Douglas R. Reno wrote:
On Sun, Nov 13, 2016 at 4:07 PM, Ken Moffat <[email protected]> wrote:
On Sun, Nov 13, 2016 at 12:55:01PM -0600, DJ Lucas wrote:
On Sat, Nov 12, 2016 at 06:56:08PM +0100, Pierre Labastie wrote:

OK, I think I found the culprit: went back to ICU-57.1, compiled FF
against it, and no segfaults for about one hour...

I'll try to find where the ICU API changed.
Pierre

All over the place, 58 has not been pretty for many packages.
This might be a good start:
https://bugzilla.mozilla.org/show_bug.cgi?id=1299615

For the overall changes,
http://source.icu-project.org/repos/icu/icu/tags/release-58-
1/APIChangeReport.html

But like DJ says, it ain't pretty. The page linking to that,
http://site.icu-project.org/download/58#TOC-Common-Changes
summariese these as

API Changes since ICU4C 57

·   The API change report looks large and noisy this time. Most of
     the changes are from the following:
     · The layout engine code was removed, resulting in a long list
       of Removed API.
     · C++ APIs that used const StringPiece& now pass/return
       StringPiece by value. All affected functions show as being
       Removed with their old signature and as Added with their new
       signature. (#12140)
     · Most COUNT and LIMIT enum constants have been deprecated. (#12420)

I'm rebuilding Firefox, Seamonkey, and Thunderbird with ICU-57.1 as we
speak. Probably about 6 hours until I have any news.

If this fixes it, do we need to revert to 57.1?

I would say yes, the revert is needed. We need to keep an eye on it though. If it bothers enough upstream upstream developers, then thy will probably create some compatibility functions.

Usually in this situation though. old APIs are marked deprecated for a while (years) before they are removed.

  -- Bruce

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