Fix parser bug

Fixes #587.

Author: JukkaL

mypy/parse.py

@@ -182,6 +182,8 @@ def parse_import_from(self) -> Node:
         self.expect('import')
         node = None  # type: ImportBase
         if self.current_str() == '*':
+            if name == '__future__':
+                self.parse_error()
             # An import all from a module node:
             self.skip()
             node = ImportAll(name, relative)

mypy/test/data/parse-errors.test

@@ -396,3 +396,9 @@ file, line 1: Parse error before "for"
 a = a...
 [out]
 file, line 1: Parse error before ...
+
+[case testFromFutureImportStar]
+from __future__ import *
+x = 1
+[out]
+file, line 1: Parse error before *