It seems that it's simply impossible to run too many things in parallel over ADB on a single device. Really weird stuff happening, like completely unrelated shell calls using files created by other shell calls. Switch back to serial implementation.

lib/roles/device/support/adb.js

@@ -5,7 +5,7 @@ var adbkit = require('adbkit')
 var logger = require('../../../util/logger')
 var promiseutil = require('../../../util/promiseutil')
 
-module.exports = syrup()
+module.exports = syrup.serial()
   .define(function(options) {
     var log = logger.createLogger('device:support:adb')
     var adb = adbkit.createClient()

lib/roles/device/support/channels.js

@@ -3,7 +3,7 @@ var syrup = require('syrup')
 var logger = require('../../../util/logger')
 var ChannelManager = require('../../../wire/channelmanager')
 
-module.exports = syrup()
+module.exports = syrup.serial()
   .define(function(options, router) {
     var log = logger.createLogger('device:support:channels')
     var channels = new ChannelManager()

lib/roles/device/support/properties.js

@@ -3,7 +3,7 @@ var syrup = require('syrup')
 var devutil = require('../../../util/devutil')
 var logger = require('../../../util/logger')
 
-module.exports = syrup()
+module.exports = syrup.serial()
   .dependency(require('./adb'))
   .define(function(options, adb) {
     var log = logger.createLogger('device:support:properties')

lib/roles/device/support/push.js

@@ -4,7 +4,7 @@ var zmq = require('zmq')
 
 var logger = require('../../../util/logger')
 
-module.exports = syrup()
+module.exports = syrup.serial()
   .define(function(options) {
     var log = logger.createLogger('device:support:push')
 

lib/roles/device/support/quit.js

@@ -3,7 +3,7 @@ var syrup = require('syrup')
 
 var logger = require('../../../util/logger')
 
-module.exports = syrup()
+module.exports = syrup.serial()
   .define(function(options) {
     var log = logger.createLogger('device:support:quit')
     var cleanup = []

lib/roles/device/support/router.js

@@ -3,7 +3,7 @@ var syrup = require('syrup')
 var logger = require('../../../util/logger')
 var wirerouter = require('../../../wire/router')
 
-module.exports = syrup()
+module.exports = syrup.serial()
   .dependency(require('./sub'))
   .dependency(require('./channels'))
   .define(function(options, sub, channels) {

lib/roles/device/support/sub.js

@@ -5,7 +5,7 @@ var zmq = require('zmq')
 var logger = require('../../../util/logger')
 var wireutil = require('../../../wire/util')
 
-module.exports = syrup()
+module.exports = syrup.serial()
   .dependency(require('./channels'))
   .define(function(options, channels) {
     var log = logger.createLogger('device:support:sub')