From 2f3df8cce0711ad33ecf1b5c9fe056c2f85a0f06 Mon Sep 17 00:00:00 2001
From: Sebastian Bor <Sebastian_Bor@hotmail.com>
Date: Thu, 22 Jul 2021 16:28:04 +0100
Subject: [PATCH] Explorer: Show simulation error for Upgrade instruction with
 none existing buffer (#18838)

---
 explorer/src/pages/inspector/SimulatorCard.tsx | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/explorer/src/pages/inspector/SimulatorCard.tsx b/explorer/src/pages/inspector/SimulatorCard.tsx
index c55194dad3..62b8341d62 100644
--- a/explorer/src/pages/inspector/SimulatorCard.tsx
+++ b/explorer/src/pages/inspector/SimulatorCard.tsx
@@ -247,6 +247,15 @@ function useSimulator(message: Message) {
           }
         });
 
+        // If the instruction's simulation returned an error without any logs then add an empty log entry for Runtime error
+        // For example BpfUpgradableLoader fails without returning any logs for Upgrade instruction with buffer that doesn't exist
+        if (instructionError && instructionLogs.length === 0) {
+          instructionLogs.push({
+            logs: [],
+            failed: true,
+          });
+        }
+
         if (
           instructionError &&
           instructionError.index === instructionLogs.length - 1