Issue with Solidity 6.0 (returns not work)

Question

I have strange issue with Solidity 0.6.0

When I try get result from 0.6.0 contract the same code not work, but works for 0.4.24.

Remix does not show any warnings, and I can deploy code without problem.

I deployed and verified simple contracts for test.

Solidity 0.6.0

Solidity 0.4.24

Reproduce

Try call function

getCTokenExchangeRateCurrent

With this param address

0xa253295ec2157b8b69c44b2cb35360016daa25b1

Can you show the source code of the callable contract on the address 0xA253295eC2157B8b69C44b2cb35360016DAa25b1 ? What compiler version have you used to compile that contract? — Dmytro Zarezenko
This is Compound token compound.finance/docs I didn't deploy this token — Руслан Миров
This is contract for mainnet etherscan.io/address/… The same result — Руслан Миров

Руслан Миров Руслан Миров · Accepted Answer · 2020-05-08T04:38:19

This is was my mistake.

I call function without view modifier

For Solidity 4 this works, for 6 not.