From: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
Date: Thu, 4 Oct 2018 19:26:33 +0000 (-0700)
Subject: bpo-34871: inspect: Don't pollute sys.modules (GH-9696) (#9701)
X-Git-Tag: v3.7.1rc2~33
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=476c294f260ebe1b44157a168c3dfa4a43724ce3;p=thirdparty%2FPython%2Fcpython.git

bpo-34871: inspect: Don't pollute sys.modules (GH-9696) (#9701)

https://bugs.python.org/issue34871
(cherry picked from commit 6f85b826b527e240551613aeec3118a5469e3a33)

Co-authored-by: INADA Naoki <methane@users.noreply.github.com>
---

diff --git a/Lib/inspect.py b/Lib/inspect.py
index 4482b8ea29d5..b5d583ccfd1b 100644
--- a/Lib/inspect.py
+++ b/Lib/inspect.py
@@ -1988,7 +1988,7 @@ def _signature_fromstr(cls, obj, s, skip_bound_arg=True):
         module = sys.modules.get(module_name, None)
         if module:
             module_dict = module.__dict__
-    sys_module_dict = sys.modules
+    sys_module_dict = sys.modules.copy()
 
     def parse_name(node):
         assert isinstance(node, ast.arg)
diff --git a/Misc/NEWS.d/next/Library/2018-10-04-18-46-54.bpo-34871.t3X-dB.rst b/Misc/NEWS.d/next/Library/2018-10-04-18-46-54.bpo-34871.t3X-dB.rst
new file mode 100644
index 000000000000..8cff15671ce5
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2018-10-04-18-46-54.bpo-34871.t3X-dB.rst
@@ -0,0 +1,2 @@
+Fix inspect module polluted ``sys.modules`` when parsing
+``__text_signature__`` of callable.