newlib/winsup/cygwin/release/1.7.28

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What changed:
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Bug Fixes
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- Signals should no longer hang when they occur within a low-level
Windows DLL.
Fixes: http://cygwin.com/ml/cygwin/2013-12/threads.html#00151
- If it turns out that transactions don't work during unlink(2) or rename(2),
despite the fact that the filesystem claims to handle them, stop transaction
and try again without.
Fixes: http://cygwin.com/ml/cygwin/2013-12/msg00119.html
- Closing a dup'ed master tty handle should no longer invalidate the dup'ed fd.
Fixes: http://cygwin.com/ml/cygwin/2013-12/threads.html#00279
- Problems where ps hangs when used in a pipeline should now be solved.
Fixes: http://cygwin.com/ml/cygwin/2013-12/threads.html#00262
- Using gdb from a Windows console rather than a pty should no longer randomly
hang.
- Fix locale-specific radix char handling in scanf family of functions.
Fixes: http://cygwin.com/ml/cygwin/2013-12/msg00294.html
- The console buffer should no longer be cleared when the resolution of the
console exceeds some magic threshold.
Fixes: http://cygwin.com/ml/cygwin/2013-12/threads.html#00406
- Fix inadvertent clearing of entire console buffer on clear screen.
See: http://cygwin.com/ml/cygwin/2014-01/msg00011.html
- Make sure that stackdump file is closed after use.
See: http://cygwin.com/ml/cygwin/2014-01/threads.html#00029