lastcomm crashes with segfault when processing gzip compressed file.

Issue

• lastcomm crashes with segfault when processing gzip compressed file.

# lastcomm -f pacct.bkup.gz 
?_??O??X"?????k?? SFCDX 12415231 [255,128 22534.40 secs Fri Oct 10 12:42
?U??}??H??JH??ggi  FCDX -6137417 [69,184] 60588529.28 secs Sat Jul 18 05:20
????~w??~???????? S  DX 17919301 [123,25] 143945712.64 secs Wed Jan 31 23:31
???????a?3q?qv=u?  FCD  17186087 [63,127] 13055.87 secs Tue Mar 14 11:36
?1?~??????x??G??? SF D  -1368392 [179,158 136042290.87 secs Tue May 30 14:19
????????|???l?G?? SF  X 61564358 [244,152 93951554.56 secs Mon May  1 05:18
????G??9;U??????? SFC X -1137967 [115,253 153988136.96 secs Mon Nov  3 23:16
J?|Z?]e???_????<? S C   -1419057 [159,188 32340.21 secs Fri May 16 12:01
??x?E?/Ty??m??*??    DX 48650182 [63,234] 228391.60 secs Tue Apr  8 20:54
k?????I?\????0?9?  F D  -1173888 [133,68] 3940.48 secs Mon Mar 23 18:30
?? ???????_[C?q?? SF  X 61590707 [62,66]  85060600.40 secs Sun Mar 29 11:14
??|????????W?_,?\ SFC   -1882549 [253,133 1461288.96 secs Thu Oct 31 00:46
!c?????????#??ys? S CDX 32289843 [87,119] 29419.36 secs Tue Apr 10 15:38
??????????e????G? SFCDX 10727143 [46,52]  17250344.96 secs Thu Apr 10 12:53
+8?:~8?>???e?????   C X -770950  [191,167 1930788.48 secs Wed Dec 31 12:00
?wU~???m????????? S CDX -1108940 [81,183] 69491056.64 secs Wed Oct 11 07:28
??:????h????g?c?h  F    -1281469 [237,151 142934016.00 secs Wed Jun 19 16:22
?_??mc???9?_1?[??  FCD  87318675 [45,63]  310210723.84 secs Fri Aug 29 02:24
==????y??=d???~??  F DX 15459041 [230,167 87996334.08 secs Sat Feb 14 05:40
~??????qBP??????? S  DX -1083663 [187,255 170330847.68 secs Sat May 27 16:16
#?~?l?????OS??W?? SF DX 20919400 [222,159 159970754.56 secs Fri Oct 23 07:13
?h?u????3?#????So SFC   37328501 [246,159 106766023.66 secs Sun Apr 11 17:40
?Q>-??D??'????~??   CDX -1132809 pts/2034 5067204.48 secs Sat Apr  3 03:08
???????????????W? S CDX -6561482 [254,196 133059051.52 secs Thu Feb 12 14:12
                   FC X 82964019 [246,115 17671167.99 secs Wed Mar 14 04:13
????????????'H??? SFCDX -2044846 [239,30] 323573.68 secs Sat Jan 24 17:28
???#?????s??Q???S S CDX 10232717 [38,252] 39292.80 secs Sat Jun 10 22:54
|<<??????oa?O??o?  F DX 29641090 [145,51] 333378.48 secs Sat May  3 02:25
?????????c?y9i?e?  F D  -3189061 [228,223 36805037.78 secs Sun Oct  1 07:18
????K>????8???t?O SFCDX 12058953 [229,88] 5824512.00 secs Tue Dec 29 16:48
??g???oV?cH??od?? SFCD  -1773744 [255,246 98186685.44 secs Thu Mar  2 01:18
U~k?????????????? SFCDX 13416271 [241,252 9400232.96 secs Mon Dec 19 14:07
????+???.?s??????  FC X -1208915 [224,17] 10299310.08 secs Sat Dec 19 23:05
?M`??]x???P?O???/    DX -1105757 [167,47] 12708787.05 secs Mon Apr 23 00:24
???????^??}?????? S CDX 13215384 [232,165 31016.32 secs Thu May 11 12:53
????????u??????(g SFCDX -1784640 [127,191 329194.88 secs Fri Feb 24 19:01
}0????,?N???H???? SFCDX 21328197 [126,107 2168746.24 secs Sat Sep  7 18:47
@?_??#?m.?4K????? S   X -1751256 [0,55]   137236.29 secs Thu Feb  4 10:54
?/???*??U???e?0?? SF  X -9411852 [11,183] 174459453.44 secs Mon Feb  7 01:27
?????#???d?_??m?? SFCDX 19849539 [73,59]  15435313.92 secs Tue May 10 02:55
i???????|?????}A? SFC   -1547646 [177,158 15823613.36 secs Sun Jul  8 07:29
??O?sw???3*??????  F  X 10564442 [231,118 509.02 secs Thu Mar 12 14:10
????h?K]?:??????1  FC X -1645240 [226,151 133022425.39 secs Mon Dec  8 21:57
?????T?????"??0cW SFC X -1205874 [252,169 13252032.32 secs Sat Apr 13 18:13
?lv?/?O????s?^?O? SFCD  -1780957 [159,237 22138060.80 secs Sat Feb  4 22:33
??f?8??I]?%B???5l S  D  20442838 [34,105] 134680882.56 secs Sun Nov 15 06:58
??E?/]?0~????!??? S  D  99296107 [248,224 19455954.56 secs Wed Aug 25 07:21
V?????J??J??????$ SFCDX -2768529 [29,254] 143147023.36 secs Wed Jun 30 06:33
?x???o5?~??o3?~?G SFCDX -1944110 [214,26] 16103424.00 secs Thu Dec  8 04:48
?f?ZQPY?????R??*? S C   -3356401 [129,75] 19816770.56 secs Thu Feb  5 00:08
??U??$??Z???$??Y?  F D  21419025 [64,255] 2828.78 secs Thu Dec 16 01:49
?1??????4>?S~M???   CD  16081641 [95,254] 22125165.52 secs Tue May 13 04:40
?~?SC%??pnY(Z?z?? SFC X 14275624 [99,253] 215709.49 secs Sat Apr 25 04:10
?j?N3??????#e??;? SFCD  52558016 [44,203] 1471346.09 secs Wed Apr 13 09:14
I?i?u?U2????????V   CDX 38777260 [215,19] 61293071.36 secs Tue Aug  1 20:04
>?j??$??Y???d???? SF    52848001 [175,218 144379601.92 secs Tue Jul  5 09:23
6'??????x??~?2?X?    DX -5699820 [178,103 171007344.64 secs Sun Jun 22 19:56
? ?_?B?MyanQ?R???   CDX -1705574 [197,24] 153027870.72 secs Sun Jul 25 00:59
?+??A???h<???>I?? SF DX -1583356 [158,211 168948191.36 secs Fri Sep 13 06:32
????????1v?????3g SF    39949251 [249,86] 953200.40 secs Sat Nov  5 21:32
?O????M?x??=/??n?     X -1992295 [225,75] 99279680.56 secs Sun Jan 10 05:23
??P?|??????~v       C X 13404072 [207,99] 146759226.48 secs Sat Apr  5 01:52
?????????'?9????? S C   13677678 [111,250 222167.04 secs Sat Apr  4 03:05
???(<?o?????u?cO?   C   17438300 [254,163 8977162.24 secs Sat Dec 31 22:18
?"???E???_'??????  F    33501147 [20,175] 12011325.44 secs Sat Feb 14 13:45
??%?O??`?O????<??  FC   66594607 [242,72] 11655.68 secs Tue Dec  1 11:02
??O????????8?????  F  X 21333937 [112,235 47017820.16 secs Wed May 24 22:14
??1???????:?*????    D  -1390039 [110,30] 191272.96 secs Sat Jan  9 19:54
?<??udl;#O?_?m??~    D  -4352025 [255,2]  31050956.80 secs Tue Feb  7 00:13
???Uz?_s??(_???~?  FC X -2004926 [55,254] 150114218.71 secs Mon May 22 15:41
?k???????????u??? SFCDX 12557998 [51,247] 12061661.20 secs Sun Jun  8 20:24
7????;R??D?????Nf  F DX 52956179 [51,243] 20295.36 secs Thu Jul 13 00:45
???Q??^?5?_O???V?  F D  -5515783 [147,167 8732515.36 secs Fri Oct  1 04:34
??x?H??#3x????m?d    DX -1281425 [205,230 171735827.82 secs Wed Jan  6 08:30
y??????s??c????z? SFCDX 40201081 [195,139 21277818.24 secs Mon Feb 14 21:11
?p?)) Z??^??M???+  FCDX 16562177 [127,168 172506480.64 secs Mon Aug 20 04:04
z???????????????x  F  X -1615480 [72,236] 28881.44 secs Tue Apr  2 16:05
???h?W??????????? S  D  21030484 pts/1350 100663300.95 secs Sun Feb  5 00:25
?q????C?????z???? S   X 92222226 [81,92]  17445683.20 secs Sat Jan 26 21:07
 ???????????????? SFCD  -1820120 [184,218 217055232.00 secs Sat May 10 17:14
;Q????5i??57?????     X 20818779 [106,219 1404.88 secs Wed Jan 11 08:04
???>????;?Y)??a?  SFC X -7048569 [191,246 123199482.88 secs Fri Jul 29 05:20
?w????????U~u???? S  DX -2051031 [191,232 178336563.20 secs Sun Jul  8 21:59
?????/???*??????( S CD  17427422 [251,24] 10743930.88 secs Sat May 27 13:07
??y\???????hm??}?  F DX -1347969 [54,54]  3646456.31 secs Wed Oct 10 18:18
%?_??=??=?4?9???? S CDX -2067990 [56,87]  42719035.03 secs Fri May  6 06:52
???????????_;???? SFCD  81250553 [220,255 150953000.96 secs Thu Jan  3 21:27
?|??o??????\??a?? SFCDX -9151367 [234,239 8582184.96 secs Fri Jun  9 02:58
???????|????{     S     87220350 [249,68] 112808016.64 secs Mon Jun  3 11:58
]??^??^?????\*?l? SF D  17649371 [172,253 154751953.28 secs Thu Jun 15 06:41
???????@?c??o????  F DX -1677844 [63,120] 21286174.71 secs Sat Dec 11 07:02
Wi??????gW????^{?    DX -3543174 [103,202 964812.80 secs Sat Apr 23 22:33
???0??6?6???_"??\ S CDX 83192892 [243,166 42048.64 secs Tue Oct 27 23:44
?j?7??c??O%??s??? SF  X 60037521 [51,192] 154057070.32 secs Sat Apr 26 22:29
!_????g?c????g??? SF  X -1568946 [63,237] 49367.04 secs Tue Oct  5 07:30
?V???c?????????4? SFC   -1009125 [255,229 163143.58 secs Sat Mar 26 15:45
?]?H?6??d?????go?   C X -1351892 [168,201 1081579.52 secs Sat Dec  8 02:17
;??O???HE??~?c|K? SFCDX 80734629 [6,93]   524702.72 secs Wed Jun 16 17:42
??O?????8@?????>? SFCDX -4378425 [211,249 2191933.44 secs Mon Oct 27 09:35
?0?a?k??v??????e? SF D  80522583 [176,104 15680.48 secs Sat Dec 20 21:15
?h?????b'???"?Y??  FCDX 18224238 [148,150 136650438.58 secs Sun Jan 28 10:04
????b????9[??3??S  FCD  -2932132 [60,104] 118467624.96 secs Sun Mar  9 14:45
????F???????g??'?    D  28410894 [12,214] 53854863.36 secs Tue Oct 14 16:23
?V??@?m??c??????$ SFCDX 20266083 [253,46] 12488499.20 secs Mon Jan 24 18:51
?$?E?????????#???  FCDX -1903705 [191,46] 2656868.14 secs Wed Jan 24 13:12
????cg?$?F??.???4 SFCDX -4846903 [39,206]  14.90 secs Tue Jan 18 23:51
???\??=?7??????p?  F DX 58942000 [73,167] 6608397.44 secs Sun Nov 13 20:03
D???????i=???\??[   CDX -1739089 [242,249 4169272.32 secs Sat Sep 27 02:47
?????(?_?w???)??-   CD  -2424710 [235,152 310303.84 secs Sun Mar 21 05:36
????????????33g??   C X -1979676 [75,74]  3783.68 secs Thu Mar 15 14:23
@                   C X 16401    __         0.00 secs Thu Jan  1 09:00
Segmentation fault