Bug 7391

Git rev: master/5c1c8af083ca7b57cc339d16ce0513b27c5dac90

Steps:
Create a qemu bsp by following the wiki: https://wiki.yoctoproject.org/wiki/Transcript:_Using_the_Yocto_BSP_tools_to_create_a_qemu_BSP

I got the following errors:
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$ yocto-bsp create myqemuarm qemu
Checking basic git connectivity...
Done.

Which qemu architecture would you like to use? [default: i386]
	1) i386    (32-bit)
	2) x86_64  (64-bit)
	3) ARM     (32-bit)
	4) PowerPC (32-bit)
	5) MIPS    (32-bit)
	6) MIPS64  (64-bit)
3
Would you like to use the default (3.17) kernel? (y/n) [default: y] 
Do you need a new machine branch for this BSP (the alternative is to re-use an existing branch)? [y/n] [default: y] 
Getting branches from remote repo None...
Traceback (most recent call last):
  File "/buildarea/poky/scripts/yocto-bsp", line 150, in <module>
    ret = main()
  File "/buildarea/poky/scripts/yocto-bsp", line 145, in main
    invoke_subcommand(args, parser, yocto_bsp_help_usage, subcommands)
  File "/buildarea/poky/scripts/lib/bsp/help.py", line 73, in invoke_subcommand
    subcommands.get(args[0], subcommand_error)[0](args[1:], usage)
  File "/buildarea/poky/scripts/yocto-bsp", line 89, in yocto_bsp_create_subcommand
    yocto_bsp_create(machine, karch, scripts_path, bsp_output_dir, options.codedump, options.properties_file)
  File "/buildarea/poky/scripts/lib/bsp/engine.py", line 1617, in yocto_bsp_create
    yocto_common_create(machine, arch, scripts_path, bsp_output_dir, codedump, properties_file, properties)
SyntaxError: function specified for 'gen' property returned nothing : input type:"choicelist" name:"new_kbranch" gen:"bsp.kernel.all_branches" branches_base:"standard" prio:"20" msg:"Please choose a machine branch to base your new BSP branch on:" default:"standard/base"
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I also listed all kernels and tried each of them. here are the results:
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	1) linux-yocto-tiny_3.10  [fail]
	2) linux-yocto-tiny_3.4   [fail]
	3) linux-yocto_3.14       [success] 
	4) linux-yocto-tiny_3.17  [fail]
	5) linux-yocto-rt_3.14    [success]
	6) linux-yocto_3.10       [fail]
	7) linux-yocto-dev        [success]
	8) linux-yocto_3.17       [fail]
	9) linux-yocto-rt_3.10    [fail]
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