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While a function pointer may be cast to another function pointer type, it is required to cast the function pointer back to the original function pointer type before calling it. If a parameter is a pointer the exact pointer type is required. Using a pointer to a different underlying type is technically undefined behavior. The wrapper functions `ft_gzip_alloc` and `ft_gzip_free` took `FT_Memory` (a `FT_MemoryRec_*`) instead of `voidpf` (`void*`), so when gzip calls these callbacks through `alloc_func` or `free_func` it invokes undefined behavior. On most platforms this works out as expected, but newer undefined behavior detectors and targets like wasm can detect this and will produce an error. * src/gzip/ftgzip.c (ft_gzip_alloc, ft_gzip_free): Update signatures to exactly match `alloc_func` and `free_func`, respectively. Internally, cast the `void*` opaque pointer to `FT_Memory`. |
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| .. | ||
| adler32.c | ||
| ftgzip.c | ||
| ftzconf.h | ||
| infblock.c | ||
| infblock.h | ||
| infcodes.c | ||
| infcodes.h | ||
| inffixed.h | ||
| inflate.c | ||
| inftrees.c | ||
| inftrees.h | ||
| infutil.c | ||
| infutil.h | ||
| rules.mk | ||
| zlib.h | ||
| zutil.c | ||
| zutil.h | ||