# HG changeset patch
# User jbe
# Date 1427369160 -3600
# Node ID e00d11c12b689e665bb857a2aaea60a897689177
# Parent  8cf6d927d07447c082a3290450503e8e01ee09ec
trace.debug(...) now handles nil values properly

diff -r 8cf6d927d074 -r e00d11c12b68 framework/env/trace/debug.lua
--- a/framework/env/trace/debug.lua	Thu Mar 26 12:25:19 2015 +0100
+++ b/framework/env/trace/debug.lua	Thu Mar 26 12:26:00 2015 +0100
@@ -1,19 +1,21 @@
 --[[--
-trace.debug(...)
-  ...     -- messages to be inserted into the trace log
+trace.debug(
+  value1,     -- value to be converted to a string and included in the debug output
+  value2,     -- another value to be converted to a string and included in the debug output
+  ...
+)
 
 
-This function can be used to include debug output in the trace log.
+This function can be used to include debug output in the trace log. Each argument is converted to a string (using tostring(...)) and all results are concatenated with a single space character between them.
 
 --]]--
 
 function trace.debug(...)
   if not trace._disabled then
-    local message = ""
-    local arg = {...}
-    for i= 1,#arg,1 do
-      message = message..tostring(arg[i]).." "
+    local values = {}
+    for i = 1, select("#", ...) do
+      values[i] = tostring((select(i, ...)))
     end
-    trace._new_entry{ type = "debug", message = message }
+    trace._new_entry{ type = "debug", message = table.concat(values, " ") }
   end
 end