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matplotlib__matplotlib-22835

Based on the issue description and the hints provided, I can construct the patch. The issue is in lib/matplotlib/artist.py in the format_cursor_data method where self.norm.inverse() is called, but BoundaryNorm raises a ValueError because…

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Based on the issue description and the hints provided, I can construct the patch. The issue is in `lib/matplotlib/artist.py` in the `format_cursor_data` method where `self.norm.inverse()` is called, but `BoundaryNorm` raises a `ValueError` because it's not invertible.

The recommended fix from the discussion is to:
1. Use a try-except block to catch the ValueError when inverse() fails
2. For BoundaryNorm specifically, use its boundaries to determine the neighbors

Let me create the patch based on the information provided:

```
--- a/lib/matplotlib/artist.py
+++ b/lib/matplotlib/artist.py
@@ -1

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