From cca3162d13c10fc868f0cd3b690f6adf9e34e32d Mon Sep 17 00:00:00 2001
From: Tyler Goodlet <jgbt@protonmail.com>
Date: Thu, 22 Dec 2022 13:11:38 -0500
Subject: [PATCH] Add commented append slice-len sanity check

---
 piker/data/_formatters.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/piker/data/_formatters.py b/piker/data/_formatters.py
index a2339261..295851c8 100644
--- a/piker/data/_formatters.py
+++ b/piker/data/_formatters.py
@@ -329,6 +329,9 @@ class IncrementalFormatter(msgspec.Struct):
                 )
                 self.xy_nd_stop += append_len
                 profiler('appened xy history: {append_length}')
+                # sanity
+                # slice_ln = post_slice.stop - post_slice.start
+                # assert append_len == slice_ln
 
         view_changed: bool = False
         view_range: tuple[int, int] = (ivl, ivr)