0.9 OsRng does not seem to implement CryptoRng ?

[pinkforest]

Common issues

Problem: CryptoRng is not implemented for OsRng

• https://docs.rs/rand_core/latest/rand_core/struct.OsRng.html#impl-TryCryptoRng-for-OsRng vs
• https://docs.rs/rand_core/0.6.4/rand_core/struct.OsRng.html#impl-CryptoRng-for-OsRng

Quick solution: `?

Details: It seems it only implements the fallible version now? Is this intentional?

I assume that this is may be intentional given OsRng may fail? Tried to find the discussion.

Notes

• Minor: It seems ChangeLog didn't mention CryptoRngCore has been removed (Rework CryptoRng #1273)

[dhardy]

CryptoRng now requires RngCore (thus replacing CryptoRngCore) which OsRng no longer implements. OsRng does implement TryCryptoRng.

Yes, getrandom can technically fail, though this isn't usually observed.

If you wish a panic-on-error version of OsRng, you may use OsRng.unwrap_err(). The result (UnwrapErr<OsRng>) should implement CryptoRng.

Noted, we should update the CHANGELOG for rand_core.