Version:           1.7.0 (using KDE 4.4.3) 
OS:                Linux

Steps to reproduce:
1) cat > testcase1.cdl <<EOF
netcdf foo {  // an example netCDF specification in CDL

dimensions:
     lat = 10, lon = 5, time = unlimited ;

variables:
     long    lat(lat), lon(lon), time(time);
     float   Z(time,lat,lon), t(time,lat,lon);
     double  p(time,lat,lon);
     long    rh(time,lat,lon);

     // variable attributes
     lat:long_name = "latitude";
     lat:units = "degrees_north";
     lon:long_name = "longitude";
     lon:units = "degrees_east";
     time:units = "seconds since 1992-1-1 00:00:00";
     Z:units = "geopotential meters";
     Z:valid_range = 0., 5000.;
     p:_FillValue = -9999.;
     rh:_FillValue = -1;

data:
     lat   = 0, 10, 20, 30, 40, 50, 60, 70, 80, 90;
     lon   = -140, -118, -96, -84, -52;
}
EOF
2) ncgen -b -o testcase1.netcdf testcase1.cdl
3) kst
4) Data Wizard
5) select testcase1.netcdf
6) select all data columns
7) Next, Next, Finish

Expected results:
7) kst opens testcase1.netcdf

Actual results:
7) kst prints

"You requested to read in over 16777215 TB of data but it seems that you have approximately only 0 TB of usable memory available. You cannot load this much data."

More info:
1) The example is from the manual page of the ncgen command that I use to generate netcdf files.
2) If I select only lat and lon columns then kst does not crash and opens the data successfully. Maybe the crash is related to the fact that other columns do not have data points in this file?
3) I am not quite sure which version of KDE is in debian unstable:

$ COLUMNS=100 dpkg -l | grep kde
ii  kde-icons-oxygen    4:4.4.4-1           transitional package for oxygen icon theme
ii  kdebase-data        4:4.4.4-1           shared data files for the KDE 4 base module
rc  kdebase-runtime     4:4.3.4-2           runtime components from the official KDE 4 release
ii  kdebase-runtime-dat 4:4.4.4-1           shared data files for the KDE 4 base runtime module
ii  kdelibs-data        4:3.5.10.dfsg.1-3   core shared data for all KDE applications
ii  kdelibs4-dev        4:3.5.10.dfsg.1-3   development files for the KDE core libraries
ii  kdelibs4c2a         4:3.5.10.dfsg.1-3   core libraries and binaries for all KDE applications
rc  kdelibs5            4:4.3.4-3           core libraries for all KDE 4 applications
rc  kdelibs5-data       4:4.3.4-3           core shared data for all KDE 4 applications
rc  libkdeedu4          4:4.3.4-1+b1        libraries for KDE 4 educational applications
rc  liblockdev1         1.0.3-1.2+b1        Run-time shared library for locking devices

suggests 4.4.4 but that option is not available in bugs.kde.org.

Reproducible: Didn't try