[gnutls-devel] GnuTLS | tls13/compress-cert-neg2 test fails only when run inside Guix build container (#1634)

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Zoltán Fridrich commented: https://gitlab.com/gnutls/gnutls/-/issues/1634#note_2286569425


Hello, it seems that the zlib is present on the system which is why the test isn't skipped. But when gnutls tries to initialize zlib it fails to `dlopen` it (call to `gnutls_zlib_ensure_library` fails). There are a couple options I see that might be the cause of the problem: either the `Z_LIBRARY_SONAME` was not generated correctly or wasn't generated at all by gnutls in which case the `dlopen` would fail to find the file or the zlib library is present but not accessible which would cause `dlopen` to fail. However I am not sure there is a way for you to check which one of these options it is without actually running a debugger or modifying the code. To further understand what is going on it would be necessary to find out what the `Z_LIBRARY_SONAME` value is and what error code is returned from `gnutls_zlib_ensure_library`.

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