$ hexdump -C core_3291.snap > good
$ hexdump -C core_3291.snap.popey > bad
$ diff -u bad good
--- bad	2017-10-26 14:45:22.381848717 +0200
+++ good	2017-10-26 14:45:03.081945939 +0200
@@ -927742,7 +927742,7 @@
 00e27fd0  95 f3 b3 8a b2 fb 39 87  4c 1b bf 79 91 53 f7 17  |......9.L..y.S..|
 00e27fe0  76 b0 02 a8 6c 13 56 1d  61 fe d1 ca 19 95 d9 96  |v...l.V.a.......|
 00e27ff0  3a 23 87 85 f6 b4 3f 1d  e1 cf a0 26 df 6d 09 3e  |:#....?....&.m.>|
-00e28000  18 17 10 00 6b 6b 29 42  09 a0 f0 17 c6 fc 4d 98  |....kk)B......M.|
+00e28000  bd ff 9b a0 6b 6b 29 42  09 a0 f0 17 c6 fc 4d 98  |....kk)B......M.|
 00e28010  03 0d 8e 36 12 2a e5 cd  e0 fd 76 6a 31 c7 74 99  |...6.*....vj1.t.|
 00e28020  91 7f 4f ea b1 c7 5d 4a  3b 6b b5 2f 43 98 2e 67  |..O...]J;k./C..g|
 00e28030  aa 01 9a 93 3b 3c 1d a0  f2 2e c5 6f 6a d2 c9 35  |....;<.....oj..5|