there's a bug in joe 2.8 still present in joe
2.9.8-pre1. The "block move" feature will almost always
fail when working in rectangle mode.
* enter in rectangle mode (^TX)
* write the following text
* position the cursor over the letter 'a'
* begin a block (^KB)
* position the cursor over the letter 'e'
* end a block (^KK)
* position the cursor over letter 'c'
* move the block (^KM)
this leads to a segmentation fault both on my debian
2.2 and on a freshly-installed redhat 7.2