ExtensionContent.jsm, line 489: TypeError: Argument 1 of PrecompiledScript.executeInGlobal is not an object.

(TB 8.5.a1 debian buster 32bit)

upstream: https://bugzilla.mozilla.org/show_bug.cgi?id=1403505

JavaScript error: re[/gre/modules/ExtensionContent.jsm,](/gre/modules/ExtensionContent.jsm,) line 489: TypeError: Argument 1 of PrecompiledScript.executeInGlobal is not an object.

= code

  /**
   * Tries to inject this script into the given window and sandbox, if
   * there are pending operations for the window's current load state.
   *
   * @param {BaseContext} context
   *        The content script context into which to inject the scripts.
   * @returns {Promise<any>}
   *        Resolves to the last value in the evaluated script, when
   *        execution is complete.
   */

...

    // The evaluations below may throw, in which case the promise will be
    // automatically rejected.
    TelemetryStopwatch.start(CONTENT_SCRIPT_INJECTION_HISTOGRAM, context);
    try {
      for (let script of scripts) {
        result = script.executeInGlobal(context.cloneScope);
      }

      if (this.matcher.jsCode) {
        result = Cu.evalInSandbox(this.matcher.jsCode, context.cloneScope, "latest");
      }
    } finally {
      TelemetryStopwatch.finish(CONTENT_SCRIPT_INJECTION_HISTOGRAM, context);
    }