Merged upstream changes.

Lib/venv/__init__.py

@@ -305,8 +305,14 @@ class EnvBuilder:
                     mode = 'wb'
                 else:
                     mode = 'w'
+                    try:
                         data = data.decode('utf-8')
                         data = self.replace_variables(data, context)
+                    except UnicodeDecodeError as e:
+                        data = None
+                        logger.warning('unable to copy script %r, '
+                                       'may be binary: %s', srcfile, e)
+                if data is not None:
                     with open(dstfile, mode) as f:
                         f.write(data)
                     shutil.copymode(srcfile, dstfile)