commit 8a9d74e955c9e66e23ca423181d6b4f3b2f35234
merge: 69071b279955ab8dd08fad10b2540b9f6bae2825 efd33904df73f0175583058fedc0d7234cac6b45
author: orivej
date: 2019-07-06T14:14:55+03:00
revision: 5216942

    Fix tracebacks in py2 import_test and do not read builtin source from FS. DEVTOOLS-5629
    
    REVIEW: 869505
    Note: mandatory check (NEED_CHECK) was skipped

--- contrib/tools/python3/Lib/linecache.py	(69071b279955ab8dd08fad10b2540b9f6bae2825)
+++ contrib/tools/python3/Lib/linecache.py	(8a9d74e955c9e66e23ca423181d6b4f3b2f35234)
@@ -88,6 +88,18 @@ def updatecache(filename, module_globals=None):
     if not filename or (filename.startswith('<') and filename.endswith('>')):
         return []
 
+    if not os.path.isabs(filename):
+        # Do not read builtin code from the filesystem.
+        import __res
+
+        key = __res.py_src_key(filename)
+        if data := __res.resfs_read(key):
+            assert data is not None, filename
+            data = data.decode('UTF-8')
+            lines = [line + '\n' for line in data.splitlines()]
+            cache[filename] = (len(data), None, lines, filename)
+            return cache[filename][2]
+
     fullname = filename
     try:
         stat = os.stat(fullname)