From 31403f4a5c103a8f78ee1893404abbcf7e6d8cde Mon Sep 17 00:00:00 2001
From: Adeeb Shihadeh <adeebshihadeh@gmail.com>
Date: Wed, 15 Apr 2026 10:50:24 -0700
Subject: [PATCH] jotplugger: render segment range slices properly (#37837)

---
 tools/jotpluggler/app.h      | 5 ++++-
 tools/jotpluggler/session.cc | 2 +-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/tools/jotpluggler/app.h b/tools/jotpluggler/app.h
index 55f6d3ef9..872a6973d 100644
--- a/tools/jotpluggler/app.h
+++ b/tools/jotpluggler/app.h
@@ -276,7 +276,10 @@ struct RouteIdentifier {
   std::string display_slice() const {
     const int begin = slice_explicit ? slice_begin : available_begin;
     const int end = slice_explicit ? slice_end : available_end;
-    if (end < 0 || end == begin) {
+    if (end < 0) {
+      return std::to_string(begin) + ":";
+    }
+    if (end == begin) {
       return std::to_string(begin);
     }
     return std::to_string(begin) + ":" + std::to_string(end);
diff --git a/tools/jotpluggler/session.cc b/tools/jotpluggler/session.cc
index 22dd7dd46..173df7bc0 100644
--- a/tools/jotpluggler/session.cc
+++ b/tools/jotpluggler/session.cc
@@ -355,7 +355,7 @@ bool apply_route_slice_change(AppSession *session, UiState *state, std::string_v
   int begin = 0;
   int end = 0;
   if (!parse_slice_spec(slice_text, &begin, &end)) {
-    state->error_text = "Slice must be N or N:M.";
+    state->error_text = "Slice must be N, N:, or N:M.";
     state->open_error_popup = true;
     return false;
   }