Error using create2 and solc optimizer off

[ghost]

Stack

• hardhat
• waffle
• solidity-coverage

I am looking for a clue on where to look at, my tests are working using tests, when I use coverage I am having some issues.
Can some code that has some issues but the optimizer fixes ?

I have narrow down the issue and it looks like the create2 function isn't behaving the say way.

[cgewecke]

Can some code that has some issues but the optimizer fixes ?

So far, there are two known cases where people have discovered code which only compiles with the optimizer on.

• examples of the first are documented in Why force turning off solc optimizer in 0.7.0 beta? #417 and relate to contract deployments happening in the constructor of a parent contract. The best description is here.
• the second is being investigated at solidity 10354 and relates to using structs/ABIEncoderV2 triggering a stack too deep assembler error.

I have narrow down the issue and it looks like the create2 function isn't behaving the say way.

Oh! Could you provide some more details to help reproduce the problem?

• what is the test failure like?
• what is your compiler version and settings?
• what is the create2 code sequence like?

[EDIT - I've retitled this issue to reflect the reported problem]

[ghost]

I just found the cause of the issue.
I was using standard gas estimate when sending the transaction when switching to coverage I guess the contract I try to deploy using gets too big and create2 just returns address(0x0).

I have fixed the issue overriding the gas estimate.

[cgewecke]

Oh great! That's good to hear.

The extra gas needed is often really confusing, sorry about that.