#20884: line buffering in sage-logger causes "hang" due to invisible prompt when
installing experimental packages
-------------------------------------+-------------------------------------
       Reporter:  mkoeppe            |        Owner:
           Type:  defect             |       Status:  needs_work
       Priority:  critical           |    Milestone:  sage-7.3
      Component:  build              |   Resolution:
       Keywords:                     |    Merged in:
        Authors:  Erik Bray          |    Reviewers:  Dima Pasechnik,
                                     |  Matthias Koeppe
Report Upstream:  N/A                |  Work issues:
         Branch:  u/embray/disable-  |       Commit:
  exp-pkg-prompt                     |  0fc8fde498193be273b22ec69e5e97a67caa0dc0
   Dependencies:                     |     Stopgaps:
-------------------------------------+-------------------------------------
Changes (by vbraun):

 * status:  positive_review => needs_work


Comment:

 I'm getting this failure
 {{{
 sage -t --long src/sage/tests/cmdline.py
 **********************************************************************
 File "src/sage/tests/cmdline.py", line 219, in
 sage.tests.cmdline.test_executable
 Failed example:
     print(out)
 Expected:
     Found local metadata for sqlite-...
     = SQLite =
     ...
     SQLite is a software library that implements a self-contained,
     serverless, zero-configuration, transactional SQL database engine.
     ...
 Got:
     Found local metadata for sqliteautoconf3130000
     = SQLite =
     <BLANKLINE>
     == Description ==
     <BLANKLINE>
     SQLite is a software library that implements a selfcontained,
     serverless, zeroconfiguration, transactional SQL database engine.
     <BLANKLINE>
     == License ==
     <BLANKLINE>
     Public Domain
     <BLANKLINE>
     == Upstream contact ==
     <BLANKLINE>
      * http://www.sqlite.org
     <BLANKLINE>
     == Dependencies ==
     <BLANKLINE>
     * readline
     <BLANKLINE>
     == Special Update/Build Instructions ==
     <BLANKLINE>
     * Use the autoconf version of sqlite.
     <BLANKLINE>
 **********************************************************************
 1 item had failures:
    1 of 239 in sage.tests.cmdline.test_executable
     [238 tests, 1 failure, 142.30 s]
 }}}

--
Ticket URL: <https://trac.sagemath.org/ticket/20884#comment:34>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
and MATLAB

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