[gnumeric] Deps: debug improvements.

[Morten Welinder <mortenw src gnome org>]

commit a7f4351ecd73552e352d9c15b18f37905e817ff3
Author: Morten Welinder <terra gnome org>
Date:   Sat Mar 12 14:39:55 2022 -0500

    Deps: debug improvements.

 src/dependent.c | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)
---
diff --git a/src/dependent.c b/src/dependent.c
index 9ba25c6c7..5615bf0f4 100644
--- a/src/dependent.c
+++ b/src/dependent.c
@@ -43,6 +43,7 @@
 static gboolean gnm_cell_eval_content (GnmCell *cell);
 static void dependent_changed (GnmDependent *dep);
 static void dependent_clear_dynamic_deps (GnmDependent *dep);
+static const char *dep_name (GnmDependent *dep);
 
 typedef enum {
        DEP_LINK_NON_SCALAR = 1,
@@ -3054,6 +3055,18 @@ dependent_debug_name (GnmDependent const *dep, GString *target)
        dependent_debug_name_for_sheet (dep, NULL, target);
 }
 
+static const char *
+dep_name (GnmDependent *dep)
+{
+       static GString *s = NULL;
+       if (!s)
+               s = g_string_new (NULL); // Leaked
+       g_string_truncate (s, 0);
+       dependent_debug_name (dep, s);
+       return s->str;
+}
+
+
 
 static void
 dump_range_dep (DependencyRange const *deprange, Sheet *sheet, GHashTable *alldeps)
@@ -3237,7 +3250,6 @@ gnm_dep_container_dump (GnmDepContainer const *deps,
                g_hash_table_iter_init (&hiter, alldeps);
                while (g_hash_table_iter_next (&hiter, &key, NULL)) {
                        GnmDependent *dep = key;
-                       GString *nstr = g_string_new (NULL);
                        GnmParsePos pp;
                        char *estr;
 
@@ -3246,9 +3258,7 @@ gnm_dep_container_dump (GnmDepContainer const *deps,
                                ? gnm_expr_top_as_string (dep->texpr, &pp, sheet_get_conventions (dep->sheet))
                                : g_strdup ("(null)");
 
-                       dependent_debug_name (dep, nstr);
-                       g_printerr ("    %s: %s\n", nstr->str, estr);
-                       g_string_free (nstr, TRUE);
+                       g_printerr ("    %s: %s\n", dep_name (dep), estr);
                        g_free (estr);
                }
        }