Wireshark-dev: [Wireshark-dev] Re: Broken build on F36, lua related

From: Ben Greear <greearb@xxxxxxxxxxxxxxx>
Date: Wed, 26 Nov 2025 09:03:28 -0800
On 11/26/25 08:19, John Thacker wrote:
On Wed, Nov 26, 2025 at 10:50 AM John Thacker <johnthacker@xxxxxxxxx <mailto:johnthacker@xxxxxxxxx>> wrote:


    Unfortunately, Lua doesn't have a great way to determine the patch level release (LUA_VERSION_NUM only gives the major and minor release numbers) to
    determine that you're running precisely 5.4.6 or later, which is where `lua_closethread` is available. Luckily the "deprecation" isn't actually enforced. As
    a comment in the code in `epan/wslua/init_wslua.c` notes, the plan is to use an ifdef by the time Lua 5.5 is released (where they may, or may not, actually
    deprecate it for real.).


Lua 5.4 has LUA_VERSION_RELEASE_NUM (Lua 5.3 has the release number only separate or as a string) which makes it easier to check. I'm not particularly  > interested in fixing the issue for one broken release of Lua, but if you really have to get it running on that version it's not too hard to patch that file.

This seems to fix the build on F36.  Would you want this patch upstream assuming
it works for others?

[greearb@vb-f36-64 wireshark]$ git diff
diff --git a/epan/wslua/init_wslua.c b/epan/wslua/init_wslua.c
index e33b2b2ae4..79cdcd1a0d 100644
--- a/epan/wslua/init_wslua.c
+++ b/epan/wslua/init_wslua.c
@@ -283,7 +283,11 @@ static void lua_resetthread_cb(void *user_data) {
     // relies on garbage collection only.
     // lua_closethread(..., NULL) was introduced in 5.4.6 to replace
     // lua_resetthread() but it's not mandatory yet (maybe in 5.5?)
+#if LUA_VERSION_RELEASE_NUM == 50404
+    lua_resetthread(L1, NULL);
+#else
     lua_resetthread(L1);
+#endif
 #endif
     // The thread was pushed onto the global stack when created. Each thread
     // should be taken off the stack in order.


Thanks,
Ben


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--
Ben Greear <greearb@xxxxxxxxxxxxxxx>
Candela Technologies Inc  http://www.candelatech.com