[Bug-gsl] problems with gsl_cdf_gamma_Pinv and gsl_cdf_beta_Pinv

[Mike L. Hogan]

The version number of GSL    version 2.5

The hardware and operating system     OS is CentOS version 7 (Core)
Hardware Dell PowerEdge R940 running Intel(R) Xeon(R) Platinum 8270 CPU

The compiler used, including version number and compilation options

g++ -g -O0 -lm -ldl /usr/lib64/libtdsodbc.so.0 /usr/lib64/libtdsS.so 
/usr/lib64/libgsl.so /usr/lib64/libglpk.so.0.25.0 /usr/lib64/libgslcblas.so 
-lboost_date_time -lboost_filesystem -Wl -I  ../../include -I 
/usr/local/include /usr/lib64/libtdsodbc.so.0 /usr/lib64/libtdsS.so 
/usr/lib64/libgsl.so /usr/lib64/libglpk.so.0.25.0 /usr/lib64/libgslcblas.so 
-lboost_date_time -lboost_filesystem inverse_cumulant_errors.o -o 
../../binTest/inverse_cumulant_errors.debug


A description of the bug behaviour  The routine shown below terminate with the 
message 'gsl: gammainv.c:111: ERROR: inverse failed to converge'.  That is, of 
course,only the first of the 2 routines.  I include the other so that you can 
see the parameters with which it bombs.   We have (btw) other working code 
using gsl routines.


A short program which exercises the bug


#include <iostream>
#include <fstream>
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <string.h>
#include <iomanip>
#include <vector>
#include <set>
#include <algorithm>
#include <gsl/gsl_math.h>
#include <gsl/gsl_rng.h>
#include <gsl/gsl_randist.h>
#include <gsl/gsl_errno.h>
#include <gsl/gsl_cdf.h>

int main (int argc, char **argv) {
   double x;
x = gsl_cdf_gamma_Pinv( 0.0009999999999999998, 0.099999999999999978, 1.0);
         x =  gsl_cdf_beta_Pinv(.562, .01, .99);

        exit(0);
}




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