ImageMagick 'convert' program broken, error in cyggs-9.dll x86_64/release/ghostscript/libgs9/libgs9-9.27-1.tar.xz

[Keith Christian <keith1christian at gmail dot com>]

Strace shows this in a dialog box when it fails:
        The procedure entry point uname_x could not be located in the
dynamic link library C:\cygwin64\bin\cyggs-9dll.


Version info:
        $ uname -a
        CYGWIN_NT-10.0 DESKTOP-OLN71TE 2.11.2(0.329/5/3) 2018-11-08
14:34 x86_64 Cygwin

        $ /lib/csih/winProductName.exe
        Microsoft Windows 10 Professional, 64-bit (build 17763)

         Cygwin 'setup' version is 2.897 64 bit

I updated cygwin64 on 8 Jun.  Afterward, using 'convert' to create a
pdf from a jpg file fails, it worked before.

'convert' appeared not to run when trying convert somefile.jpg
somefile.pdf, so I ran strace and here is a part of the output:

$ strace /usr/bin/convert.exe
        --- Process 43956 created
        --- Process 43956 loaded C:\Windows\System32\ntdll.dll at
00007fff10b60000
        --- Process 43956 loaded C:\Windows\System32\kernel32.dll at
00007fff10a70000
        --- Process 43956 loaded C:\Windows\System32\KernelBase.dll at
00007fff0da80000
        --- Process 43956 thread 64252 created
        --- Process 43956 thread 64672 created
        --- Process 43956 thread 57620 created
        --- Process 43956 loaded
C:\cygwin64\bin\cygMagickWand-6.Q16-6.dll at 00000003ef010000
        --- Process 43956 loaded C:\cygwin64\bin\cygwin1.dll at 0000000180040000
        --- Process 43956 loaded
C:\cygwin64\bin\cygMagickCore-6.Q16-6.dll at 00000003ef3a0000

An exception shows in the strace output before convert fails:
        --- Process 43956 loaded C:\cygwin64\bin\cyggmodule-2.0-0.dll
at 0000000000020000
        --- Process 43956 unloaded DLL at 0000000000020000
        --- Process 43956 loaded C:\cygwin64\bin\cyggraphite2-3.dll at
00000003c0e40000
        --- Process 43956 loaded C:\cygwin64\bin\cyguuid-1.dll at
000000037fcc0000
        --- Process 43956, exception c0000139 at 00007fff10bfeb78
        --- Process 43956 thread 57620 exited with status 0xc0000139
        --- Process 43956 thread 64252 exited with status 0xc0000139
        --- Process 43956 thread 60540 exited with status 0xc0000139
        --- Process 43956 exited with status 0xc0000139


I've removed and reinstalled ImageMagick a few times and that does not
fix the problem.

Help appreciated!

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