fix previousOpcode ref test

2 years ago · ba747da577
parent bfa212eb90
commit ba747da577
1 changed files with 1 additions and 1 deletions
--- a/libs/remix-simulator/src/VmProxy.ts
+++ b/libs/remix-simulator/src/VmProxy.ts
@ -250,7 +250,7 @@ export class VmProxy {
        depth: depth
      }

-      if (previousOpcode.op === 'CALLDATACOPY' || previousOpcode.op === 'CODECOPY' || previousOpcode.op === 'EXTCODECOPY' || previousOpcode.op === 'RETURNDATACOPY' || previousOpcode.op === 'MSTORE' || previousOpcode.op === 'MSTORE8') {
+      if (previousOpcode && (previousOpcode.op === 'CALLDATACOPY' || previousOpcode.op === 'CODECOPY' || previousOpcode.op === 'EXTCODECOPY' || previousOpcode.op === 'RETURNDATACOPY' || previousOpcode.op === 'MSTORE' || previousOpcode.op === 'MSTORE8')) {
        step.memory = data.memory
        this.lastMemoryUpdate = step.memory
      }