Generalise .so file regex even further as the platform suffix of extension...

Generalise .so file regex even further as the platform suffix of extension modules can be arbitrarily complex in Py3.5+.

CHANGES.rst

@@ -41,6 +41,8 @@ Bugs fixed
 * Cython annotation types in Python files could lead to import failures
   with a "cython undefined" error.  Recognised types are now turned into strings.
 
+* Coverage analysis could fail to report on extension modules on some platforms.
+
 * Annotations could be parsed (and rejected) as types even with
   ``annotation_typing=False``.
 

Cython/Coverage.py

@@ -113,7 +113,7 @@ class Plugin(CoveragePlugin):
                 basename = basename[:platform_suffix.start()]
         elif ext == '.so':
             # Linux/Unix/Mac extension module
-            platform_suffix = re.search(r'[.]cpython-[0-9]+[a-z]*(?:-[a-z0-9]+)?$', basename, re.I)
+            platform_suffix = re.search(r'[.]cpython-[0-9]+[-_a-z0-9]*$', basename, re.I)
             if platform_suffix:
                 basename = basename[:platform_suffix.start()]
         elif ext == '.pxi':