plugin-container crashes with flash-plugin > 28.0.0.161+ firefox 52.6, RHEL6 32 bit

We're in the midst of deploying an update of firefox/flash to 6500 production systems and we are seeing abrt captures of firefox's plugin-container crashing with flash on about 35% of the currently deployed population, several times a day. Apparently it is transparent to the users, as they are not complaining, but we still don't like the idea of multiple application crashes happening regularly.

Platform: RHEL6.9 workstation 32 bit

Browser: firefox-52.6.0

flash-plugin: 28.0.0.161

reproducer page: Adobe - Flash Player   (hit refresh multiple times and you can get it to segfault fairly often)

I went through several iterations today of firefox versions and flash versions and it seems to fail in the same fashion all the way through firefox-52.6.0 and flash-plugin-30.0.0.134. If I go back to our production version of flash-plugin-26.0.0.151, I do not see the segfaults.

I have a case open with RedHat, but they have now sent me to Adobe.

core_backtrace from an abrt capture:

{   "signal": 11

,   "executable": "/usr/lib/firefox/plugin-container"

,   "stacktrace":

      [ {   "crash_thread": true

        ,   "frames":

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                ,   "function_name": "_dl_close"

                ,   "file_name": "/lib/ld-linux.so.2"

                }

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                ,   "build_id": "7d578f69c37d9e6891d442bb76fb9c363ceea631"

                ,   "build_id_offset": 3284

                ,   "function_name": "dlclose_doit"

                ,   "file_name": "/lib/libdl.so.2"

                }

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                ,   "function_name": "_dl_catch_error"

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                ,   "file_name": "/lib/libdl.so.2"

                }

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                ,   "function_name": "dlclose"

                ,   "file_name": "/lib/libdl.so.2"

                }

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