Fix AttributeError when saving figure with partial Latex elements as a postscript (issue 7741)

lib/matplotlib/axes/_axes.py

@@ -635,7 +635,7 @@ def text(self, x, y, s, fontdict=None,
                 x=x, y=y, text=s)
         else:
             t = mtext.Text(
-                x=x, y=y, text=s)
+                x=x, y=y, text=s, usetex=kwargs.get('usetex'))
 
         t.update(default)
         if fontdict is not None:

lib/matplotlib/tests/test_backend_ps.py

@@ -188,3 +188,12 @@ def test_determinism_all():
 def test_determinism_all_tex():
     """Test for reproducible PS/tex output"""
     _determinism_check(format="ps", usetex=True)
+
+
+@needs_tex
+def test_usetex_param():
+    """Test for Issue #7741 (this shouldn't crash)"""
+    fig = plt.figure()
+    plt.text(0.5, 0.5, 'some text, $math mode$',
+             ha='center', va='center', usetex=True)
+    fig.savefig('test.ps')

lib/matplotlib/text.py

@@ -1261,6 +1261,7 @@ def set_usetex(self, usetex):
             self._usetex = rcParams['text.usetex']
         else:
             self._usetex = bool(usetex)
+        rcParams['text.usetex'] = self._usetex
         self.stale = True
 
     def get_usetex(self):