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Ethereum: Unknown selector error (0x98296c54) in BIGTOkenTest.t.sol
An unexpected error was encountered in the latest version of the popular smart contract testing framework, testbobBalance
. The specific issue is the “Unknown selector” error that is triggered when running a test using the BIGTTokenTest
contract.
Issue: Unknown selector error (0x98296c54)
This unknown selector error occurs when trying to access the VmCalls
function in the testbobBalance
test. The error message “Unknown selector 0x98296c54 for VmCalls” indicates that there is a problem with the way the contract function is being called.
Source code: BIGTokenTest.t.sol
After analyzing the code, it turns out that the testbobBalance
function in the BIGTTokenTest
contract contains a logical error. More precisely, the test tries to call the VmCalls
function with an argument that is not defined in the current scope.
Problematic line of code
function testbobBalance() public { { function testbobBalance() ;
// ... (other code)
VmCalls ( vb , 0x0 ... }
In this line of code, VmCalls
is called with an argument of 0x0 ... Here is an updated version of the code snippet with the corrected line:
function testbobBalance() public { { function testbobBalance() ;
// ... (other code)
VmCalls ( vb , 0x0 ... }
By adding a second argument 0x0 …
Note: The above article is based on hypothetical information and may not reflect real-world scenarios or actual Ethereum development practices. Before making any changes to the production code, it is essential to verify any bugs or issues in a live test environment.