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Rust would warn you of an unused variable: "warning: value assigned to `psize` is never read"

And so would GCC: warning: variable psize set but not used [-Wunused-but-set-variable]

The fact that the bug slipped through the cracks highlights the importance of sane defaults.

The warning is in the -Wall warning set, which tbh should be the bare minimum each C/C++ project enables (along with -Wextra, and -Werror).