Drag & Drop designer control visibility by expression with field IS NOT NULL doesn't work if the field is configured with html

[tudorbarascu]

What is the bug or the crash?

Using Drag & Drop Designer Control visibility by expression Doesn't work when is based on a html_field IS NOT NULL expression and the html_field widget is configured with the HTML checked like in the image. I've attached a test project. If I untick the HTML option then the rule works as it should and the Bug Group is hidden.

Steps to reproduce the issue

1. Download the attached project
   visibility_by_expression_bug.zip

2. Open the form of the point and you shouldn't see the Bug group as the expression should have hidden it.

3. If you untick the HTML box in the textedit widget it works.

Tried also with master build from source just now.

Versions

<style type="text/css"> p, li { white-space: pre-wrap; } </style>

QGIS version	3.22.3-Białowieża	QGIS code revision	22ecf35
Qt version	5.15.2
Python version	3.9.2
GDAL/OGR version	3.4.1
PROJ version	7.2.1
EPSG Registry database version	v10.008 (2020-12-16)
GEOS version	3.10.2-CAPI-1.16.0
SQLite version	3.34.1
PDAL version	2.2.0
PostgreSQL client version	14.2 (Debian 14.2-1.pgdg110+1)
SpatiaLite version	5.0.1
QWT version	6.1.4
QScintilla2 version	2.11.6
OS version	Debian GNU/Linux 11 (bullseye)
Active Python plugins
pluginbuilder3	3.2.1
wps	3.0.0
slyr_community	3.2.1
Discovery	2.5.7
mask	1.10.1
project_export_inspire	1.0.0
pg_history_viewer	2.2
QNEAT3	1.0.4
LAStools	1.4
qgis_resource_sharing	0.16.0
water_topology_plugin	0.1
water_analytics	0.1
QGIS_Dashboard-master	0.1
plugin_reloader	0.9.1
qtibia_docs_py3	0.1
scriptrunner3	3.0.5
QuickWKT	3.1
searchlayers	3.0.5
trackable_project_files	v1.2.2
db_manager	0.1.20
sagaprovider	2.12.99
processing	2.12.99
grassprovider	2.12.99

QGIS version 3.22.3-Białowieża QGIS code revision [22ecf35](https://github.com/qgis/QGIS/commit/22ecf35491) Qt version 5.15.2 Python version 3.9.2 GDAL/OGR version 3.4.1 PROJ version 7.2.1 EPSG Registry database version v10.008 (2020-12-16) GEOS version 3.10.2-CAPI-1.16.0 SQLite version 3.34.1 PDAL version 2.2.0 PostgreSQL client version 14.2 (Debian 14.2-1.pgdg110+1) SpatiaLite version 5.0.1 QWT version 6.1.4 QScintilla2 version 2.11.6 OS version Debian GNU/Linux 11 (bullseye)

Active Python plugins
pluginbuilder3
3.2.1
wps
3.0.0
slyr_community
3.2.1
Discovery
2.5.7
mask
1.10.1
project_export_inspire
1.0.0
pg_history_viewer
2.2
QNEAT3
1.0.4
LAStools
1.4
qgis_resource_sharing
0.16.0
water_topology_plugin
0.1
water_analytics
0.1
QGIS_Dashboard-master
0.1
plugin_reloader
0.9.1
qtibia_docs_py3
0.1
scriptrunner3
3.0.5
QuickWKT
3.1
searchlayers
3.0.5
trackable_project_files
v1.2.2
db_manager
0.1.20
sagaprovider
2.12.99
processing
2.12.99
grassprovider
2.12.99

Supported QGIS version

• I'm running a supported QGIS version according to the roadmap.

New profile

• I tried with a new QGIS profile

Additional context

No response

[elpaso]

@tudorbarascu just to point out that if you uncheck HTML it does not completely work because there is no way to go back to NULL once you have typed something in the text edit.

[tudorbarascu]

@tudorbarascu just to point out that if you uncheck HTML it does not completely work because there is no way to go back to NULL once you have typed something in the text edit.

Thanks for the info. That's ok.