venom bug: AssertionError: Cannot dup non-existent operand #4215
Description
Compile timelock_controller_mock.vy with commit f2975d7:
~$ vyper timelock_controller_mock.vy --experimental-codegen --optimize "none" --evm-version "shanghai"
Error compiling: timelock_controller_mock.vy
AssertionError: Cannot dup non-existent operandIt doesn't happen if you use cancun as EVM version.