Added supression for helgrind false alarm.

tests/helgrind.suppr

@@ -467,4 +467,21 @@
    fun:_ZNSt6threadC1IZNSt13__future_base17_Async_state_implISt12_Bind_simpleIFZN3cta11objectstore10BackendVFS12AsyncUpdaterC1ERS6_RKSsRSt8functionIFSsSA_EEEUlvE_vEEvEC1EOSH_EUlvE_IEEEOT_DpOT0_
    fun:_ZNSt13__future_base17_Async_state_implISt12_Bind_simpleIFZN3cta11objectstore10BackendVFS12AsyncUpdaterC1ERS4_RKSsRSt8functionIFSsS8_EEEUlvE_vEEvEC1EOSF_
    fun:_ZN9__gnu_cxx13new_allocatorINSt13__future_base17_Async_state_implISt12_Bind_simpleIFZN3cta11objectstore10BackendVFS12AsyncUpdaterC1ERS6_RKSsRSt8functionIFSsSA_EEEUlvE_vEEvEEE9constructISI_ISH_EEEvPT_DpOT0_
+}
+
+{
+   AsyncGccRace
+   Helgrind:Race
+   fun:_ZNSt6thread5_ImplISt12_Bind_simpleIFZNSt13__future_base17_Async_state_implIS1_IFSt8functionIFvvEEvEEvEC1EOS8_EUlvE_vEEED1Ev
+   fun:_ZN9__gnu_cxx13new_allocatorINSt6thread5_ImplISt12_Bind_simpleIFZNSt13__future_base17_Async_state_implIS3_IFSt8functionIFvvEEvEEvEC1EOSA_EUlvE_vEEEEE7destroyISG_EEvPT_
+   fun:_ZNSt16allocator_traitsISaINSt6thread5_ImplISt12_Bind_simpleIFZNSt13__future_base17_Async_state_implIS2_IFSt8functionIFvvEEvEEvEC1EOS9_EUlvE_vEEEEEE10_S_destroyISF_EENSt9enable_ifIXsrNSH_16__destroy_helperIT_EE5valueEvE4typeERSG_PSL_
+   fun:_ZNSt16allocator_traitsISaINSt6thread5_ImplISt12_Bind_simpleIFZNSt13__future_base17_Async_state_implIS2_IFSt8functionIFvvEEvEEvEC1EOS9_EUlvE_vEEEEEE7destroyISF_EEvRSG_PT_
+   fun:_ZNSt23_Sp_counted_ptr_inplaceINSt6thread5_ImplISt12_Bind_simpleIFZNSt13__future_base17_Async_state_implIS2_IFSt8functionIFvvEEvEEvEC1EOS9_EUlvE_vEEEESaISF_ELN9__gnu_cxx12_Lock_policyE2EE10_M_disposeEv
+   fun:_ZNSt16_Sp_counted_baseILN9__gnu_cxx12_Lock_policyE2EE10_M_releaseEv
+   fun:_ZNSt14__shared_countILN9__gnu_cxx12_Lock_policyE2EED1Ev
+   fun:_ZNSt12__shared_ptrINSt6thread10_Impl_baseELN9__gnu_cxx12_Lock_policyE2EED1Ev
+   fun:_ZNSt10shared_ptrINSt6thread10_Impl_baseEED1Ev
+   fun:_ZNSt6threadC1IZNSt13__future_base17_Async_state_implISt12_Bind_simpleIFSt8functionIFvvEEvEEvEC1EOS8_EUlvE_IEEEOT_DpOT0_
+   fun:_ZNSt13__future_base17_Async_state_implISt12_Bind_simpleIFSt8functionIFvvEEvEEvEC1EOS6_
+   fun:_ZN9__gnu_cxx13new_allocatorINSt13__future_base17_Async_state_implISt12_Bind_simpleIFSt8functionIFvvEEvEEvEEE9constructIS9_IS8_EEEvPT_DpOT0_
 }
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