Same issue happening for me on a brand new MacBook Pro (Retina, 15-inch, Mid 2015). This happens extremely frequently. Insanely frustrating having to constantly shut down my computer, knowing that putting it to sleep for any length of time will result in this crash.
PLEASE fix this, Apple.
cps: 3
Code: 00000000 13006c00
Stackshot reason: Watchdog
Model: MacBookPro11,5, BootROM MBP114.0172.B04, 4 processors, Intel Core i7, 2.8 GHz, 16 GB, SMC 2.30f2
Graphics: AMD Radeon R9 M370X, AMD Radeon R9 M370X, PCIe, 2048 MB
Graphics: Intel Iris Pro, Intel Iris Pro, Built-In
Memory Module: BANK 0/DIMM0, 8 GB, DDR3, 1600 MHz, 0x80AD, 0x484D54343147533642465238412D50422020
Memory Module: BANK 1/DIMM0, 8 GB, DDR3, 1600 MHz, 0x80AD, 0x484D54343147533642465238412D50422020
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x152), Broadcom BCM43xx 1.0 (7.15.166.24.3)
Bluetooth: Version 4.3.5f8 15969, 3 services, 27 devices, 1 incoming serial ports
Network Service: Thunderbolt Ethernet, Ethernet, en4
Network Service: Wi-Fi, AirPort, en0
PCI Card: Apple 57762-A0, Ethernet Controller, Thunderbolt@195,0,0
Serial ATA Device: APPLE SSD SM1024G, 1 TB
USB Device: Internal Memory Card Reader
USB Device: Hub
USB Device: USB Receiver
USB Device: Apple Internal Keyboard / Trackpad
USB Device: Bluetooth USB Host Controller
Thunderbolt Bus: MacBook Pro, Apple Inc., 27.1
Thunderbolt Device: Thunderbolt to Gigabit Ethernet Adapter, Apple Inc., 3, 5.5