On Ubuntu 20.04, serve-d 0.7.4 runs well, but serve-d 0.7.5 - segment fault

[Reliauk]

Steps to reproduce:

1. Download 
[0.7.5](https://github.com/Pure-D/serve-d/releases/download/v0.7.5/serve-d_0.7.5-linux-x86_64.tar.xz). Extract. Run.

Segment Fault (Core Dumped). No information.

2. Download 
[0.7.4](https://github.com/Pure-D/serve-d/releases/download/v0.7.4/serve-d_0.7.4-linux-x86_64.tar.xz). Extract. Run. Succeed.

serve-d v0.7.4 with workspace-d v3.7.0
Included features: "d", "workspaces"
Built: Fri Jan  7 16:32:21 2022
with compiler LDC v2.98 on linux littleEndian
dub, dfmt and dscanner are bundled within (compiled in)