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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Nonblocking read sys.stdin raises error","articleBody":"BPO | [36293](https://bugs.python.org/issue36293)\n--- | :---\nNosy | @terryjreedy, @vstinner, @ezio-melotti, @vadmium, @cykerway\nSuperseder | \u003cli\u003ebpo-35762: subprocess.Popen with universal_newlines and nonblocking streams fails with \u0026quot;can\u0026#x27;t concat NoneType to bytes\u0026quot;\u003c/li\u003e\n\n\u003csup\u003e*Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.*\u003c/sup\u003e\n\n\u003cdetails\u003e\u003csummary\u003eShow more details\u003c/summary\u003e\u003cp\u003e\n\nGitHub fields:\n```python\nassignee = None\nclosed_at = \u003cDate 2019-03-31.01:12:56.770\u003e\ncreated_at = \u003cDate 2019-03-14.15:50:35.532\u003e\nlabels = ['3.7', 'library', 'expert-unicode']\ntitle = 'Nonblocking read sys.stdin raises error'\nupdated_at = \u003cDate 2019-03-31.01:13:11.716\u003e\nuser = 'https://github.com/cykerway'\n```\n\nbugs.python.org fields:\n```python\nactivity = \u003cDate 2019-03-31.01:13:11.716\u003e\nactor = 'martin.panter'\nassignee = 'none'\nclosed = True\nclosed_date = \u003cDate 2019-03-31.01:12:56.770\u003e\ncloser = 'martin.panter'\ncomponents = ['Library (Lib)', 'Unicode']\ncreation = \u003cDate 2019-03-14.15:50:35.532\u003e\ncreator = 'cykerway'\ndependencies = []\nfiles = []\nhgrepos = []\nissue_num = 36293\nkeywords = []\nmessage_count = 4.0\nmessages = ['337940', '337972', '338015', '339236']\nnosy_count = 5.0\nnosy_names = ['terry.reedy', 'vstinner', 'ezio.melotti', 'martin.panter', 'cykerway']\npr_nums = []\npriority = 'normal'\nresolution = 'duplicate'\nstage = 'resolved'\nstatus = 'closed'\nsuperseder = '35762'\ntype = None\nurl = 'https://bugs.python.org/issue36293'\nversions = ['Python 3.7']\n```\n\n\u003c/p\u003e\u003c/details\u003e\n","author":{"url":"https://github.com/cykerway","@type":"Person","name":"cykerway"},"datePublished":"2019-03-14T15:50:36.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/80474/cpython/issues/80474"}