@@ -1628,6 +1628,11 @@ NB_MODULE(ft2font, m)
 {
     FT_Library ft2Library = nullptr;
 
+    // FT2Font objects are frequently cached via functools.lru_cache.
+    // nanobind's atexit handler can run before these caches are cleared.
+    // This results in leak warnings that are false-positives.
+    nb::set_leak_warnings(false);
+
     if (FT_Init_FreeType(&ft2Library)) {  // initialize library
         throw std::runtime_error("Could not initialize the freetype2 library");
     }
 
@@ -65,6 +65,7 @@ extension_data = {
       '-DFREETYPE_BUILD_TYPE="@0@"'.format(
         freetype_dep.type_name() == 'internal' ? 'local' : 'system',
       ),
+      '-DNB_DOMAIN=matplotlib_ft2font'
     ],
     'link_args': host_machine.system() == 'darwin' ? ['-Wl,-ld_classic'] : [],
   },
Original file line number	Diff line number	Diff line change
`@@ -1628,6 +1628,11 @@ NB_MODULE(ft2font, m)`
`1628`	`1628`	`{`
`1629`	`1629`	`FT_Library ft2Library = nullptr;`
`1630`	`1630`
	`1631`	`+ // FT2Font objects are frequently cached via functools.lru_cache.`
	`1632`	`+ // nanobind's atexit handler can run before these caches are cleared.`
	`1633`	`+ // This results in leak warnings that are false-positives.`
	`1634`	`+ nb::set_leak_warnings(false);`
	`1635`	`+`
`1631`	`1636`	`if (FT_Init_FreeType(&ft2Library)) { // initialize library`
`1632`	`1637`	`throw std::runtime_error("Could not initialize the freetype2 library");`
`1633`	`1638`	`}`