On 7/26/17 22:49, Andrew Dunstan wrote:
> Work around Msys weakness in Testlib.pm's command_like()
> 
> When output of IPC::Run::run () is redirected to scalar references, in
> certain circumstances the Msys perl does not correctly detect that the
> end of file has been seen, making the test hang indefinitely. One such
> circumstance is when the command is 'pg_ctl start', and such a change
> was made in commit f13ea95f9e. The workaround, which only applies on
> MSys, is to redirect the output to temporary files and then read them in
> when the process has finished.

This commit message contains interesting information that would be
useful to record in a code comment.  Otherwise it's not really clear
when or why to use the "safe" variant.

-- 
Peter Eisentraut              http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services


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