Hello Wesley Schwengle, I am not sure anymore if the error I received is the same you got. Therefore, if you can still reproduce this issue, can you please run pdfsig inside a debugger like below and forward the output to this bug? You would at least need to install the package 'gdb'.
gdb -q -ex 'set width 0' -ex 'set pagination off' -ex 'run' -ex 'display/i $pc' -ex 'bt' -ex 'detach' -ex 'quit' --args pdfsig ~/Downloads/bar.pdf This should print the required information when the segfault is reached automatically and should need no more user input. Kind regards, Bernhard