Test case for uECC, where it seems that libsecp256k1 can't verify all signatures generated by uECC.
git, gcc
python3 libsecp256k1: python3 -m pip install --user secp256k1
git clone https://github.com/kristofferkoch/micro-ecc-test
cd micro-ecc-test
git submodule init
git submodule update # Download micro-ecc
tup || bash build.sh
Running the test will only sometimes fail:
while bash test.sh; do echo "ok" ; done