diff --git a/FL/Fl_Terminal.H b/FL/Fl_Terminal.H
index 4cd53bb4a..ff0062000 100644
--- a/FL/Fl_Terminal.H
+++ b/FL/Fl_Terminal.H
@@ -455,7 +455,7 @@ protected:
     void sgr_italic(bool val)    { attrib_ = onoff(val, Fl_Terminal::ITALIC);    } // e.g. ESC[3m
     void sgr_underline(bool val) { attrib_ = onoff(val, Fl_Terminal::UNDERLINE); } // e.g. ESC[3m
     void sgr_dbl_under(bool val) { attrib_ = onoff(val, Fl_Terminal::UNDERLINE); } // e.g. ESC[21m (TODO!)
-    void sgr_blink(bool val)     { /* NOT IMPLEMENTED */                         } // e.g. ESC[5m
+    void sgr_blink(bool val)     { (void)val; /* NOT IMPLEMENTED */              } // e.g. ESC[5m
     void sgr_inverse(bool val)   { attrib_ = onoff(val, Fl_Terminal::INVERSE);   } // e.g. ESC[7m
     void sgr_strike(bool val)    { attrib_ = onoff(val, Fl_Terminal::STRIKEOUT); } // e.g. ESC[9m
   };
diff --git a/src/Fl_Text_Display.cxx b/src/Fl_Text_Display.cxx
index d1f7bb035..35545614e 100644
--- a/src/Fl_Text_Display.cxx
+++ b/src/Fl_Text_Display.cxx
@@ -1861,7 +1861,7 @@ int Fl_Text_Display::get_absolute_top_line_number() const {
   Does nothing if the absolute top line number is not being maintained.
 */
 void Fl_Text_Display::absolute_top_line_number(int oldFirstChar) {
-  if (maintaining_absolute_top_line_number()) {
+  if (maintaining_absolute_top_line_number() && buffer()) {
     if (mFirstChar < oldFirstChar)
       mAbsTopLineNum -= buffer()->count_lines(mFirstChar, oldFirstChar);
     else