boostd start-up panic when IndexProvider.Enable == false

[f8-ptrk]

Checklist

• This is not a question or a support request. If you have any boost related questions, please ask in the discussion forum.
• This is not a new feature request. If it is, please file a feature request instead.
• This is not an enhancement request. If it is, please file a improvement suggestion instead.
• I have searched on the issue tracker and the discussion forum, and there is no existing related issue or discussion.
• I am running the Latest release, or the most recent RC(release canadiate) for the upcoming release or the dev branch(master), or have an issue updating to any of these.
• I did not make any code changes to boost.

Boost component

• boost daemon - storage providers
• boost client
• boost UI
• boost data-transfer
• boost index-provider
• Other

Boost Version

boostd version 1.7.3+git.188d5f0

Describe the Bug

with IndexProvider.Enable == false boostd fails to start and panics

Logging Information

Contract deals monitor is currently disabled. Update config.toml if you want to enable it.
panic: interface conversion: provider.Interface is *indexprovider.DisabledIndexProvider, not *engine.Engine

goroutine 1 [running]:
github.com/filecoin-project/boost/node/modules.SetLinkSystem(0x0?, {0x67dfb20?, 0x8f45a00?})
	/opt//build/boost/node/modules/graphsync.go:72 +0x6b
reflect.Value.call({0x4e9ac20?, 0x648c870?, 0x67fdd90?}, {0x547781f, 0x4}, {0xc00dca8c90, 0x2, 0x0?})
	/opt//build-tools/go/src/reflect/value.go:586 +0xb0b
reflect.Value.Call({0x4e9ac20?, 0x648c870?, 0x2?}, {0xc00dca8c90?, 0xc0012e0110?, 0xc00dca8c90?})
	/opt//build-tools/go/src/reflect/value.go:370 +0xbc
go.uber.org/dig.defaultInvoker({0x4e9ac20?, 0x648c870?, 0xc0012e0100?}, {0xc00dca8c90?, 0x2?, 0x67f2fc0?})
	/opt//build-tools/.go/pkg/mod/go.uber.org/[email protected]/container.go:220 +0x28
go.uber.org/dig.(*Scope).Invoke(0xc000c606e0, {0x4e9ac20?, 0x648c870}, {0x4e9ac20?, 0xc001ce9088?, 0x648c870?})
	/opt//build-tools/.go/pkg/mod/go.uber.org/[email protected]/invoke.go:92 +0x374
go.uber.org/dig.(*Container).Invoke(0xc001ce90b0?, {0x4e9ac20?, 0x648c870?}, {0x0?, 0x53dee80?, 0xc001e380d0?})
	/opt//build-tools/.go/pkg/mod/go.uber.org/[email protected]/invoke.go:46 +0x2b
go.uber.org/fx.runInvoke({0x7f523c2c1098?, 0xc000636ce0?}, {{0x4e9ac20, 0x648c870}, {0xc000646f00, 0x7, 0x8}})
	/opt//build-tools/.go/pkg/mod/go.uber.org/[email protected]/invoke.go:108 +0x1ff
go.uber.org/fx.(*module).executeInvoke(0xc000c6a2d0, {{0x4e9ac20, 0x648c870}, {0xc000646f00, 0x7, 0x8}})
	/opt//build-tools/.go/pkg/mod/go.uber.org/[email protected]/module.go:186 +0x146
go.uber.org/fx.(*module).executeInvokes(0xc000c6a2d0)
	/opt//build-tools/.go/pkg/mod/go.uber.org/[email protected]/module.go:172 +0xea
go.uber.org/fx.New({0xc00151f578, 0x3, 0x25?})
	/opt//build-tools/.go/pkg/mod/go.uber.org/[email protected]/app.go:530 +0x851
github.com/filecoin-project/boost/node.New({0x67d0a40, 0xc0002820f0}, {0xc0010f8c60, 0x6, 0x6})
	/opt//build/boost/node/builder.go:396 +0x526
main.glob..func40(0x8b99400?)
	/opt//build/boost/cmd/boostd/run.go:98 +0x7bf
github.com/urfave/cli/v2.(*Command).Run(0x8b99400, 0xc000eed3c0, {0xc000499cd0, 0x1, 0x1})
	/opt//build-tools/.go/pkg/mod/github.com/urfave/cli/[email protected]/command.go:273 +0x9eb
github.com/urfave/cli/v2.(*Command).Run(0xc0002b6420, 0xc000eed1c0, {0xc000226000, 0x4, 0x4})
	/opt//build-tools/.go/pkg/mod/github.com/urfave/cli/[email protected]/command.go:266 +0xc4d
github.com/urfave/cli/v2.(*App).RunContext(0xc000054f00, {0x67d0a78?, 0xc000220c80}, {0xc000226000, 0x4, 0x4})
	/opt//build-tools/.go/pkg/mod/github.com/urfave/cli/[email protected]/app.go:332 +0x616
github.com/urfave/cli/v2.(*App).Run(...)
	/opt//build-tools/.go/pkg/mod/github.com/urfave/cli/[email protected]/app.go:309
main.main()
	/opt//build/boost/cmd/boostd/main.go:58 +0x51

### Repo Steps

set IndexProvider.Enable == false, run boostd, fail

[f8-ptrk]

@LexLuthr