bitbake returns OperationError on data_smart.py

Env :

Window Subsystem Linux , Ubuntu 18.04 LTS

Command : 

source meta-agl/scripts/aglsetup.sh -m raspberrypi3 agl-demo agl-netboot agl-appfw-smack

bitbake agl-demo-platform

Error log :

ERROR: ExpansionError during parsing /root/workspace_agl/meta-agl/meta-agl-profile-core/recipes-apis/agl-service-mediascanner/agl-service-mediascanner_git.bb | ETA: 0:03:07
Traceback (most recent call last):
File "/root/workspace_agl/external/poky/bitbake/lib/bb/data_smart.py", line 808, in DataSmart.getVarFlag(var='PV', flag='_content', expand=True, noweakdefault=False, parsing=False, retparser=False):
if expand or retparser:
> parser = self.expandWithRefs(value, cachename)
if expand:
File "/root/workspace_agl/external/poky/bitbake/lib/bb/data_smart.py", line 416, in DataSmart.expandWithRefs(s='1.0+git${SRCPV}', varname='PV'):
try:
> s = _expand_var_regexp_.sub(varparse.var_sub, s)
try:
File "/root/workspace_agl/external/poky/bitbake/lib/bb/data_smart.py", line 108, in VariableParse.var_sub(match=<_sre.SRE_Match object; span=(7, 15), match='${SRCPV}'>):
raise Exception("variable %s references itself!" % self.varname)
> var = self.d.getVarFlag(key, "_content")
self.references.add(key)
File "/root/workspace_agl/external/poky/bitbake/lib/bb/data_smart.py", line 808, in DataSmart.getVarFlag(var='SRCPV', flag='_content', expand=True, noweakdefault=False, parsing=False, retparser=False):
if expand or retparser:
> parser = self.expandWithRefs(value, cachename)
if expand:
File "/root/workspace_agl/external/poky/bitbake/lib/bb/data_smart.py", line 430, in DataSmart.expandWithRefs(s='${@bb.fetch2.get_srcrev(d)}', varname='SRCPV'):
except Exception as exc:
> raise ExpansionError(varname, s, exc) from exc

bb.data_smart.ExpansionError: Failure expanding variable SRCPV, expression was ${@bb.fetch2.get_srcrev(d)} which triggered exception OperationalError: disk I/O error

Summary: There was 1 ERROR message shown, returning a non-zero exit code.