hs_service.c:403: service_intro_point_new: Non-fatal assertion !(!ls) failed. (on Tor 0.3.2.1-alpha 290274db)

Oct 02 21:27:57.000 [warn] tor_bug_occurred_(): Bug: src/or/hs_service.c:403: service_intro_point_new: Non-fatal assertion !(!ls) failed. (on Tor 0.3.2.1-alpha 290274dbb5428bc5)
Oct 02 21:27:57.000 [warn] Bug: Non-fatal assertion !(!ls) failed in service_intro_point_new at src/or/hs_service.c:403. Stack trace: (on Tor 0.3.2.1-alpha 290274dbb5428bc5)
Oct 02 21:27:57.000 [warn] Bug:     ./tor(log_backtrace+0x42) [0x55d97eb5dd52] (on Tor 0.3.2.1-alpha 290274dbb5428bc5)
Oct 02 21:27:57.000 [warn] Bug:     ./tor(tor_bug_occurred_+0xb7) [0x55d97eb78ba7] (on Tor 0.3.2.1-alpha 290274dbb5428bc5)
Oct 02 21:27:57.000 [warn] Bug:     ./tor(hs_service_run_scheduled_events+0x222e) [0x55d97eb4e69e] (on Tor 0.3.2.1-alpha 290274dbb5428bc5)
Oct 02 21:27:57.000 [warn] Bug:     ./tor(+0x4c5f1) [0x55d97ea2a5f1] (on Tor 0.3.2.1-alpha 290274dbb5428bc5)
Oct 02 21:27:57.000 [warn] Bug:     ./tor(+0x6bea0) [0x55d97ea49ea0] (on Tor 0.3.2.1-alpha 290274dbb5428bc5)
Oct 02 21:27:57.000 [warn] Bug:     /usr/lib/x86_64-linux-gnu/libevent-2.0.so.5(event_base_loop+0x7fc) [0x7fb3bc4123dc] (on Tor 0.3.2.1-alpha 290274dbb5428bc5)
Oct 02 21:27:57.000 [warn] Bug:     ./tor(do_main_loop+0x244) [0x55d97ea2dad4] (on Tor 0.3.2.1-alpha 290274dbb5428bc5)
Oct 02 21:27:57.000 [warn] Bug:     ./tor(tor_main+0x1c25) [0x55d97ea31315] (on Tor 0.3.2.1-alpha 290274dbb5428bc5)
Oct 02 21:27:57.000 [warn] Bug:     ./tor(main+0x19) [0x55d97ea29229] (on Tor 0.3.2.1-alpha 290274dbb5428bc5)
Oct 02 21:27:57.000 [warn] Bug:     /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5) [0x7fb3bb5fab45] (on Tor 0.3.2.1-alpha 290274dbb5428bc5)
Oct 02 21:27:57.000 [warn] Bug:     ./tor(+0x4b279) [0x55d97ea29279] (on Tor 0.3.2.1-alpha 290274dbb5428bc5)
Oct 02 21:27:58.000 [warn] tor_bug_occurred_(): Bug: src/or/hs_service.c:403: service_intro_point_new: Non-fatal assertion !(!ls) failed. (on Tor 0.3.2.1-alpha 290274dbb5428bc5)
Oct 02 21:27:58.000 [warn] Bug: Non-fatal assertion !(!ls) failed in service_intro_point_new at src/or/hs_service.c:403. Stack trace: (on Tor 0.3.2.1-alpha 290274dbb5428bc5)
Oct 02 21:27:58.000 [warn] Bug:     ./tor(log_backtrace+0x42) [0x55d97eb5dd52] (on Tor 0.3.2.1-alpha 290274dbb5428bc5)
Oct 02 21:27:58.000 [warn] Bug:     ./tor(tor_bug_occurred_+0xb7) [0x55d97eb78ba7] (on Tor 0.3.2.1-alpha 290274dbb5428bc5)
Oct 02 21:27:58.000 [warn] Bug:     ./tor(hs_service_run_scheduled_events+0x222e) [0x55d97eb4e69e] (on Tor 0.3.2.1-alpha 290274dbb5428bc5)
Oct 02 21:27:58.000 [warn] Bug:     ./tor(+0x4c5f1) [0x55d97ea2a5f1] (on Tor 0.3.2.1-alpha 290274dbb5428bc5)
Oct 02 21:27:58.000 [warn] Bug:     ./tor(+0x6bea0) [0x55d97ea49ea0] (on Tor 0.3.2.1-alpha 290274dbb5428bc5)
Oct 02 21:27:58.000 [warn] Bug:     /usr/lib/x86_64-linux-gnu/libevent-2.0.so.5(event_base_loop+0x7fc) [0x7fb3bc4123dc] (on Tor 0.3.2.1-alpha 290274dbb5428bc5)
Oct 02 21:27:58.000 [warn] Bug:     ./tor(do_main_loop+0x244) [0x55d97ea2dad4] (on Tor 0.3.2.1-alpha 290274dbb5428bc5)
Oct 02 21:27:58.000 [warn] Bug:     ./tor(tor_main+0x1c25) [0x55d97ea31315] (on Tor 0.3.2.1-alpha 290274dbb5428bc5)
Oct 02 21:27:58.000 [warn] Bug:     ./tor(main+0x19) [0x55d97ea29229] (on Tor 0.3.2.1-alpha 290274dbb5428bc5)
Oct 02 21:27:58.000 [warn] Bug:     /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5) [0x7fb3bb5fab45] (on Tor 0.3.2.1-alpha 290274dbb5428bc5)
Oct 02 21:27:58.000 [warn] Bug:     ./tor(+0x4b279) [0x55d97ea29279] (on Tor 0.3.2.1-alpha 290274dbb5428bc5)
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