Runtime crash when initializing fhe.array with encrypted input at the last position

Zama Concrete
1

I encountered a hard crash during the execution of a compiled circuit. I guess this is not an intended behavior? At least, we should raise a proper runtime error? :thinking:

The crash seems to be triggered when initializing an fhe.array where the last element is an encrypted input, and here is a minimal reproducible example:

from concrete import fhe
configuration = fhe.Configuration()

@fhe.compiler({'x': 'encrypted'})
def array_debug(x):
    init_vector = fhe.array([0, 1, x])
    scaled_vector = fhe.constant(4) * init_vector
    extracted_val = scaled_vector[2]
    return extracted_val + x

if __name__ == '__main__':
    x = 2
    expect_result = array_debug(x)
    
    inputset = fhe.inputset(fhe.int8)
    circuit = array_debug.compile(inputset, configuration=configuration)
    circuit.keygen()
    encrypted_x = circuit.encrypt(x)
    encrypted_result = circuit.run(encrypted_x)

The output is:

malloc(): corrupted top size
Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it):
0  libConcretelangBindingsPythonCAPI.so 0x0000794ea8286221 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) + 225
1  libConcretelangBindingsPythonCAPI.so 0x0000794ea8283c34
2  libc.so.6                            0x0000794ffd042520
3  libc.so.6                            0x0000794ffd0969fc pthread_kill + 300
4  libc.so.6                            0x0000794ffd042476 raise + 22
5  libc.so.6                            0x0000794ffd0287f3 abort + 211
6  libc.so.6                            0x0000794ffd089677
7  libc.so.6                            0x0000794ffd0a0cfc
...