Added a Windows-specific guard in waitline() that checks _get_osfhandle(sok) before calling read() in non-socket mode; if the CRT file descriptor is invalid, it now fails gracefully with -1 instead of hitting the debug CRT assertion you reported.
Updated the Python plugin Visual Studio project to also undefine _DEBUG and Py_DEBUG (in both Release|Win32 and Release|x64), alongside the existing Py_REF_DEBUG and Py_TRACE_REFS, to avoid pulling in debug-only Python refcount symbols during linking.
Updated the Windows Python plugin project file to explicitly undefine Py_REF_DEBUG and Py_TRACE_REFS in both Release|Win32 and Release|x64 compile settings, preventing the build from pulling in CPython debug-refcount import symbols that are missing from normal Python import libraries.
Updated the Python plugin Visual Studio project to define Py_NO_LINK_LIB in both Release|Win32 and Release|x64 configurations, so CPython headers won’t auto-link a debug import library like python314_d.lib.
Kept explicit linker input ("$(Python3Lib).lib") unchanged, so linking continues to use the configured Python library from project properties.
Wrapped shortcut-folder setup with existence checks and explicit GError handling so invalid config paths don’t propagate into GTK chooser failures/crashes on Windows.
Removed an unused get_xdir_fs extern declaration from this function while introducing a single xdir value reused across chooser setup logic.
Added type guards before using the stored plugin view/model (GTK_IS_TREE_VIEW, GTK_IS_LIST_STORE) so stale or unexpected object data doesn’t get dereferenced.
Switched plugin list population to always pass non-null strings for name/version/description via plugingui_safe_string, preventing null string propagation into GTK model setters.
Added an unload guard for empty/null modname before calling unload logic, preventing unsafe calls into plugin teardown paths with invalid identifiers.
fe_pluginlist_update() now guards against pl == NULL, pl->version == NULL, and pl->filename == NULL before dereferencing, and uses safe empty-string fallbacks for filename-backed columns. This prevents null dereferences from malformed or partially-populated plugin entries.
plugingui_unload() now early-returns when the selected plugin filepath is NULL/empty before suffix checks and command formatting, preventing invalid string operations in unload flow.
Updated plugin Unload and Reload callbacks to use the guarded session helper before issuing command-based unload/reload for script plugins, and to exit cleanly when no session is available.
Fixed plugin list layout sizing by forcing the tree view’s scrolled container to expand/fill inside the plugin window’s vbox, so the loaded-plugins list now uses full available height above the button row.
Added a defensive check that reports a user-facing error ("No active session available for loading addons.") and exits early when no valid session exists, instead of calling handle_command() with invalid state.
Updated the file request call to pass NULL userdata for load operations, so the callback no longer retains a stale session pointer while the chooser is open.
Fixed the single-file open path in gtkutil_file_req_done() to fetch the filename once and only call gtkutil_check_file() when a non-NULL filename is returned, preventing the crash path when GTK returns no file on accept/load.
Moved all wildcard-based includes (*.dll, **\*, etc.) into an ItemGroup inside the Build target so they’re evaluated at build time instead of as VC project item definitions, preserving the copy behavior
