Fix `raises(..., "code(string)")` frame filename.

changelog/4435.bugfix.rst

@@ -0,0 +1 @@
+Fix ``raises(..., 'code(string)')`` frame filename.

src/_pytest/python_api.py

@@ -679,7 +679,7 @@ def raises(expected_exception, *args, **kwargs):
         loc.update(kwargs)
         # print "raises frame scope: %r" % frame.f_locals
         try:
-            code = _pytest._code.Source(code).compile()
+            code = _pytest._code.Source(code).compile(_genframe=frame)
             six.exec_(code, frame.f_globals, loc)
             # XXX didn't mean f_globals == f_locals something special?
             #     this is destroyed here ...

testing/python/raises.py

@@ -17,6 +17,10 @@ class TestRaises(object):
     def test_raises_exec(self):
         pytest.raises(ValueError, "a,x = []")
 
+    def test_raises_exec_correct_filename(self):
+        excinfo = pytest.raises(ValueError, 'int("s")')
+        assert __file__ in excinfo.traceback[-1].path
+
     def test_raises_syntax_error(self):
         pytest.raises(SyntaxError, "qwe qwe qwe")