Handling undefined build profile

[antico5]

Version of Hardhat

alpha

What happened?

• Specifying a build profile that doesn't exist, when no profiles property is present, it gets you TypeError: Cannot read properties of undefined (reading 'overrides') . Probably should tell either that the build profile doesn't exist, or there are no build profiles defined at all.
• When profiles are defined, but the specified doesnt exist, it gives the same error. In this case it should tell that the profile doesnt exist.

Minimal reproduction steps

Create a new hardhat project. Run npx hardhat compile --build-profile foo, try with and without profiles property on the hardhat config file.

Search terms

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