free(): Invalid pointer when specifying bool flags on program finish

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I have a program parsing some required options, some optional options, and I'm trying to also check if some flags are set. From what I understand, I need to:

• initialise a bool like bool testBool = false
• add option to parser like | lyra::opt(testBool)["-t"]["--testbool"]("Test bool");
  After this, I can then parse argc and argv, and check for testBool being passed like if (testBool) { std::cout << "TestBool = y" << std::endl; }
  However, if I have any bools in my lyra arg parser, my program seems to work fine until my main function returns, after which I get

free(): invalid pointer
Aborted: core dumped

if I pass -t to my executable.
Does anyone else experience this issue? (There is a decent chance that this is not actually a problem with lyra itself, but maybe a problem with my c++ skills, I am very new to this lang)