This x86 appveyor build failed two unittests: https://ci.appveyor.com/project/torproject/tor/builds/22350196/job/457arqlgfgf6b0a3 ``` circuitpadding/circuitpadding_tokens: [forking] FAIL ../src/test/test_circuitpadding.c:1125: assert(mi->histogram[4] OP_EQ 2): 0 vs 2 [circuitpadding_tokens FAILED] circuitpadding/circuitpadding_rtt: [forking] FAIL ../src/test/test_circuitpadding.c:324: assert(relay_side->padding_info[0]->last_received_time_usec OP_NE 0): 0 vs 0 [circuitpadding_rtt FAILED] ```