MINOR: hlua: don't dump empty entries in hlua_traceback()
Calling hlua_traceback() sometimes reports empty entries looking like:
[C]: ?
These ones correspond to certain internal C functions of the Lua library,
but they do not provide any information and even complicate the
interpretation of the dump. Better just skip them.
diff --git a/src/hlua.c b/src/hlua.c
index 33f054d..0959be5 100644
--- a/src/hlua.c
+++ b/src/hlua.c
@@ -505,11 +505,6 @@
struct buffer *msg = get_trash_chunk();
while (lua_getstack(L, level++, &ar)) {
-
- /* Add separator */
- if (b_data(msg))
- chunk_appendf(msg, "%s", sep);
-
/* Fill fields:
* 'S': fills in the fields source, short_src, linedefined, lastlinedefined, and what;
* 'l': fills in the field currentline;
@@ -518,6 +513,14 @@
*/
lua_getinfo(L, "Slnt", &ar);
+ /* skip these empty entries, usually they come from deep C functions */
+ if (ar.currentline < 0 && *ar.what == 'C' && !*ar.namewhat && !ar.name)
+ continue;
+
+ /* Add separator */
+ if (b_data(msg))
+ chunk_appendf(msg, "%s", sep);
+
/* Append code localisation */
if (ar.currentline > 0)
chunk_appendf(msg, "%s:%d: ", ar.short_src, ar.currentline);