c++ - Error while pushing a std::pair in std::vector -

c++ - Error while pushing a std::pair in std::vector -

i found doing force in

template < class a, class b > std::vector < std::pair < a, b > >::push_back(...)

almost creates segmentation fault.

i looked around bit , found there error beingness raised stl_uninitialized.h (line 269).

the easiest work around found reserve required / big space vector , force back. worked i'm not convinced. why there error

(my initial code not templated. fields

std::pair < float, cv::rotatedrect >

i templated here people able give generic answers).

declaration of localdetections :

std::vector < std::vector < std::pair < float, cv::rotatedrect> > > localdetections; localdetections.resize(m_allsizes.size());

where m_allsizes vector of no. of sizes used search , populate . status :

for (int sit down = 0 ; sit down < m_allsizes.size(); sit++) {

place used :

cv::rotatedrect ouprect; cv::point2d src_center(img.cols/2., img.rows/2.); rotaterectinspace(newrect, ouprect, src_center, -(rotatedangle)); std::pair<float, cv::rotatedrect> newpair((float)finval, ouprect); localdetections[sit].push_back(newpair);

sit variable in loop goes 0 through size of localdectections.

there potential bug in code sit overflow negative numbers. may want convert sit vector::size_type, or utilize iterators, or push_back vectors onto localdetections part of loop instead of resizing beforehand.

alternatively, bad may going on when trying re-create or assign cv::rotatedrect ouprect.

there lot of unknowns on one. there's nil wrong code posted. debugger going help more stackoverflow.

c++ vector stl std-pair