title: cygwin exception when assigning value to vector of strings
body: <p>I am having following exception during the course of the run of program:</p>
  
  <pre><code>0 [main] myFunction 5560 cygwin_exception::open_stackdumpfile: Dumping stack trace to myFunction.exe.stackdump
  </code></pre>
  
  <p>The contents of stackdump file are as follows:</p>
  
  <pre><code>Stack trace:
  Frame        Function    Args
  00000223800  0018006FB93 (0060007AE38, 00600083EC8, 00600083EF8, 00600083F28)
  00000000006  0018007105A (0060007BB78, 00600000000, 0000000014C, 00000000000)
  000002239E0  0018011C6A7 (00600083048, 00600083078, 006000830A8, 006000830D8)
  00000000041  001801198DE (0060007DCB8, 0060007DCE8, 00000000000, 0060007DD48)
  0060008F2B0  00180119DAB (0060007E1F8, 0060007E228, 0060007E258, 00000000006)
  0060008F2B0  00180119F7C (0060007CB38, 0060007CB68, 0060007CB98, 0060007CBC8)
  0060008F2B0  0018011A23F (00180115A0B, 0060007CCE8, 006000885B0, 00000000000)
  0060008F2B0  00180148A65 (003FC4AA93D, 00600083900, 00100439102, 0060007B080)
  0060008F2B0  001800C1DB3 (00000000000, 00000223EE0, 0010042A2BC, 00000223E90)
  0060008F2B0  00180115A0B (00000223EE0, 0010042A2BC, 00000223E90, 00000000017)
  0060008F2B0  00600000001 (00000223EE0, 0010042A2BC, 00000223E90, 00000000017)
  End of stack trace
  </code></pre>
  
  <p>Let me describe in detail the peculiar problem which happens at runtime. I am not able to describe the problem with just words, so I am listing scenario when the program works and when it fails.</p>
  
  <p>I have created a vector of string in my header file and initialised them in the constructor as follows :</p>
  
  <pre><code>std::vector &lt;std::string&gt; symbolMap,localSymbolMap;
  
  for(int i=0;i&lt;100;i++){
      symbolMap.push_back(" ");
      localSymbolMap.push_back(" ");
  }
  </code></pre>
  
  <p>I have defined a function to assign appropriate value to these variables later in the program as follows :</p>
  
  <pre><code>void TestClient::setTickerMap(int j, std::string symbol, std::string localSymbol){
  
  symbolMap[j] = symbol;
  localSymbolMap[j]=localSymbol;
  }
  </code></pre>
  
  <p>Now, in the main program, I call this function as follows:</p>
  
  <pre><code>TestClient client;
  for(int j=0;j&lt;27;j++){
  std::cout&lt;&lt;j&lt;&lt;" "&lt;&lt;realTimeSymbols[j]&lt;&lt;" "&lt;&lt;getLocalSymbol(realTimeSymbols[j],date)&lt;&lt;std::endl;    
  </code></pre>
  
  <p>client.setTickerMap(j,realTimeSymbols[j],getLocalSymbol(realTimeSymbols[j],date));
      }
      // Here, I have checked for each j, that values of realTimeSymbols and getLocalSymbol are proper.</p>
  
  <p>When I run the program, I get the error described above. The program always crashed when j is equal to 24.</p>
  
  <p>Now the following workaround is working as of now:</p>
  
  <pre><code>void TestClient ::setTickerMap(int j, std::string symbol, std::string localSymbol){
      if(j==24){
  //      symbolMap[j]="SYNDIBANK";
  //      localSymbolMap[j]="SYNDIBANK15MARFUT";
      }
      else{
      symbolMap[j] = symbol;
      localSymbolMap[j]=localSymbol;
      }
      if(j==1){
          symbolMap[24]="SYNDIBANK";
          localSymbolMap[24]="SYNDIBANK15MARFUT";
      }
  }
  </code></pre>
  
  <p>Following 3 variations of the code are above workaround <strong>are not working</strong> and they result in the original error:</p>
  
  <p>Variation 1:</p>
  
  <pre><code>void TestClient ::setTickerMap(int j, std::string symbol, std::string localSymbol){
      if(j==24){
  //      symbolMap[j]="SYNDIBANK";
  //      localSymbolMap[j]="SYNDIBANK15MARFUT";
      }
      else{
      symbolMap[j] = symbol;
      localSymbolMap[j]=localSymbol;
      }
      if(j==25){
          symbolMap[24]="SYNDIBANK";
          localSymbolMap[24]="SYNDIBANK15MARFUT";
      }
  }
  </code></pre>
  
  <p>Variation 2:</p>
  
  <pre><code>void TestClient ::setTickerMap(int j, std::string symbol, std::string localSymbol){
      if(j==24){
          symbolMap[j]="SYNDIBANK";
          localSymbolMap[j]="SYNDIBANK15MARFUT";
      }
      else{
      symbolMap[j] = symbol;
      localSymbolMap[j]=localSymbol;
      }
  }
  </code></pre>
  
  <p>Variation 3:</p>
  
  <pre><code>void TestClient ::setTickerMap(int j, std::string symbol, std::string localSymbol){
      if(j==24){
          symbolMap[j]="AB";
          localSymbolMap[j]="SYNDIBANK15MARFUT";
      }
      else{
      symbolMap[j] = symbol;
      localSymbolMap[j]=localSymbol;
      }
  }
  </code></pre>
  
  <p>Now, if I assign a single character to symbolMap in variation 3 as follows :</p>
  
  <pre><code> symbolMap[j]="A";
  </code></pre>
  
  <p>then the code is able to run(although is the result is not correct).</p>
  
  <p>I am not able to figure what exactly is causing this runtime error. I have checked the related question (<a href="https://stackoverflow.com/questions/25837874/cygwin-exception-open-stack-dump-file">Cygwin Exception : open stack dump file</a>) and I do not have a separate session of cygwin running. I have restarted my PC just be extra sure. Still the problem persists. Any suggestions as to why this behaviour is seen on my PC.</p>
  
  <p><strong>UPDATE:</strong>
  To be sure that the error is not related to out-of-index, the following call from main program works fine:</p>
  
  <pre><code>    TestClient client;
      for(int j=25;j&lt;27;j++){
      std::cout&lt;&lt;j&lt;&lt;" "&lt;&lt;realTimeSymbols[j]&lt;&lt;" "&lt;&lt;getLocalSymbol(realTimeSymbols[j],date)&lt;&lt;std::endl;    
    client.setTickerMap(j,realTimeSymbols[j],getLocalSymbol(realTimeSymbols[j],date));
      }
  </code></pre>
  
  <p>The program also works fine when j is iterated from 24 to 27. But fails when the loop is iterated from any number before 24 to 27.</p>
  
  <p><strong>GDB OUTPUT</strong>
  I do not have much experience with gdb but following is the output of the gdb if it helps:</p>
  
  <pre><code>GNU gdb (GDB) 7.8
  Copyright (C) 2014 Free Software Foundation, Inc.
  License GPLv3+: GNU GPL version 3 or later &lt;http://gnu.org/licenses/gpl.html&gt;
  This is free software: you are free to change and redistribute it.
  There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
  and "show warranty" for details.
  This GDB was configured as "x86_64-pc-cygwin".
  Type "show configuration" for configuration details.
  For bug reporting instructions, please see:
  &lt;http://www.gnu.org/software/gdb/bugs/&gt;.
  Find the GDB manual and other documentation resources online at:
  &lt;http://www.gnu.org/software/gdb/documentation/&gt;.
  For help, type "help".
  Type "apropos word" to search for commands related to "word"...
  Reading symbols from order_trading2632_limit.exe...done.
  (gdb) run
  Starting program: /cygdrive/e/eclipse_workspace/testClient/Debug/testClient.exe
  [New Thread 4832.0x11e4]
  [New Thread 4832.0x1798]
  Attempt 1 of 10000
  [New Thread 4832.0x1020]
  Connection successful
  
  Program received signal SIGABRT, Aborted.
  0x00000003fc4ab0e3 in cygstdc++-6!_ZNSs6assignERKSs () from /usr/bin/cygstdc++-6.dll
  (gdb) bt
  #0  0x00000003fc4ab0e3 in cygstdc++-6!_ZNSs6assignERKSs () from /usr/bin/cygstdc++-6.dll
  #1  0x0000000000000000 in ?? ()
  Backtrace stopped: previous frame inner to this frame (corrupt stack?)
  (gdb) set $pc=*(void **)$rsp
  (gdb) set $rsp=$rsp+8
  (gdb) bt
  #0  0x000007fefd3110ac in WaitForSingleObjectEx () from /cygdrive/c/Windows/system32/KERNELBASE.dll
  #1  0x000000018011c639 in sig_send(_pinfo*, siginfo_t&amp;, _cygtls*) () from /usr/bin/cygwin1.dll
  #2  0x00000001801198de in _pinfo::kill(siginfo_t&amp;) () from /usr/bin/cygwin1.dll
  #3  0x0000000180119dab in kill0(int, siginfo_t&amp;) () from /usr/bin/cygwin1.dll
  #4  0x0000000180119f7c in raise () from /usr/bin/cygwin1.dll
  #5  0x000000018011a23f in abort () from /usr/bin/cygwin1.dll
  #6  0x0000000180148a65 in dlfree () from /usr/bin/cygwin1.dll
  #7  0x00000001800c1db3 in free () from /usr/bin/cygwin1.dll
  #8  0x0000000180115a0b in _sigfe () from /usr/bin/cygwin1.dll
  #9  0x0000000000000000 in ?? ()
  Backtrace stopped: previous frame inner to this frame (corrupt stack?)
  </code></pre>
  
  <p>Note that stack trace is corrupted and I have used trick from following question to print the stacktrace (<a href="https://stackoverflow.com/questions/9809810/gdb-corrupted-stack-frame-how-to-debug">GDB corrupted stack frame - How to debug?</a>). Please help me in debugging the program further.</p>
  
  <p><strong>UPDATE</strong> </p>
  
  <p>It is not the case that the error happens only when index is 24. Before calling the said loop, I initialize various arrays of int, double and string. Changing the number of initialization affects the index when this error happens. Today, I initialised vectors of length 24 before running this loop, this time the error happened at index 3. </p>
  
  <p>This is really frustrating to implement the workaround. I do not that if there are some other memory issues I am overlooking because of this. Please offer suggestions.</p>
  
  <p><strong>CODE</strong></p>
  
  <pre><code>int main(int argc, char** argv) {
      unsigned int port = 7900;
      const char* host = "";
      int clientId = 6;
      int attempt = 0;
      int MAX_ATTEMPTS=10000;
       int NUMREALTIMESYMBOLS=37;
       std::string realTimeSymbolsArr[]={"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z","aa","bb","cc","dd","ee","ff","gg","hh","ii","jj","kk"};
       std::vector &lt;std::string&gt; realTimeSymbols(realTimeSymbolsArr,realTimeSymbolsArr+NUMREALTIMESYMBOLS);
       int isTradeable[]={1,0,0,0,1,0,1,1,1,1,1,0,0,1,0,1,1,0,0,0,0,1,0,0,0,0,0,1,1,1,0,1,0,1,1,0,1};
       int numSubscriptions[]={2,2,1,4,1,1,2,6,3,1,1,1,2,1,3,1,1,2,1,3,1,1,1,10,4,1,6,1,1,9,4,2,1,3,1,1,2};
       int subscriptionList[NUMREALTIMESYMBOLS][100];
       int subscriptionIndex[NUMREALTIMESYMBOLS][100];
       subscriptionList[0][0]=0;subscriptionIndex[0][0]=0;
       subscriptionList[0][1]=2;subscriptionIndex[0][1]=2;
       subscriptionList[1][0]=2;subscriptionIndex[1][0]=1;
       subscriptionList[1][1]=0;subscriptionIndex[1][1]=3;
       subscriptionList[2][0]=2;subscriptionIndex[2][0]=0;
       subscriptionList[3][0]=4;subscriptionIndex[3][0]=2;
       subscriptionList[3][1]=31;subscriptionIndex[3][1]=2;
       subscriptionList[3][2]=13;subscriptionIndex[3][2]=3;
       subscriptionList[3][3]=34;subscriptionIndex[3][3]=3;
       subscriptionList[4][0]=4;subscriptionIndex[4][0]=0;
       subscriptionList[5][0]=9;subscriptionIndex[5][0]=2;
       subscriptionList[6][0]=6;subscriptionIndex[6][0]=0;
       subscriptionList[6][1]=8;subscriptionIndex[6][1]=2;
       subscriptionList[7][0]=7;subscriptionIndex[7][0]=0;
       subscriptionList[7][1]=8;subscriptionIndex[7][1]=1;
       subscriptionList[7][2]=31;subscriptionIndex[7][2]=1;
       subscriptionList[7][3]=36;subscriptionIndex[7][3]=1;
       subscriptionList[7][4]=13;subscriptionIndex[7][4]=2;
       subscriptionList[7][5]=34;subscriptionIndex[7][5]=2;
       subscriptionList[8][0]=8;subscriptionIndex[8][0]=0;
       subscriptionList[8][1]=7;subscriptionIndex[8][1]=1;
       subscriptionList[8][2]=21;subscriptionIndex[8][2]=3;
       subscriptionList[9][0]=9;subscriptionIndex[9][0]=0;
       subscriptionList[10][0]=10;subscriptionIndex[10][0]=0;
       subscriptionList[11][0]=11;subscriptionIndex[11][0]=0;
       subscriptionList[12][0]=28;subscriptionIndex[12][0]=3;
       subscriptionList[12][1]=33;subscriptionIndex[12][1]=3;
       subscriptionList[13][0]=13;subscriptionIndex[13][0]=0;
       subscriptionList[14][0]=33;subscriptionIndex[14][0]=1;
       subscriptionList[14][1]=28;subscriptionIndex[14][1]=2;
       subscriptionList[14][2]=15;subscriptionIndex[14][2]=3;
       subscriptionList[15][0]=15;subscriptionIndex[15][0]=0;
       subscriptionList[16][0]=16;subscriptionIndex[16][0]=0;
       subscriptionList[17][0]=0;subscriptionIndex[17][0]=1;
       subscriptionList[17][1]=11;subscriptionIndex[17][1]=2;
       subscriptionList[18][0]=7;subscriptionIndex[18][0]=2;
       subscriptionList[19][0]=6;subscriptionIndex[19][0]=3;
       subscriptionList[19][1]=8;subscriptionIndex[19][1]=3;
       subscriptionList[19][2]=16;subscriptionIndex[19][2]=3;
       subscriptionList[20][0]=9;subscriptionIndex[20][0]=1;
       subscriptionList[21][0]=21;subscriptionIndex[21][0]=0;
       subscriptionList[22][0]=9;subscriptionIndex[22][0]=3;
       subscriptionList[23][0]=6;subscriptionIndex[23][0]=1;
       subscriptionList[23][1]=10;subscriptionIndex[23][1]=1;
       subscriptionList[23][2]=27;subscriptionIndex[23][2]=1;
       subscriptionList[23][3]=29;subscriptionIndex[23][3]=1;
       subscriptionList[23][4]=16;subscriptionIndex[23][4]=2;
       subscriptionList[23][5]=21;subscriptionIndex[23][5]=2;
       subscriptionList[23][6]=2;subscriptionIndex[23][6]=3;
       subscriptionList[23][7]=4;subscriptionIndex[23][7]=3;
       subscriptionList[23][8]=7;subscriptionIndex[23][8]=3;
       subscriptionList[23][9]=36;subscriptionIndex[23][9]=3;
       subscriptionList[24][0]=24;subscriptionIndex[24][0]=0;
       subscriptionList[24][1]=24;subscriptionIndex[24][1]=1;
       subscriptionList[24][2]=24;subscriptionIndex[24][2]=2;
       subscriptionList[24][3]=24;subscriptionIndex[24][3]=3;
       subscriptionList[25][0]=29;subscriptionIndex[25][0]=3;
       subscriptionList[26][0]=21;subscriptionIndex[26][0]=1;
       subscriptionList[26][1]=0;subscriptionIndex[26][1]=2;
       subscriptionList[26][2]=10;subscriptionIndex[26][2]=2;
       subscriptionList[26][3]=15;subscriptionIndex[26][3]=2;
       subscriptionList[26][4]=27;subscriptionIndex[26][4]=2;
       subscriptionList[26][5]=33;subscriptionIndex[26][5]=2;
       subscriptionList[27][0]=27;subscriptionIndex[27][0]=0;
       subscriptionList[28][0]=28;subscriptionIndex[28][0]=0;
       subscriptionList[29][0]=29;subscriptionIndex[29][0]=0;
       subscriptionList[29][1]=4;subscriptionIndex[29][1]=1;
       subscriptionList[29][2]=13;subscriptionIndex[29][2]=1;
       subscriptionList[29][3]=16;subscriptionIndex[29][3]=1;
       subscriptionList[29][4]=34;subscriptionIndex[29][4]=1;
       subscriptionList[29][5]=6;subscriptionIndex[29][5]=2;
       subscriptionList[29][6]=36;subscriptionIndex[29][6]=2;
       subscriptionList[29][7]=27;subscriptionIndex[29][7]=3;
       subscriptionList[29][8]=31;subscriptionIndex[29][8]=3;
       subscriptionList[30][0]=30;subscriptionIndex[30][0]=0;
       subscriptionList[30][1]=30;subscriptionIndex[30][1]=1;
       subscriptionList[30][2]=30;subscriptionIndex[30][2]=2;
       subscriptionList[30][3]=30;subscriptionIndex[30][3]=3;
       subscriptionList[31][0]=31;subscriptionIndex[31][0]=0;
       subscriptionList[31][1]=29;subscriptionIndex[31][1]=2;
       subscriptionList[32][0]=11;subscriptionIndex[32][0]=3;
       subscriptionList[33][0]=33;subscriptionIndex[33][0]=0;
       subscriptionList[33][1]=15;subscriptionIndex[33][1]=1;
       subscriptionList[33][2]=28;subscriptionIndex[33][2]=1;
       subscriptionList[34][0]=34;subscriptionIndex[34][0]=0;
       subscriptionList[35][0]=11;subscriptionIndex[35][0]=1;
       subscriptionList[36][0]=36;subscriptionIndex[36][0]=0;
       subscriptionList[36][1]=10;subscriptionIndex[36][1]=3;
       double a1[]={720,0.0,750,0.0,900,0.0,760,360,120,390,600,360,0.0,760,0.0,140,660,0.0,0.0,0.0,0.0,720,0.0,0.0,100,0.0,0.0,120,320,40,100,500,0.0,630,570,0.0,100};
       double a2[]={0.5,0.0,1.3,0.0,0.6,0.0,0.45,0.15,0.45,0.4,0.25,1.4,0.0,0.55,0.0,0.2,0.8,0.0,0.0,0.0,0.0,0.6,0.0,0.0,0.4,0.0,0.0,0.25,0.4,0.25,0.4,0.35,0.0,0.4,0.5,0.0,0.4};
       double a3[]={1350,0.0,1250,0.0,300,0.0,1150,1400,900,1200,850,900,0.0,600,0.0,1450,1450,0.0,0.0,0.0,0.0,1000,0.0,0.0,1200,0.0,0.0,1150,350,1400,1200,1350,0.0,1500,300,0.0,1200};
       double a4[]={0.6,0.0,0.7,0.0,0.2,0.0,0.3,0.55,0.4,0.8,0.25,0.7,0.0,0.25,0.0,0.55,0.5,0.0,0.0,0.0,0.0,0.4,0.0,0.0,0.7,0.0,0.0,0.65,0.55,0.45,0.7,0.6,0.0,0.4,0.4,0.0,0.7};
       double a5[]={300,0.0,1300,0.0,1350,0.0,200,1100,1200,650,1500,1350,0.0,1050,0.0,1300,550,0.0,0.0,0.0,0.0,250,0.0,0.0,150,0.0,0.0,1250,700,1150,150,1250,0.0,1500,1500,0.0,150};
       double a6[]={0.3,0.0,0.8,0.0,0.6,0.0,0.5,0.6,0.6,0.3,0.35,0.7,0.0,0.55,0.0,0.45,0.35,0.0,0.0,0.0,0.0,0.3,0.0,0.0,0.5,0.0,0.0,0.55,0.3,0.35,0.5,0.75,0.0,0.2,0.5,0.0,0.5};
       double a7[]={1500,0.0,1500,0.0,1050,0.0,750,1100,1350,1350,100,1350,0.0,550,0.0,1400,1000,0.0,0.0,0.0,0.0,1000,0.0,0.0,1350,0.0,0.0,350,550,350,1350,500,0.0,1350,1250,0.0,1350};
       double a8[]={0.9,0.0,0.9,0.0,0.8,0.0,0.6,0.35,0.7,0.2,0.15,0.7,0.0,0.3,0.0,0.55,0.5,0.0,0.0,0.0,0.0,0,0.0,0.0,0.3,0.0,0.0,0.4,0.3,0.5,0.3,0.35,0.0,0.5,0.5,0.0,0.3};
       double a9[]={0.008,0.0,0.009,0.0,0.01,0.0,0.01,0.009,0.009,0.007,0.009,0.01,0.0,0.009,0.0,0.01,0.008,0.0,0.0,0.0,0.0,0.01,0.0,0.0,0.006,0.0,0.0,0.008,0.009,0.01,0.006,0.009,0.0,0.008,0.009,0.0,0.006};
       double a10[]={0.008,0.0,0.009,0.0,0.008,0.0,0.008,0.008,0.009,0.008,0.008,0.006,0.0,0.009,0.0,0.01,0.008,0.0,0.0,0.0,0.0,0.005,0.0,0.0,0.009,0.0,0.0,0.01,0.008,0.009,0.009,0.009,0.0,0.008,0.01,0.0,0.009};
       double a11[]={0.4,0.0,0.2,0.0,0.1,0.0,0.3,0.4,0.2,0.1,0.7,0.2,0.0,0,0.0,0.1,0,0.0,0.0,0.0,0.0,0.1,0.0,0.0,0.2,0.0,0.0,0.3,0,0.2,0.2,0,0.0,0.7,0.1,0.0,0.2};
       int a12[]={500,1000,8000,2000,4000,1000,1250,1000,1000,500,1000,125,2000,4000,1000,250,2000,250,1000,1250,500,2000,1000,500,0,250,500,4000,4000,1250,0,2000,500,500,4000,125,1000};
       double a13[]={0.0013406,0.0020022,0.0018709,0.0018948,0.0017975,0.0014687,0.0011068,0.001355,0.0010891,0.00088151,0.0014294,0.0012989,0.0014205,0.0019711,0.0015365,0.0020505,0.0018961,0.00078672,0.0023114,0.0012203,0.0012849,0.0015674,0.0012844,0.0014197,0.0,0.00074657,0.00096164,0.0017109,0.0015385,0.00068178,0.0,0.0021815,0.00087359,0.00074349,0.0021645,0.001595,0.0014573};
       int a14[]={14850,0,16500,0,13740,0,13740,24750,13740,14100,13740,30750,0,14400,0,13740,13740,0,0,0,0,14100,0,0,13500,0,0,13740,13740,25200,13500,13740,0,13740,13740,0,13740};
       int a15[]={30750,0,35900,0,34950,0,35900,35900,35900,35900,30000,34950,0,26250,0,34000,35900,0,0,0,0,34500,0,0,13500,0,0,35900,34650,35900,13500,32700,0,35900,35900,0,33300};
        Client client;
       for (int i = 0; i &lt; MAX_ATTEMPTS; i++) {
          client.connect(host, port, clientId);
          ++attempt;
          std::cout &lt;&lt; "Attempt " &lt;&lt; attempt &lt;&lt; " of " &lt;&lt; MAX_ATTEMPTS&lt;&lt; std::endl;
          for (int j=0;j&lt;NUMREALTIMESYMBOLS;j++){
              if(j==24 || j==30)
                  continue;
  
              std::cout&lt;&lt;j&lt;&lt;" "&lt;&lt;realTimeSymbols[j]&lt;&lt;" "&lt;&lt;getLocalSymbol(realTimeSymbols[j],date)&lt;&lt;std::endl;
              client.setTickerMap(j,realTimeSymbols[j],getLocalSymbol(realTimeSymbols[j],date));
          }
      }
  }
  </code></pre>
  
  <p>Constructor of Client:</p>
  
  <pre><code> Client::Client(){
      for(int i=0;i&lt;50;i++){
          symbolMap.push_back(" ");
          localSymbolMap.push_back(" ");
      }
  }
  </code></pre>
  
  <p>The above code fails at 24 and 30. Hence, the loop to continue when j is 24 or 30 as workaround.</p>