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-rw-r--r--source_edit.lua5
1 files changed, 4 insertions, 1 deletions
diff --git a/source_edit.lua b/source_edit.lua
index 34752d0..c17ce26 100644
--- a/source_edit.lua
+++ b/source_edit.lua
@@ -127,7 +127,10 @@ end
 function edit.draw(State)
   State.button_handlers = {}
   App.color(Text_color)
-  assert(#State.lines == #State.line_cache)
+  if #State.lines ~= #State.line_cache then
+    print(('line_cache is out of date; %d when it should be %d'):format(#State.line_cache, #State.lines))
+    assert(false)
+  end
   if not Text.le1(State.screen_top1, State.cursor1) then
     print(State.screen_top1.line, State.screen_top1.pos, State.screen_top1.posB, State.cursor1.line, State.cursor1.pos, State.cursor1.posB)
     assert(false)