vis-lua: do not report errors recursively

Displaying an error might create a new window which in turn can
trigger new events (all other windows are resized+redrawn) which
might again cause errors.

There is still no sane way to exit the editor in this case, but
at least the error messages should be readable.

1 files changed, 4 insertions, 0 deletions

diff --git a/vis-lua.c b/vis-lua.c
index fdc4fd2..eb54576 100644
--- a/vis-lua.c
+++ b/vis-lua.c
@@ -135,12 +135,16 @@ static void stack_dump(lua_State *L, const char *format, ...) {
 
 static int error_function(lua_State *L) {
 	Vis *vis = lua_touserdata(L, lua_upvalueindex(1));
+	if (vis->errorhandler)
+		return 1;
+	vis->errorhandler = true;
 	size_t len;
 	const char *msg = lua_tostring(L, 1);
 	if (msg)
 		luaL_traceback(L, L, msg, 1);
 	msg = lua_tolstring(L, 1, &len);
 	vis_message_show(vis, msg);
+	vis->errorhandler = false;
 	return 1;
 }