eta              = "master:9d9bca8785911e8ae06d507bbfb99d6a811f072e"
meta-initramfs    = "master:2397f51915252c00c4b86dc324feec76f61dcf22"
meta-handheld     = "master:b180f6be6064794d579b48e82bf8be8a91f4d7de"

NOTE: Preparing runqueue
NOTE: Executing SetScene Tasks
NOTE: Executing RunQueue Tasks
NOTE: validating kernel config, see log.do_kernel_configcheck for details
ERROR: Error executing a python function in /oe/oe-core/meta/recipes-core/images/core-image-base.bb:

The stack trace of python calls that resulted in this exception/failure was:
File: 'do_rootfs', lineno: 17, function: <module>
     0013:    # generate final images
     0014:    create_image(d)
     0015:
     0016:
 *** 0017:do_rootfs(d)
     0018:
File: 'do_rootfs', lineno: 14, function: do_rootfs
     0010:    # generate rootfs
     0011:    create_rootfs(d)
     0012:
     0013:    # generate final images
 *** 0014:    create_image(d)
     0015:
     0016:
     0017:do_rootfs(d)
     0018:
File: '/oe/oe-core/meta/lib/oe/image.py', lineno: 228, function: create_image
     0224:        execute_pre_post_process(self.d, post_process_cmds)
     0225:
     0226:
     0227:def create_image(d):
 *** 0228:    Image(d).create()
     0229:
     0230:if __name__ == "__main__":
     0231:    """
     0232:    Image creation can be called independent from bitbake environment.
File: '/oe/oe-core/meta/lib/oe/image.py', lineno: 207, function: create
     0203:        execute_pre_post_process(self.d, pre_process_cmds)
     0204:
     0205:        self._remove_old_symlinks()
     0206:
 *** 0207:        image_cmds = self._get_imagecmds()
     0208:
     0209:        # create the images in parallel
     0210:        nproc = multiprocessing.cpu_count()
     0211:        pool = bb.utils.multiprocessingpool(nproc)
File: '/oe/oe-core/meta/lib/oe/image.py', lineno: 180, function: _get_imagecmds
     0176:            bb.data.update_data(localdata)
     0177:            localdata.setVar('type', type)
     0178:
     0179:            cmds.append(localdata.expand("\tcd ${DEPLOY_DIR_IMAGE}"))
 *** 0180:            cmds.append("\t" + localdata.getVar("IMAGE_CMD", True))
     0181:
     0182:            if type in cimages:
     0183:                for ctype in cimages[type]:
     0184:                    cmds.append("\t" + localdata.getVar("COMPRESS_CMD_" + ctype, True))
Exception: TypeError: cannot concatenate 'str' and 'NoneType' objects

ERROR: Function failed: do_rootfs
ERROR: Logfile of failure stored in: /oe/oe-core/build/tmp-eglibc/work/collie-oe-linux-gnueabi/core-image-base/1.0-r0/temp/log.do_rootfs.20720
ERROR: Task 7 (/oe/oe-core/meta/recipes-core/images/core-image-base.bb, do_rootfs) failed with exit code '1'
NOTE: Tasks Summary: Attempted 2429 tasks of which 692 didn't need to be rerun and 1 failed.
No currently running tasks (2429 of 2432)

Summary: 1 task failed:
  /oe/oe-core/meta/recipes-core/images/core-image-base.bb, do_rootfs
Summary: There were 2 ERROR messages shown, returning a non-zero exit code.
andrea@mizar /oe/oe-core/build $ bitbake -c cleansstate core-image-base
NOTE: Started PRServer with DBfile: /oe/oe-core/build/cache/prserv.sqlite3, IP: