c++ - Debugging run time error of armadillo package -

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i using armadillo c++ library developing rcpp package. finding debugging run time errors armadillo extremely cumbersome. have insert printout after every line fish out line @ errors coming. armadillo throw errors like:

error: subtraction: incompatible matrix dimensions: 756x1 , 26x1

and not tell information line number. using gdb not particularly helpful because error might coming after many iterations. there better line number of error occurring.

i not know rcpp integration, debug armadillo code using gdb.

just make sure never catch exceptions std::logic_error in code. if run program within gdb, abort once error occurs , typing bt nice trace shows line blame. , inspect variable values etc. in stack frame.

you not need step through code make use of advantages of debugger.

if rcpp not allow avoiding catch exception, should able write simple c++ test program code not block debugger.


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