.go feat(ui): Fix comma separated attributes in code blocks language preventing syntax-highlighting (#12056) 2026-04-12 18:30:30 +02:00
markdown.go chore: add modernizer linter (#11936) 2026-04-02 03:29:37 +02:00
markdown_test.go fix: markdown rendering panic when code blocks do not have languages (#12325) 2026-04-29 19:49:55 +02:00
meta.go chore: replace gopkg.in/yaml.v3 with go.yaml.in/yaml/v3 (#8956) 2025-08-20 15:31:12 +02:00
meta_test.go chore: add modernizer linter (#11936) 2026-04-02 03:29:37 +02:00
prefixed_id.go chore: branding import path (#7337) 2025-03-27 19:40:14 +00:00
renderconfig.go chore: replace gopkg.in/yaml.v3 with go.yaml.in/yaml/v3 (#8956) 2025-08-20 15:31:12 +02:00
renderconfig_test.go chore: replace gopkg.in/yaml.v3 with go.yaml.in/yaml/v3 (#8956) 2025-08-20 15:31:12 +02:00
toc.go chore: add modernizer linter (#11936) 2026-04-02 03:29:37 +02:00
transform_codeblock_lang.go fix: markdown rendering panic when code blocks do not have languages (#12325) 2026-04-29 19:49:55 +02:00
transform_codespan.go Update module github.com/golangci/golangci-lint/cmd/golangci-lint to v2 (forgejo) (#7367) 2025-03-28 22:22:21 +00:00
transform_heading.go chore: add modernizer linter (#11936) 2026-04-02 03:29:37 +02:00
transform_html.go Add to html button in markdown type="button" (#10520) 2025-12-21 05:21:27 +01:00
transform_image.go fix(ui): add missing lazy load attribute to images (#8246) 2025-06-25 18:31:03 +02:00
transform_link.go chore: branding import path (#7337) 2025-03-27 19:40:14 +00:00
transform_list.go chore: branding import path (#7337) 2025-03-27 19:40:14 +00:00