<p><b>@mattcaswell</b> requested changes on this pull request.</p>

<hr>

<p>In <a href="https://github.com/geany/geany-plugins/pull/645#discussion_r191953485">debugger/src/cell_renderers/cellrendererbreakicon.c</a>:</p>
<pre style='color:#555'>>      
        cell->enabled = TRUE;
        cell->condition = NULL;
        cell->hitscount = 0;
-       
-       cell_renderer->mode = GTK_CELL_RENDERER_MODE_ACTIVATABLE;
+
+       g_value_init(&mode, G_TYPE_ENUM);
</pre>
<p>This should be:</p>
<pre><code>g_value_init(&mode, GTK_TYPE_CELL_RENDERER_MODE);
</code></pre>
<p>Otherwise you get errors like this:</p>
<pre><code>(geany:16953): GLib-GObject-WARNING **: 00:27:20.736: ../../../../gobject/gvalue.c:188: cannot initialize GValue with type 'GEnum', this type is abstract with regards to GValue use, use a more specific (derived) type

(geany:16953): GLib-GObject-CRITICAL **: 00:27:20.736: g_value_set_enum: assertion 'G_VALUE_HOLDS_ENUM (value)' failed

(geany:16953): GLib-GObject-CRITICAL **: 00:27:20.736: g_value_transform: assertion 'G_IS_VALUE (src_value)' failed

(geany:16953): GLib-GObject-WARNING **: 00:27:20.736: unable to set property 'mode' of type 'GtkCellRendererMode' from value of type '(null)'
</code></pre>

<hr>

<p>In <a href="https://github.com/geany/geany-plugins/pull/645#discussion_r191953790">debugger/src/cell_renderers/cellrenderertoggle.c</a>:</p>
<pre style='color:#555'>> @@ -53,7 +53,12 @@ static gint cell_renderer_toggle_activate(GtkCellRenderer *cell, GdkEvent *event
 static void cell_renderer_toggle_init (CellRendererToggle *cell)
 {
        GtkCellRenderer *cell_renderer = (GtkCellRenderer*)cell;
-       cell_renderer->mode = GTK_CELL_RENDERER_MODE_ACTIVATABLE;
+       GValue mode = G_VALUE_INIT;
+
+       g_value_init(&mode, G_TYPE_ENUM);
</pre>
<p>Again this should be:</p>
<pre><code>g_value_init(&mode, GTK_TYPE_CELL_RENDERER_MODE);
</code></pre>

<hr>

<p>In <a href="https://github.com/geany/geany-plugins/pull/645#discussion_r191954141">debugger/src/cell_renderers/cellrendererframeicon.c</a>:</p>
<pre style='color:#555'>>      cell->pixbuf_active = cell->pixbuf_highlighted = 0;
+
+       g_value_init(&mode, G_TYPE_ENUM);
</pre>
<p>Again this should be:</p>
<pre><code>g_value_init(&mode, GTK_TYPE_CELL_RENDERER_MODE);
</code></pre>
<p>I found this through testing this PR. Without doing the above you cannot change the current active frame in the stack.</p>

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