Am 20.01.2020 um 07:13 schrieb Koichi Murase:
Hi, I updated Cygwin from 3.0.7 to 3.1.2 and have two problems. This
is the report for one of them. (For the other one, read(2)
occasionally fails on the new cygwin console for some settings, but
I'm still trying to pin down the issue.)
Cygwin Version:
Cygwin 3.1.2 x86_64 on Windows 10. I also confirmed that the
problem is not fixed with the latest commit 85aff2830 of
newlib-cygwin. Note that Cygwin 3.0.7 doesn't have this problem.
Brief Description:
As in the subject, this problem is caused after some TTY outputs from
programs compiled with "-mwindows". For example, after running the
command "mintty.exe --version" in a terminal, every "exec" called in
the processes in the same session starts to create a console window
which will be closed instantaneously. As results, the display is
always flashing when some scripts are running, the shell scripts
becomes very slow, some of user inputs to the terminal go to the
created window and get lost, and CPU usage extremely increases.
This problem was not present in Cygwin 3.0.7.
Repeat-By:
The following is one example to reproduce it:
1. Open Cygwin Terminal (mintty)
2. Run "mintty --version"
3. Run some shell scripts, e.g., "for i in {0..99}; do date; done | uniq -c"
I can not replicate with latest snapshot
$ uname -a
CYGWIN_NT-10.0 LAPTOP-82F08ILC 3.1.2s(0.340/5/3) 2020-01-14 16:33 x86_64
Cygwin
$ mintty --version
mintty 3.1.0 (x86_64-pc-cygwin)
...
$ for i in {0..99}; do date; done | uniq -c
6 Mon, Jan 20, 2020 8:15:49 AM
18 Mon, Jan 20, 2020 8:15:50 AM
19 Mon, Jan 20, 2020 8:15:51 AM
16 Mon, Jan 20, 2020 8:15:52 AM
20 Mon, Jan 20, 2020 8:15:53 AM
21 Mon, Jan 20, 2020 8:15:54 AM
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