[gjs: 14/18] function: Improve debug message

[Philip Chimento <pchimento src gnome org>]

commit c450db94af706718f7a8587b3776fa56637d8e4a
Author: Philip Chimento <philip chimento gmail com>
Date:   Mon Dec 2 21:34:39 2019 -0800

    function: Improve debug message
    
    If a callback terminated with an uncatchable exception, then instead of
    printing only the callback's type in the error message, also print its
    display name, and also the namespace of its GI type.

 gi/function.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/gi/function.cpp b/gi/function.cpp
index bec2f9ed..49681ac3 100644
--- a/gi/function.cpp
+++ b/gi/function.cpp
@@ -436,7 +436,10 @@ out:
                 exit(code);
 
             /* Some other uncatchable exception, e.g. out of memory */
-            g_error("Function %s terminated with uncatchable exception",
+            JSFunction* fn = gjs_closure_get_callable(trampoline->js_function);
+            g_error("Function %s (%s.%s) terminated with uncatchable exception",
+                    gjs_debug_string(JS_GetFunctionDisplayId(fn)).c_str(),
+                    g_base_info_get_namespace(trampoline->info),
                     g_base_info_get_name(trampoline->info));
         }