From: "A.Appleyard" <A DOT APPLEYARD AT fs2 DOT mt DOT umist DOT ac DOT uk>
To: DJGPP AT sun DOT soe DOT clarkson DOT edu
Date: Tue, 14 Nov 1995 14:37:03 GMT
Subject: A funny abort in djgpp

  I have dj112m1.zip dj112m2.zip djdev112.zip djdoc112.zip djemu112.zip
djeoe112.zip djlgr112.zip djlsr112.zip djsrc112.zip djtst112.zip fsdb091a.zip
gas23bn.zip gas23dc.zip gcc260bn.zip gcc260dc.zip gcc260rm.zip gdb412bn.zip
gdb412dc.zip gpp260.zip lgp260bn.zip lgp260dc.zip lgp260sr.zip txi310bn.zip
txi310dc.zip unzip386.exe wmemu112.zip
  When I compile the program T$.CC quoted below as `gcc t$.cc -c', I get a
abort "Segmentation violation in pointer 0x00000009 at d8:585a9". But if I
comment out the instruction `H=new header[n];', the compilation completes. I
get no djgpp fault or warning messages in either case. OK, I should have put
`H=new header*[n];'. And it should have told me so, not crashed out.

#define uns unsigned
#define reg register
#define pk __attribute__((packed))
typedef uns long ul;
typedef uns short us;
typedef uns char byte;
class buffer{public: double x;};
class line  {public: double x; line*next;};
class FCBtime{public: uns short x; void strcat(char*B);};
class FCBdate{public: uns short x; void strcat(char*B);};
class header{public: ul signature pk; byte versionreqd pk; byte opsystem pk;
  us gp pk; us compmethod pk; FCBtime time pk; FCBdate date pk; ul crc32 pk;
  ul compsize pk; ul uncompsize pk; us fnleng pk; us extraleng pk; int pr();};
class centralheader{public: ul signature pk; byte version pk; byte opsystem pk;
  byte versionreqd pk; byte opsystemreqd pk; us gp pk; us compmethod pk;
  FCBtime time pk; FCBdate date pk; ul crc32 pk; ul compsize pk;
  ul uncompsize pk; us fnleng pk; us extraleng pk; us fcommleng pk;
  us filediskno pk; us intattr pk; ul extattr pk; ul localoffset pk; int pr();};
class tailend{public: ul signature pk; us thisdiskno pk; us cendirbegdiskno pk;
  us nentries pk; us nfiles pk; ul cendirsize pk; ul cendiroffset pk;
  us commentsize pk; int pr();};
short HS=sizeof(header),CS=sizeof(centralheader),TS=sizeof(tailend);
/*-----*/
class zipinfo{public: header**H; centralheader**C; tailend*T; ul**nH,**nC,*nT;
void operator=(buffer*B);};
/*-----*/
void zipinfo::operator=(buffer*B){int i,n=0; line*L; while(L=L->next) n++;
H=new header[n];}