问题：
defe@defe-Precision-Tower-3620:~/project/Demo/UseG2OforPoseGraph/useg2oforposegraph$ ./g2o_viewer sphere.g2o
*** Error in `./g2o_viewer‘: realloc(): invalid pointer: 0x00007fcb7e519820 ***
解决方案：
** Error in `./g2o_viewer': realloc(): invalid pointer:
原文：http://www.cnblogs.com/defe-learn/p/6856576.html