<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=588345) </details> <!--IssueSummary end--> #### How To Reproduce It 1. Enter an invalid codepoint into a file. I achieved this via normal usage: 1. ~~~sh #!/usr/bin/env pwsh run0 dnf5 install --refresh -y konsole-25.12.1-1.fc43.x86_64 && ` konsole --hold -e coredumpctl debug ` --debugger=gdb ` --debugger-arguments="<#-ex 'set pagination off'#> -ex 'thread apply all bt full' -ex quit" ~~~ 1. Select “File”. 1. Select “Save Output As…” 1. Select “HTML” in the resultant `QFileDialog`'s `QComboBox`. 1. Enter an ASCII filename. 1. Select “Save”. 1. Invoke the generated file in `code-1.108.2-1769004860.el8.x86_64`. [^1] [^1]: [`stackoverflow.com/questions/29465612/how-to-detect-invalid-utf8-unicode-binary-in-a-text-file#comment140964373_41741313`](https://stackoverflow.com/questions/29465612/how-to-detect-invalid-utf8-unicode-binary-in-a-text-file#comment140964373_41741313:~:text=For%20me%2C%20even%20LC_ALL=en_US%2EUTF%2D8%20grep%20%2Daxv%20%27%2E*%27%20%22$HOME/%2Ehtml%22%20doesn%27t%20work%20for%20the%20content%20that%20gitlab%2Ecom/gitlab%2Dorg/gitlab/%2D/issues/588345%20describes%2E) 1. Select `.*`. 1. ~~~sh #!/usr/bin/env pwsh wl-paste --primary | wl-copy && ` firefox 'https://gitlab.com/-/snippets/new#source-editor-blob_local_47:~:text=rich%20text%20editing-,Files,-Delete%20file' && \ wl-paste --type text/plain ~~~ #### An Example Project [`gitlab.com/-/snippets/4930079`](https://gitlab.com/-/snippets/4930079) #### The Actual, Erroneous Behaviour I am unable to paste anything past an invalid codepoint, but am not informed, upon submission, that my pasted content has been truncated at that point. #### The Expected Behaviour Instead, I should be able to paste all selected content, then informed whether I want to remove unsubmittable data, upon submission. #### Demonstrative Logs And Media {width=900 height=507} #### GitLab > `18.9.0-pre` `2a4948d27fc` #### My Environment ~~~yaml Name : firefox Version : 147.0.1 Release : 5.fc43 Architecture: x86_64 Install Date: Thu 29 Jan 2026 00:03:08 GMT Size : 270811677 Signature : RSA/SHA256, Tue 27 Jan 2026 19:09:41 GMT, Key ID 829b606631645531 Source RPM : firefox-147.0.1-5.fc43.src.rpm Build Date : Tue 27 Jan 2026 10:25:44 GMT Build Host : buildhw-x86-03.rdu3.fedoraproject.org Packager : Fedora Project Vendor : Fedora Project ~~~ #### Organisation @gitlab-bot label ~"type::bug" @gitlab-bot label ~"reproduced on GitLab.com"