fix(simulation): fix the problem of validator set is empty after InitGenesis in simulation test (backport #18196) (#20897)

Co-authored-by: Chenqun Lu <luchenqun@qq.com>
Co-authored-by: Julien Robert <julien@rbrt.fr>

Author: 3 people

CHANGELOG.md

@@ -48,6 +48,10 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * [#20631](https://github.com/cosmos/cosmos-sdk/pull/20631) Fix json parsing in the wait-tx command.
 * (x/auth) [#20438](https://github.com/cosmos/cosmos-sdk/pull/20438) Add `--skip-signature-verification` flag to multisign command to allow nested multisigs.
 
+## Bug Fixes
+
+* (simulation) [#18196](https://github.com/cosmos/cosmos-sdk/pull/18196) Fix the problem of `validator set is empty after InitGenesis` in simulation test.
+
 ## [v0.50.7](https://github.com/cosmos/cosmos-sdk/releases/tag/v0.50.7) - 2024-06-04
 
 ### Improvements

testutil/sims/state_helpers.go

@@ -205,11 +205,11 @@ func AppStateRandomizedFn(
 	)
 	appParams.GetOrGenerate(
 		StakePerAccount, &initialStake, r,
-		func(r *rand.Rand) { initialStake = math.NewInt(r.Int63n(1e12)) },
+		func(r *rand.Rand) { initialStake = sdk.DefaultPowerReduction.AddRaw(r.Int63n(1e12)) },
 	)
 	appParams.GetOrGenerate(
 		InitiallyBondedValidators, &numInitiallyBonded, r,
-		func(r *rand.Rand) { numInitiallyBonded = int64(r.Intn(300)) },
+		func(r *rand.Rand) { numInitiallyBonded = int64(r.Intn(299) + 1) },
 	)
 
 	if numInitiallyBonded > numAccs {