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-rw-r--r--util/debug.lua27
1 files changed, 16 insertions, 11 deletions
diff --git a/util/debug.lua b/util/debug.lua
index 1d3b5648..321b3267 100644
--- a/util/debug.lua
+++ b/util/debug.lua
@@ -119,21 +119,26 @@ end
function _traceback(thread, message, level)
- if type(thread) ~= "thread" then
+ -- Lua manual says: debug.traceback ([thread,] [message [, level]])
+ -- I fathom this to mean one of:
+ -- ()
+ -- (thread)
+ -- (message, level)
+ -- (thread, message, level)
+
+ if thread == nil then -- Defaults
+ thread, message, level = coroutine.running(), message, level;
+ elseif type(thread) == "string" then
thread, message, level = coroutine.running(), thread, message;
+ elseif type(thread) ~= "thread" then
+ return nil; -- debug.traceback() does this
end
- if level and type(message) ~= "string" then
- return nil, "invalid message";
- elseif not level then
- if type(message) == "number" then
- level, message = message, nil;
- else
- level = 1;
- end
- end
-
+
+ level = level or 1;
+
message = message and (message.."\n") or "";
+ -- +3 counts for this function, and the pcall() and wrapper above us
local levels = get_traceback_table(thread, level+3);
local last_source_desc;