From 614c9322d50052c76fb3e6e1be7536a972ff0902 Mon Sep 17 00:00:00 2001
From: phanium <91544758+phanen@users.noreply.github.com>
Date: Tue, 25 Feb 2025 05:34:49 +0800
Subject: fix(lua): SIGSEGV in luv callback with error(nil) #32595

Problem:
luv callback `vim.uv.new_timer():start(0, 0, function() error() end)`
causes SIGSEGV, since `xstrdup` gets NULL from `lua_tostring`.
Similar to: https://github.com/neovim/neovim/commit/a5b1b83a2693ffa7a5a0a22b3693d36ea60051be

Solution:
Check NULL before `xstrdup`.
---
 src/nvim/lua/executor.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/nvim/lua/executor.c b/src/nvim/lua/executor.c
index 71c5cd4585..17009446e4 100644
--- a/src/nvim/lua/executor.c
+++ b/src/nvim/lua/executor.c
@@ -221,7 +221,7 @@ static int nlua_fast_cfpcall(lua_State *lstate, int nargs, int nresult, int flag
     const char *error = lua_tostring(lstate, -1);
 
     multiqueue_put(main_loop.events, nlua_luv_error_event,
-                   xstrdup(error), (void *)(intptr_t)kCallback);
+                   error != NULL ? xstrdup(error) : NULL, (void *)(intptr_t)kCallback);
     lua_pop(lstate, 1);  // error message
     retval = -status;
   } else {  // LUA_OK
-- 
cgit