qv2ray-git: terminated by SIGTRAP when trying to test latency

[SamLukeYes]

When trying to test latency, qv2ray quits with the following output:

terminate called after throwing an instance of 'std::bad_function_call'
  what():  bad_function_call
Signal: 6
fish: Job 1, 'qv2ray' terminated by signal SIGTRAP (Trace or breakpoint trap)

Tested on GNOME, with qv2ray-git 3.0.0.rc1.r19.g7898f0e2-1. Besides qv2ray-git, AUR package qv2ray-v3, which builds exactly from tag v3.0.0-rc1, also has this issue, while qv2ray-static-nightly-bin seems to be OK.