Towards fixing a 3.8 try except-as bug

admin-tools/how-to-make-a-release.md

@@ -2,17 +2,17 @@
 **Table of Contents**
 
 - [Get latest sources:](#get-latest-sources)
-- [Change version in uncompyle6/version.py](#change-version-in-uncompyle6versionpy)
+- [Change version in uncompyle6/version.py:](#change-version-in-uncompyle6versionpy)
 - [Update ChangeLog:](#update-changelog)
-- [Update NEWS from ChangeLog:](#update-news-from-changelog)
+- [Update NEWS.md from ChangeLog:](#update-newsmd-from-changelog)
 - [Make sure pyenv is running and check newer versions](#make-sure-pyenv-is-running-and-check-newer-versions)
 - [Switch to python-2.4, sync that up and build that first since it creates a tarball which we don't want.](#switch-to-python-24-sync-that-up-and-build-that-first-since-it-creates-a-tarball-which-we-dont-want)
-- [Update NEWS from master branch](#update-news-from-master-branch)
-- [Check against all versions](#check-against-all-versions)
+- [Check against older versions](#check-against-older-versions)
 - [Make packages and tag](#make-packages-and-tag)
-- [Upload single package and look at Rst Formating](#upload-single-package-and-look-at-rst-formating)
-- [Upload rest of versions](#upload-rest-of-versions)
-- [Push tags:](#push-tags)
+- [Check package on github](#check-package-on-github)
+- [Release on Github](#release-on-github)
+- [Get onto PyPI](#get-onto-pypi)
+- [Update tags:](#update-tags)
 
 <!-- markdown-toc end -->
 # Get latest sources:
@@ -84,25 +84,12 @@ Todo: turn this into a script in `admin-tools`
 	$ popd
 
 
-# Upload single package and look at Rst Formating
-
-	$ twine check dist/uncompyle6-${VERSION}*
-
-# Upload rest of versions
+# Get onto PyPI
 
     $ twine upload dist/uncompyle6-${VERSION}*
 
 
-# Push tags:
+# Update tags:
 
     $ git push --tags
-
-# Check on a VM
-
-    $ cd /virtual/vagrant/virtual/vagrant/ubuntu-zesty
-	$ vagrant up
-	$ vagrant ssh
-	$ pyenv local 3.5.2
-	$ pip install --upgrade uncompyle6
-	$ exit
-	$ vagrant halt
+    $ git pull --tags

uncompyle6/parsers/parse38.py

@@ -45,6 +45,7 @@ class Python38Parser(Python37Parser):
         stmt               ::= try_elsestmtl38
         stmt               ::= try_except_ret38
         stmt               ::= try_except38
+        stmt               ::= try_except_as
         stmt               ::= whilestmt38
         stmt               ::= whileTruestmt38
         stmt               ::= call_stmt
@@ -133,6 +134,8 @@ class Python38Parser(Python37Parser):
         except_cond1       ::= DUP_TOP expr COMPARE_OP jmp_false
                                POP_TOP POP_TOP POP_TOP
                                POP_EXCEPT
+        except_cond_as     ::= DUP_TOP expr COMPARE_OP POP_JUMP_IF_FALSE
+                               POP_TOP STORE_FAST POP_TOP
 
         try_elsestmtl38    ::= SETUP_FINALLY suite_stmts_opt POP_BLOCK
                                except_handler38 COME_FROM
@@ -145,6 +148,10 @@ class Python38Parser(Python37Parser):
         # suite_stmts has a return
         try_except38       ::= SETUP_FINALLY POP_BLOCK suite_stmts
                                except_handler38b
+        try_except_as      ::= SETUP_FINALLY POP_BLOCK suite_stmts
+                               except_handler_as END_FINALLY COME_FROM
+        try_except_as      ::= SETUP_FINALLY suite_stmts
+                               except_handler_as END_FINALLY COME_FROM
 
         try_except_ret38   ::= SETUP_FINALLY returns except_ret38a
         try_except_ret38a  ::= SETUP_FINALLY returns except_handler38c
@@ -165,6 +172,11 @@ class Python38Parser(Python37Parser):
         except_handler38a  ::= COME_FROM_FINALLY POP_TOP POP_TOP POP_TOP
                                POP_EXCEPT POP_TOP stmts END_FINALLY
 
+        except_handler38c  ::= COME_FROM_FINALLY except_cond1a except_stmts
+                               POP_EXCEPT JUMP_FORWARD COME_FROM
+        except_handler_as  ::= COME_FROM_FINALLY except_cond_as tryfinallystmt
+                               POP_EXCEPT JUMP_FORWARD COME_FROM
+
         tryfinallystmt     ::= SETUP_FINALLY suite_stmts_opt POP_BLOCK
                                BEGIN_FINALLY COME_FROM_FINALLY suite_stmts_opt
                                END_FINALLY

uncompyle6/semantics/customize38.py

@@ -50,12 +50,24 @@ def customize_for_version38(self, version):
             "%|%c\n", 0
         ),
 
+        "except_cond_as": (
+            "%|except %c as %c:\n",
+            (1, "expr"),
+            (-2, "STORE_FAST"),
+            ),
+
         'except_handler38': (
             '%c', (2, 'except_stmts') ),
 
         'except_handler38a': (
             '%c', (-2, 'stmts') ),
 
+        "except_handler_as": (
+            "%c%+\n%+%c%-",
+            (1, "except_cond_as"),
+            (2, "tryfinallystmt"),
+        ),
+
         'except_ret38a': (
             'return %c', (4, 'expr') ),
 
@@ -105,6 +117,13 @@ def customize_for_version38(self, version):
         'try_except38': (
             '%|try:\n%+%c\n%-%|except:\n%|%-%c\n\n',
                    (-2, 'suite_stmts_opt'), (-1, 'except_handler38a') ),
+
+        "try_except_as": (
+            "%|try:\n%+%c%-\n%|%-%c\n\n",
+            (-4, "suite_stmts"),  # Go from the end because of POP_BLOCK variation
+            (-3, "except_handler_as"),
+        ),
+
         "try_except_ret38": (
             "%|try:\n%+%c%-\n%|except:\n%+%|%c%-\n\n",
             (1, "returns"),