From 2c90cac08fb74e910a4833b01baee3d5db792f73 Mon Sep 17 00:00:00 2001
From: Thomas White <taw@physics.org>
Date: Sun, 3 Sep 2017 22:14:44 +0200
Subject: debugger: Avoid problems when a run gets deleted

---
 src/debugger.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src')

diff --git a/src/debugger.c b/src/debugger.c
index 531969c..32cea14 100644
--- a/src/debugger.c
+++ b/src/debugger.c
@@ -207,6 +207,7 @@ static gboolean draw_sig(GtkWidget *da, cairo_t *cr, struct debugwindow *dbgw)
 	double ypos = 10.0;
 	int dpos = 0;
 	int changesig = 0;
+	int npr = 10;  /* Not zero */
 
 	/* Background */
 	width = gtk_widget_get_allocated_width(GTK_WIDGET(da));
@@ -229,6 +230,10 @@ static gboolean draw_sig(GtkWidget *da, cairo_t *cr, struct debugwindow *dbgw)
 
 		enum para_type t = para_type(dbgw->fr->paras[i]);
 
+		/* Jump the "old values" pointer forward to the next paragraph start */
+		while ( dbgw->runs[dpos].np == npr ) dpos++;
+		npr = dbgw->runs[dpos].np;
+
 		plot_hr(cr, &ypos, width);
 		snprintf(tmp, 255, "Paragraph %i: type %s", i, str_type(t));
 		plot_text(cr, &ypos, fontdesc, tmp);
-- 
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