message: bind instances
diff: +/**
  + * tracing: off
  + */
  +
  // option
  // cause
  import * as Cause from "../Cause/core"
  @@ -83,6 +87,12 @@ export class CustomRuntime<R> {
  this.ancestorStackTraceLength = this.ancestorStackTraceLength.bind(this)
  this.ancestryLength = this.ancestryLength.bind(this)
  this.fiberContext = this.fiberContext.bind(this)
  + this.run = this.run.bind(this)
  + this.runAsap = this.runAsap.bind(this)
  + this.runCancel = this.runCancel.bind(this)
  + this.runMain = this.runMain.bind(this)
  + this.runPromise = this.runPromise.bind(this)
  + this.runPromiseExit = this.runPromiseExit.bind(this)
  }
  fiberContext<E, A>(reporter: FailureReporter = constVoid) {
  