Sometimes "Unhandled promise rejection" with error I expected to revert, but usually passes correctly

[aac1122]

Version of Hardhat

3.0.7

What happened?

Not critically, I just need to run it several times and it works OK, but I write ".to.be.revertedWith("Address already allowed");" in this test, so usually it goes all right.

user:~/Projects/[ProjectName]/apps/contracts$ npx hardhat test
...

      1) Test that an address may be added to an allowedAddresses of a [Struct] only once

Unhandled promise rejection:

Error: VM Exception while processing transaction: reverted with reason string 'Address already allowed'
at [ContractName].[FunctionName] (contracts/[FileName].sol:266)
at [ContractName].[FunctionName] (contracts/[FileName].sol:278)
at EdrProvider.#handleEdrResponse (/home/user/Projects/[ProjectName]/apps/contracts/node_modules/hardhat/src/internal/builtin-plugins/network-manager/edr/edr-provider.ts:338:17)
at EdrProvider.#handleRequest (/home/user/Projects/[ProjectName]/apps/contracts/node_modules/hardhat/src/internal/builtin-plugins/network-manager/edr/edr-provider.ts:408:35)
at async next (/home/user/Projects/[ProjectName]/apps/contracts/node_modules/hardhat/src/internal/core/hook-manager.ts:121:13)
at async next (/home/user/Projects/[ProjectName]/apps/contracts/node_modules/hardhat/src/internal/core/hook-manager.ts:120:13)
at async EdrProvider.request (/home/user/Projects/[ProjectName]/apps/contracts/node_modules/hardhat/src/internal/builtin-plugins/network-manager/edr/edr-provider.ts:252:25)
at async HardhatEthersSigner.sendTransaction (/home/user/Projects/[ProjectName]/apps/contracts/node_modules/@nomicfoundation/hardhat-ethers/src/internal/signers/signers.ts:183:18)
at async send (/home/user/Projects/[ProjectName]/apps/contracts/node_modules/ethers/src.ts/contract/contract.ts:313:20)
at async Proxy.[MyProjectFunctionName] (/home/user/Projects/CashVote/NemizoriCashVote/apps/contracts/node_modules/ethers/src.ts/contract/contract.ts:352:16)

Minimal reproduction steps

I don't know, I didn't mention it with other tests yet.

Search terms

No response

[aac1122]

I am sorry, I didn't add "await" to the previous function. But I expect this is still a bug.

[michalbrabec]

@aac1122 can you share the test and tested contract or at least a bit of it so we can form a better idea what code is causing the issue?
We are adding a better handling of test rejections, but it applies to Mocha so I'm not sure if would help you. There is ethers in the stack trace so it might provide more details #7493 .