Diagrams: histograms with only negative values don't render #63980
Description
What is the bug or the crash?
When using histograms (diagrams), the bars do not render when there are only negative values defining the bars.
In the given project, in layer "beventwickl_szen_diag_tief_szen_bevtotal_endejahr_2055" the histograms for points with ids 14 (Schaffhausen) and 24 (Neuchâtel) do not render because they have only negative values.
I would expect all histograms to render correctly, regardless if there are only positive, only negative or mixed numbers.
diagram_issue_negative_values.zip
Steps to reproduce the issue
- open the project
- open the layer properties of layer "beventwickl_szen_diag_tief_szen_bevtotal_endejahr_2055" to check the diagram (histogram) settings
- check the rendering: note that two points (with ids 14 and 24) show no histograms
The values for the histogram (ids 14 and 24) only contain negative values:
Versions
| QGIS version | 3.44.4-Solothurn |
| QGIS code revision | 108203c541e |
| Libraries | |
| Qt version | 5.15.13 |
| Python version | 3.12.11 (Compiled) 3.12.12 (Running) |
| GDAL version | 3.11.4 (Compiled) 3.11.5 (Running) — Eganville |
| PROJ version | 9.7.0 |
| EPSG Registry database version | v12.022 (2025-08-30) |
| GEOS version | 3.13.1-CAPI-1.19.2 |
| SQLite version | 3.50.4 |
| PDAL version | 2.9.0 |
| PostgreSQL client version | 17.3 |
| SpatiaLite version | 5.1.0 |
| QWT version | 6.3.0 |
| QScintilla2 version | 2.14.1 |
| OS version | Windows 11 Version 2009 |
| Active Python plugins | |
| linking_relation_editor | v1.4.0 |
| quick_map_services | 0.21.4 |
| swiss_locator | 4.0.1 |
| db_manager | 0.1.20 |
| grassprovider | 2.12.99 |
| processing | 2.12.99 |
| aps-editor | 3.5.3 |
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