ctest loads the unpatched libraries, so an import that nid_patcher renames only fails when a title loads the patched prx #1827

Every test puts libs/unpatched on its path (RUNTIME_OUTPUT_DIRECTORY in core/libs/CMakeLists.txt, PATH=path_list_prepend:$<TARGET_FILE_DIR:...> in the test definitions). Titles load build/core/libs/libs/*.prx, which nid_patcher has rewritten. Its rule (core/libs/nid/src/NidResolver.cpp:40-62) keeps a host export's name only if libc exports it too, it ends in _nid_no_patch, or it starts with SDL_. Every other export is renamed to its hash. On the import side only _nid_postfix and sce* names are rewritten.

So a library that calls a plain C++ helper from another library links, passes every test and CI, and then fails to load for every title. #1613 is an example: libScePosixForWebKit.prx imports _ZN12GuestSockets6IsOpenEi from libkernel. In the patched libkernel that export is renamed, and on Windows the module fails with GetLastError: 127, so OpenGL Showcase (PPSA99005) no longer starts (details in #1613).

On main 4b6ab6b all 122 patched libraries load on Windows, so nothing is broken today. Nothing checks it, though: tools/import_audit.py checks a title's imports, and nid_patcher_dynamic_strings/nid_patcher_symbol_versions cover one fixture on Linux only.

A test that loads each patched .prx with its imports bound would catch it. PR to follow.

Found with AI assistance (Claude Code).