Looks like upstream fixed it in this commit: https://github.com/zxing-cpp/zxing-cpp/commit/82806f5f92173b8cb4e1e9bee13a2d07a33fb69f
But there is no released tag with it yet. May be above can be applied as a patch in the interim. Shmerl.
- Bug#1095196: libzxing3: Build with NDEBUG to prevent thresholds_new... Shmerl
- Bug#1095196: Upstream fix Shmerl
