🔧 fix: panic on unwrapping last emitted event

🔧 fix: panic on unwrapping last emitted event

Author: Jon-Becker

common/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "heimdall-common"
-version = "0.2.1"
+version = "0.2.2"
 edition = "2021"
 license = "MIT"
 readme = "README.md"

config/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "heimdall-config"
-version = "0.2.1"
+version = "0.2.2"
 edition = "2021"
 license = "MIT"
 readme = "README.md"

heimdall/Cargo.toml

@@ -5,7 +5,7 @@ keywords = ["ethereum", "web3", "decompiler", "evm", "crypto"]
 license = "MIT"
 name = "heimdall"
 readme = "README.md"
-version = "0.2.1"
+version = "0.2.2"
 
 [dependencies]
 backtrace = "0.3"

heimdall/src/decompile/analyze.rs

@@ -114,7 +114,13 @@ impl VMTrace {
             if opcode_number >= 0xA0 && opcode_number <= 0xA4 {
 
                 // LOG0, LOG1, LOG2, LOG3, LOG4
-                let logged_event = operation.events.last().unwrap().to_owned();
+                let logged_event = match operation.events.last() {
+                    Some(event) => event,
+                    None => {
+                        function.notices.push(format!("unable to decode event emission at instruction {}", instruction.instruction));
+                        continue;
+                    }
+                };
 
                 // check to see if the event is a duplicate
                 if !function.events.iter().any(|(selector, _)| {