This is to do with an ancient but favourite of mine astro application called "starplot". Its development has ceased since 2007 but it is still in the Debian repo. When I install it with apt-get and run it from the command line I get the error message
"*** Error in `starplot': free(): invalid pointer: 0x00007fa0711c6f50 *** Aborted.
I then tried compiling it from source, but after running it from the command line I get a similar message:
*** Error in `/usr/local/test/bin/starplot': free(): invalid pointer: 0x00007f1fa7207f50 *** Aborted.
I am using in Sparky the gcc compiler version 5.2.1 20151003 (Debian 5.2.1-21). The solution I found was to compile starplot on my Neptune Linux partition, and copy over the Neptune install to my Sparky partition. In Neptune, my gcc version is 4:4.7.2-1 which is essentially Debian Stable. Sparky I realise is based on Debian Testing.