Index: source/texk/web2c/luatexdir/font/texfont.w
===================================================================
--- source/texk/web2c/luatexdir/font/texfont.w	(révision 4639)
+++ source/texk/web2c/luatexdir/font/texfont.w	(copie de travail)
@@ -1564,7 +1564,7 @@
     dump_things(*param_base(f), (font_params(f) + 1));
 
     if (font_math_params(f) > 0) {
-        dump_things(*math_param_base(f), (font_math_params(f)));
+        dump_things(*math_param_base(f), (font_math_params(f) + 1));
     }
     if (has_left_boundary(f)) {
         dump_int(1);