From 7ebd45ef4d94b05fbd60593dd087f428dd36b48d Mon Sep 17 00:00:00 2001
From: Gold856 <117957790+Gold856@users.noreply.github.com>
Date: Sat, 12 Oct 2024 00:51:56 -0400
Subject: [PATCH] [sysid] Fix crash when all data is filtered out during
 analysis (#7199)

---
 sysid/src/main/native/cpp/analysis/FilteringUtils.cpp | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/sysid/src/main/native/cpp/analysis/FilteringUtils.cpp b/sysid/src/main/native/cpp/analysis/FilteringUtils.cpp
index 43eb8e244b..b20c88e15f 100644
--- a/sysid/src/main/native/cpp/analysis/FilteringUtils.cpp
+++ b/sysid/src/main/native/cpp/analysis/FilteringUtils.cpp
@@ -326,9 +326,11 @@ static units::second_t GetMaxStepTime(
     auto& dataset = it.getValue();
 
     if (IsRaw(key) && wpi::contains(key, "dynamic")) {
-      auto duration = dataset.back().timestamp - dataset.front().timestamp;
-      if (duration > maxStepTime) {
-        maxStepTime = duration;
+      if (!dataset.empty()) {
+        auto duration = dataset.back().timestamp - dataset.front().timestamp;
+        if (duration > maxStepTime) {
+          maxStepTime = duration;
+        }
       }
     }
   }