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POglibc detected realloc(): invalid pointer
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  1. POglibc detected realloc(): invalid pointer
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    copied!<p>Im constantly getting this when I build on Qtcreator. </p> <pre><code> *** glibc detected *** /home/Exxamples/EffectivCons: realloc(): invalid pointer: 0xb6fb5414 *** ======= Backtrace: ========= /lib/i386-linux-gnu/libc.so.6(+0x75ee2)[0xb6603ee2] /lib/i386-linux-gnu/libc.so.6(realloc+0x25d)[0xb660856d] /lib/i386-linux-gnu/libc.so.6(realloc+0x273)[0xb6608583] /opt/Qt5.1.1/5.1.1/gcc/lib/libQt5Core.so.5(_ZN9QListData7reallocEi+0x37)[0xb6906e67] /opt/Qt5.1.1/5.1.1/gcc/lib/libQt5Core.so.5(_ZN9QListData6appendEi+0x7c)[0xb6906f4c] /opt/Qt5.1.1/5.1.1/gcc/lib/libQt5Core.so.5(_ZN9QListData6appendEv+0x23)[0xb6906fd3] /opt/Qt5.1.1/5.1.1/gcc/lib/libQt5Core.so.5(+0x1afa3e)[0xb6a05a3e] /opt/Qt5.1.1/5.1.1/gcc/lib/libQt5Core.so.5(_Z21qRegisterResourceDataiPKhS0_S0_+0x216)[ </code></pre> <p>This is my code, through the other questions on the website, I saw some users using malloc or realloc, but Im not using it, why am i getting an error?</p> <pre><code> #include &lt;termios.h&gt; #include &lt;string.h&gt; #include &lt;stdlib.h&gt; #define BUFLEN 512 std::string numberToString(const int n); void sendExpressivAnimation(int,EmoStateHandle eState); void handleExpressivEvent(std::ostream&amp; os, EmoEngineEventHandle expressivEvent); bool handleUserInput(); void promptUser(); void nonblocking(); int getch(); int kbhit(); int createSocket(); int startSendPort = 30000; struct termios initial_settings, new_settings; int kbhit (void) { struct timeval tv; fd_set rdfs; tv.tv_sec = 0; tv.tv_usec = 0; FD_ZERO(&amp;rdfs); FD_SET (STDIN_FILENO, &amp;rdfs); select(STDIN_FILENO+1, &amp;rdfs, NULL, NULL, &amp;tv); return FD_ISSET(STDIN_FILENO, &amp;rdfs); } int main(int argc, char **argv) { EmoEngineEventHandle eEvent = EE_EmoEngineEventCreate(); EmoStateHandle eState = EE_EmoStateCreate(); unsigned int userID = 0; const int CONTROL_PANEL_PORT = 3008; bool connected = false; if(EE_EngineRemoteConnect("127.0.0.1", CONTROL_PANEL_PORT)== EDK_OK) { std::cout &lt;&lt;"Emotiv Engine started" &lt;&lt; std::endl; connected = true; } else { std::cout &lt;&lt;"Emotiv Engine failed !"&lt;&lt; std::endl; connected = false; } std::cout &lt;&lt; "Type \"exit\" to quit, \"help\" to list available commands..." &lt;&lt; std::endl; promptUser(); int _socket; _socket = createSocket(); if(connected) { nonblocking(); fflush(stdin); while (true) { // Handle the user input //if (_kbhit()) { if (!handleUserInput()) { break; } //} int state = EE_EngineGetNextEvent(eEvent); // New event needs to be handled if (state == EDK_OK) { EE_Event_t eventType = EE_EmoEngineEventGetType(eEvent); EE_EmoEngineEventGetUserId(eEvent, &amp;userID); switch (eventType) { // New headset connected, create a new socket to send the animation case EE_UserAdded: { std::cout &lt;&lt; std::endl &lt;&lt; "New user " &lt;&lt; userID &lt;&lt; " added, sending Expressiv animation to "; std::cout &lt;&lt; "127.0.0.1" &lt;&lt; ":" &lt;&lt; startSendPort &lt;&lt; "..." &lt;&lt; std::endl; promptUser(); break; } // Headset disconnected, remove the existing socket case EE_UserRemoved: { std::cout &lt;&lt; std::endl &lt;&lt; "User " &lt;&lt; userID &lt;&lt; " has been removed." &lt;&lt; std::endl; promptUser(); break; } // Send the Expressiv animation if EmoState has been updated case EE_EmoStateUpdated: { //std::cout &lt;&lt; "New EmoState from user " &lt;&lt; userID &lt;&lt; "..." &lt;&lt; std::endl; EE_EmoEngineEventGetEmoState(eEvent, eState); sendExpressivAnimation(_socket,eState); break; } // Handle Expressiv training event case EE_ExpressivEvent: { handleExpressivEvent(std::cout, eEvent); break; } default: break; } } else if (state != EDK_NO_EVENT) { std::cout &lt;&lt; std::endl &lt;&lt; "Internal error in Emotiv Engine!" &lt;&lt; std::endl; break; } } } EE_EngineDisconnect(); EE_EmoStateFree(eState); EE_EmoEngineEventFree(eEvent); return 0; } std::string numberToString(const int n) { char* buf; //_itoa(n, buf, 10); QString nStr = QString::number(n); buf = nStr.toLocal8Bit().data(); return std::string(buf); } void sendExpressivAnimation(int _socket,EmoStateHandle eState) { std::ostringstream output; EE_ExpressivAlgo_t upperFaceType = ES_ExpressivGetUpperFaceAction(eState); EE_ExpressivAlgo_t lowerFaceType = ES_ExpressivGetLowerFaceAction(eState); float upperFaceAmp = ES_ExpressivGetUpperFaceActionPower(eState); float lowerFaceAmp = ES_ExpressivGetLowerFaceActionPower(eState); if (ES_ExpressivIsBlink(eState)) { output &lt;&lt; "B,"; } if (ES_ExpressivIsLeftWink(eState)) { output &lt;&lt; "l,"; } if (ES_ExpressivIsRightWink(eState)) { output &lt;&lt; "r,"; } if (ES_ExpressivIsLookingRight(eState)) { output &lt;&lt; "R,"; } if (ES_ExpressivIsLookingLeft(eState)) { output &lt;&lt; "L,"; } if (upperFaceAmp &gt; 0.0) { switch (upperFaceType) { case EXP_EYEBROW: output &lt;&lt; "b"; break; case EXP_FURROW: output &lt;&lt; "f"; break; default: break; } output &lt;&lt; numberToString(static_cast&lt;int&gt;(upperFaceAmp*100.0f)) &lt;&lt; ","; } if (lowerFaceAmp &gt; 0.0) { switch (lowerFaceType) { case EXP_CLENCH: output &lt;&lt; "G"; break; case EXP_SMILE: output &lt;&lt; "S"; break; case EXP_LAUGH: output &lt;&lt; "H"; break; case EXP_SMIRK_LEFT: output &lt;&lt; "sl"; break; case EXP_SMIRK_RIGHT: output &lt;&lt; "sr"; break; default: break; } output &lt;&lt; numberToString(static_cast&lt;int&gt;(lowerFaceAmp*100.0f)) &lt;&lt; ","; } std::string outString = output.str(); // Remove the last comma if (outString.length()) { outString.resize(outString.length()-1); } if (!outString.length()) { outString = std::string("neutral"); } if(send(_socket, outString.c_str(), BUFLEN, 0)==-1) { std::cout&lt;&lt;"sending error"&lt;&lt;std::endl; //exit(1); } } void handleExpressivEvent(std::ostream&amp; os, EmoEngineEventHandle expressivEvent) { unsigned int userID = 0; EE_EmoEngineEventGetUserId(expressivEvent, &amp;userID); EE_ExpressivEvent_t eventType = EE_ExpressivEventGetType(expressivEvent); switch (eventType) { case EE_ExpressivTrainingStarted: { os &lt;&lt; std::endl &lt;&lt; "Expressiv training for user " &lt;&lt; userID &lt;&lt; " STARTED!" &lt;&lt; std::endl; break; } case EE_ExpressivTrainingSucceeded: { os &lt;&lt; std::endl &lt;&lt; "Expressiv training for user " &lt;&lt; userID &lt;&lt; " SUCCEEDED!" &lt;&lt; std::endl; break; } case EE_ExpressivTrainingFailed: { os &lt;&lt; std::endl &lt;&lt; "Expressiv training for user " &lt;&lt; userID &lt;&lt; " FAILED!" &lt;&lt; std::endl; break; } case EE_ExpressivTrainingCompleted: { os &lt;&lt; std::endl &lt;&lt; "Expressiv training for user " &lt;&lt; userID &lt;&lt; " COMPLETED!" &lt;&lt; std::endl; break; } case EE_ExpressivTrainingDataErased: { os &lt;&lt; std::endl &lt;&lt; "Expressiv training data for user " &lt;&lt; userID &lt;&lt; " ERASED!" &lt;&lt; std::endl; break; } case EE_ExpressivTrainingRejected: { os &lt;&lt; std::endl &lt;&lt; "Expressiv training for user " &lt;&lt; userID &lt;&lt; " REJECTED!" &lt;&lt; std::endl; break; } case EE_ExpressivTrainingReset: { os &lt;&lt; std::endl &lt;&lt; "Expressiv training for user " &lt;&lt; userID &lt;&lt; " RESET!" &lt;&lt; std::endl; break; } case EE_ExpressivNoEvent: default: //@@ unhandled case assert(0); return; } promptUser(); } bool handleUserInput() { static std::string inputBuffer; char c = getch(); if ((int)c == 10) { std::cout &lt;&lt; std::endl; std::string command; const size_t len = inputBuffer.length(); command.reserve(len); // Convert the input to lower case first for (size_t i=0; i &lt; len; i++) { command.append(1, tolower(inputBuffer.at(i))); } inputBuffer.clear(); bool success = parseCommand(command, std::cout); promptUser(); return success; } else { if ((int)c == 127) { // Backspace key if (inputBuffer.length()) { putchar('\b'); putchar(' '); putchar('\b'); inputBuffer.erase(inputBuffer.end()-1); } } else { std::cout &lt;&lt; c; if(((int) c == 32) || ((int)c == 95) || (((int)c &gt;= 97 &amp;&amp; (int)c &lt;=122)) || (((int)c &gt;=48 &amp;&amp; (int)c &lt;= 57))) inputBuffer.append(1,c); } } return true; } void promptUser() { std::cout &lt;&lt; "ExpressivDemo&gt; "&lt;&lt;std::endl; } void nonblocking() { tcgetattr(0, &amp;initial_settings); new_settings = initial_settings; new_settings.c_lflag &amp;= ~ICANON; new_settings.c_lflag &amp;= ~ECHO; //new_settings.c_lflag &amp;= ~ISIG; new_settings.c_cc[VMIN] = 0; new_settings.c_cc[VTIME] = 0; tcsetattr(0, TCSANOW, &amp;new_settings); } int getch() { int r; unsigned char c=0; if((r = read(0, &amp;c, sizeof(c))) &lt; 0 ) { return r; } else { return c; } } int createSocket() { struct sockaddr_in si_other; int s, slen = sizeof(si_other); if ((s=socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP))==-1) std::cout&lt;&lt;"socket"&lt;&lt;std::endl; memset((char *) &amp;si_other, 0, sizeof(si_other)); si_other.sin_family = AF_INET; si_other.sin_port = htons(startSendPort); if (inet_aton("127.0.0.1", &amp;si_other.sin_addr)==0) { std::cout&lt;&lt;"intet_aton failed !"&lt;&lt;std::endl; //exit(1); } if(connect(s,(sockaddr*)&amp;si_other,slen)==-1) { std::cout&lt;&lt;"connect failed !"&lt;&lt;std::endl; // exit(1); } return s; } </code></pre>
 

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