Commit: patch 9.2.0294: if_lua: lua interface does not work with lua 5.5

[Christian Brabandt]

patch 9.2.0294: if_lua: lua interface does not work with lua 5.5

Commit: https://github.com/vim/vim/commit/22db4a3c57a9921ba164a905f84120cfa5dbccfe
Author: Yee Cheng Chin <ychi...@gmail.com>
Date: Sat Apr 4 08:37:47 2026 +0000

patch 9.2.0294: if_lua: lua interface does not work with lua 5.5

Problem: if_lua: lua interface does not work with lua 5.5
(Lyderic Landry)
Solution: Use the new lua API `luaL_openselectedlibs()`
(Yee Cheng Chin)

Lua 5.5 removed the API function `openlibs` with `openselectedlibs`,
with `luaL_openlibs` replaced by a macro that just calls the new
`luaL_openselectedlibs` in the headers (see lua/lua@d738c8d18). This
broke Vim's dynamic Lua build as we try to redefine `luaL_openlibs`
ourselves and also this function can no longer be loaded from the lib.
Update the code to use the new API call instead to fix the issue.

fixes: #19814
closes: #19842
closes: #19909

Signed-off-by: Yee Cheng Chin <ychi...@gmail.com>
Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/src/if_lua.c b/src/if_lua.c
index 7321af268..fc2e392f2 100644
--- a/src/if_lua.c
+++ b/src/if_lua.c
@@ -215,7 +215,11 @@ static void luaV_call_lua_func_free(void *state);
# define luaopen_os dll_luaopen_os
# define luaopen_package dll_luaopen_package
# define luaopen_debug dll_luaopen_debug
-# define luaL_openlibs dll_luaL_openlibs
+# if LUA_VERSION_NUM >= 505
+# define luaL_openselectedlibs dll_luaL_openselectedlibs
+# else
+# define luaL_openlibs dll_luaL_openlibs
+# endif

// lauxlib
# if LUA_VERSION_NUM <= 501
@@ -331,7 +335,11 @@ int (*dll_luaopen_io) (lua_State *L);
int (*dll_luaopen_os) (lua_State *L);
int (*dll_luaopen_package) (lua_State *L);
int (*dll_luaopen_debug) (lua_State *L);
+# if LUA_VERSION_NUM >= 505
+void (*dll_luaL_openselectedlibs) (lua_State *L, int load, int preload);
+# else
void (*dll_luaL_openlibs) (lua_State *L);
+# endif

typedef void **luaV_function;
typedef struct {
@@ -439,7 +447,11 @@ static const luaV_Reg luaV_dll[] = {
{"luaopen_os", (luaV_function) &dll_luaopen_os},
{"luaopen_package", (luaV_function) &dll_luaopen_package},
{"luaopen_debug", (luaV_function) &dll_luaopen_debug},
+# if LUA_VERSION_NUM >= 505
+ {"luaL_openselectedlibs", (luaV_function) &dll_luaL_openselectedlibs},
+# else
{"luaL_openlibs", (luaV_function) &dll_luaL_openlibs},
+# endif
{NULL, NULL}
};

@@ -2570,7 +2582,11 @@ luaopen_vim(lua_State *L)
luaV_newstate(void)
{
lua_State *L = luaL_newstate();
+# if LUA_VERSION_NUM >= 505
+ luaL_openselectedlibs(L, ~0, 0); // core libs
+# else
luaL_openlibs(L); // core libs
+# endif
lua_pushcfunction(L, luaopen_vim); // vim
lua_call(L, 0, 0);
return L;
diff --git a/src/version.c b/src/version.c
index 50474f4ac..41d345cba 100644
--- a/src/version.c
+++ b/src/version.c
@@ -734,6 +734,8 @@ static char *(features[]) =

static int included_patches[] =
{ /* Add new patch number below this line */
+/**/
+ 294,
/**/
293,
/**/