Log the name of unsupported fonts

jkseppan · jkseppan · commit d509a90dc89e · 2021-08-21T11:14:25.000+03:00
FT2Font throws RuntimeError for some fonts
diff --git a/lib/matplotlib/backends/_backend_pdf_ps.py b/lib/matplotlib/backends/_backend_pdf_ps.py
@@ -4,6 +4,7 @@
 
 from io import BytesIO
 import functools
+import logging
 
 from fontTools import subset
 
@@ -168,7 +169,13 @@ def _get_font_afm(self, prop):
 
     def _get_font_ttf(self, prop):
         fname = font_manager.findfont(prop)
-        font = font_manager.get_font(fname)
-        font.clear()
-        font.set_size(prop.get_size_in_points(), 72)
-        return font
+        try:
+            font = font_manager.get_font(fname)
+            font.clear()
+            font.set_size(prop.get_size_in_points(), 72)
+            return font
+        except RuntimeError:
+            logging.getLogger(__name__).warning(
+                "The PostScript/PDF backend does not currently "
+                "support the selected font (%s).", fname)
+            raise
diff --git a/lib/matplotlib/backends/backend_ps.py b/lib/matplotlib/backends/backend_ps.py
@@ -234,7 +234,7 @@ def _font_to_ps_type42(font_path, chars, fh):
     except RuntimeError:
         _log.warning(
             "The PostScript backend does not currently "
-            "support the selected font.")
+            "support the selected font (%s).", font_path)
         raise
 
 
