Fails To Compile On Nightly Because of `clear_on_drop` not being updated to 0.2.4

[AtropineTears]

I have four dependencies that I am using and do not know which dependency this is for, but it looks to be either merlin or curve25519-dalek.

One dependency in there is using clear_on_drop (0.2.3) which with nightly, leads to compilation errors. I sent in a pull request yesterday to fix the compilation errors and it has been updated but I cannot find which dependency depends on clear_on_drop.

Using the latest versions of all the main four dependencies leads to compilation errors.

List of dependecies i'm using:

• rand (0.7.3)
• curve25519-dalek (2.1.0)
• merlin (2.0.0)
• bulletproofs (2.0.0)

[AtropineTears]

Forgot to run cargo update. Everything works.