channelpadding_timers test failed on tor-0.3.5.8

weasel reported the following test failure today:

channelpadding/channelpadding_timers: [forking] Feb 22 09:58:55.345 [err] tor_assertion_failed_(): Bug: ../src/test/testing_rsakeys.c:540: 
init_pregenerated_keys: Assertion r == 0 failed; aborting. (on Tor 0.3.5.8 )
Feb 22 09:58:55.347 [err] Bug: Assertion r == 0 failed in init_pregenerated_keys at ../src/test/testing_rsakeys.c:540. Stack trace: (on Tor 0.3.5.8 )
Feb 22 09:58:55.348 [err] Bug:     ./src/test/test(log_backtrace_impl+0x84) [0x569abc28] (on Tor 0.3.5.8 )
Feb 22 09:58:55.348 [err] Bug:     ./src/test/test(tor_assertion_failed_+0xc4) [0x569a67b8] (on Tor 0.3.5.8 )
Feb 22 09:58:55.348 [err] Bug:     ./src/test/test(init_pregenerated_keys+0x198) [0x5678f770] (on Tor 0.3.5.8 )
Feb 22 09:58:55.349 [err] Bug:     ./src/test/test(testcase_run_one+0x284) [0x5678fb14] (on Tor 0.3.5.8 )
Feb 22 09:58:55.349 [err] Bug:     ./src/test/test(tinytest_main+0x188) [0x56790490] (on Tor 0.3.5.8 )
Feb 22 09:58:55.349 [err] Bug:     ./src/test/test(main+0x43c) [0x563dca5c] (on Tor 0.3.5.8 )
Feb 22 09:58:55.349 [err] Bug:     /lib/mips-linux-gnu/libc.so.6(__libc_start_main+0x108) [0x76d422b8] (on Tor 0.3.5.8 )
Feb 22 09:58:55.350 [err] Bug:     ./src/test/test(+0x5fbd4) [0x563dcbd4] (on Tor 0.3.5.8 )
[Lost connection!] 
  [channelpadding_timers FAILED]
channeltls/create: [forking] OK

from https://buildd.debian.org/status/fetch.php?pkg=tor&arch=mips&ver=0.3.5.8-1&stamp=1550830462&raw=0

Apparently, if this is not dealt with, it'll mean 0.3.5.8 will not ship with the next Debian