Update

examples/misc/programs/misc/Cargo.toml

@@ -16,3 +16,4 @@ default = []
 
 [dependencies]
 anchor-lang = { path = "../../../../lang" }
+misc2 = { path = "../misc2", features = ["cpi"] }

examples/misc/programs/misc/src/lib.rs

@@ -2,6 +2,8 @@
 //! It's not too instructive/coherent by itself, so please see other examples.
 
 use anchor_lang::prelude::*;
+use misc2::misc2::MyState;
+use misc2::Auth;
 
 #[program]
 pub mod misc {
@@ -29,6 +31,15 @@ pub mod misc {
     pub fn test_executable(ctx: Context<TestExecutable>) -> ProgramResult {
         Ok(())
     }
+
+    pub fn test_state_cpi(ctx: Context<TestStateCpi>, data: u64) -> ProgramResult {
+        let cpi_program = ctx.accounts.misc2_program.clone();
+        let cpi_accounts = Auth {
+            authority: ctx.accounts.authority.clone(),
+        };
+        let ctx = ctx.accounts.cpi_state.context(cpi_program, cpi_accounts);
+        misc2::cpi::state::set_data(ctx, data)
+    }
 }
 
 #[derive(Accounts)]
@@ -47,6 +58,16 @@ pub struct TestExecutable<'info> {
     program: AccountInfo<'info>,
 }
 
+#[derive(Accounts)]
+pub struct TestStateCpi<'info> {
+    #[account(signer)]
+    authority: AccountInfo<'info>,
+    //    #[account(state = misc2_program)]
+    cpi_state: CpiState<'info, MyState>,
+    #[account(executable)]
+    misc2_program: AccountInfo<'info>,
+}
+
 #[account]
 pub struct Data {
     udata: u128,

examples/misc/programs/misc2/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "misc2"
+version = "0.1.0"
+description = "Created with Anchor"
+edition = "2018"
+
+[lib]
+crate-type = ["cdylib", "lib"]
+name = "misc2"
+
+[features]
+no-entrypoint = []
+no-idl = []
+cpi = ["no-entrypoint"]
+default = []
+
+[dependencies]
+anchor-lang = { path = "../../../../lang" }

examples/misc/programs/misc2/Xargo.toml

@@ -0,0 +1,2 @@
+[target.bpfel-unknown-unknown.dependencies.std]
+features = []