[sysid] Fix crash when all data is filtered out during analysis (wpil…

…ibsuite#7199)
rzblue · Oct 12, 2024 · 7ebd45e · 7ebd45e
1 parent 25c2e26
commit 7ebd45e
Showing 1 changed file with 5 additions and 3 deletions.
diff --git 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;
+        }
       }
     }
   }