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progress: retry ferr.flush() and .write() on EINTR (issue5532)...

progress: retry ferr.flush() and .write() on EINTR (issue5532) See the inline comment how this could mitigate the issue. I couldn't reproduce the exact problem on my Linux machine, but there are at least two people who got EINTR in progress.py, and it seems file_write() of Python 2 is fundamentally broken [1]. Let's make something in on 4.2. [1]: https://hg.python.org/cpython/file/v2.7.13/Objects/fileobject.c#l1850

Matt Mackall - - Load All Authors

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      https://bz.mercurial-scm.org/842

        $ hg init

        $ echo foo > a

        $ hg ci -Ama

        adding a

        $ hg up -r0000

        0 files updated, 0 files merged, 1 files removed, 0 files unresolved

        $ echo bar > a

      Should issue new head warning:

        $ hg ci -Amb

        adding a

        created new head

        $ hg up -r0000

        0 files updated, 0 files merged, 1 files removed, 0 files unresolved

        $ echo stuffy > a

      Should not issue new head warning:

        $ hg ci -q -Amc

        $ hg up -r0000

        0 files updated, 0 files merged, 1 files removed, 0 files unresolved

        $ echo crap > a

        $ hg branch testing

        marked working directory as branch testing

        (branches are permanent and global, did you want a bookmark?)

      Should not issue warning:

        $ hg ci -q -Amd

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				https://bz.mercurial-scm.org/842

				$ hg init
				$ echo foo > a
				$ hg ci -Ama
				adding a

				$ hg up -r0000
				0 files updated, 0 files merged, 1 files removed, 0 files unresolved

				$ echo bar > a

				Should issue new head warning:

				$ hg ci -Amb
				adding a
				created new head

				$ hg up -r0000
				0 files updated, 0 files merged, 1 files removed, 0 files unresolved

				$ echo stuffy > a

				Should not issue new head warning:

				$ hg ci -q -Amc

				$ hg up -r0000
				0 files updated, 0 files merged, 1 files removed, 0 files unresolved

				$ echo crap > a
				$ hg branch testing
				marked working directory as branch testing
				(branches are permanent and global, did you want a bookmark?)

				Should not issue warning:

				$ hg ci -q -Amd