"hash_extender: Couldn't parse argument" with example from readme (on ARM m2 mac and vm arm ubuntu)

[zer0guz]

➜  hash_extender ./hash_extender --data data --secret 6 --append append --signature 6036708eba0d11f6ef52ad44e8b74d5b --format sha256

hash_extender: Couldn't parse argument

this is the output im getting when running the readme example...

additionally the selftest segfaults:

➜  hash_extender ./hash_extender_test                                                                                               

md4: Testing some basic hash data...
md4: Testing hash data of various lengths...
md5: Testing some basic hash data...
md5: Testing hash data of various lengths...
ripemd160: Testing some basic hash data...
ripemd160: Testing hash data of various lengths...
sha: Testing some basic hash data...
sha: Testing hash data of various lengths...
sha1: Testing some basic hash data...
sha1: Testing hash data of various lengths...
sha256: Testing some basic hash data...
sha256: Testing hash data of various lengths...
sha512: Testing some basic hash data...
sha512: Testing hash data of various lengths...
sm3: Testing some basic hash data...
[1]    72710 segmentation fault (core dumped)  ./hash_extender_test

running on arm ubuntu 22.04 vm on arm mac m2

[sambowne]

I fixed it with this change:

In hash_extender.c, line 296, change EOF to 255

Here's my forked repository that compiles with "make" on Debian 12: https://github.com/sambowne/hash_extender