vsdbg-ui Crash With No Information

Please paste the output from your clipboard: OK, now that is a cool "reporting" feature!
## Issue Description ##
I've been having vsdbg-ui crashing occasionally but with no usable stack trace.
I saw https://github.com/OmniSharp/omnisharp-vscode/wiki/Diagnosting-'Debug-adapter-process-has-terminated-unexpectedly' which doesn't have information for linux, but I know a little about using "coredumpctl".
I've got ~18 entries for vsdbg-ui and the most I get from those is a Signal 11 (SEGV):
```
Process 18473 (vsdbg-ui) of user 1000 dumped core.

Stack trace of thread 19320:
#0 0x0000000700000000 n/a (n/a)
```
## Steps to Reproduce ##
Even though it supposedly crashed 18 times, I haven't yet noticed what I did when it happened.
I know a bunch of times (didn't seem like 18, but could've), my system would become horribly unresponsive for what seems like 1 minute.
I wouldn't be able to switch windows or minimize or anything.

I was just working on a "Web/Empty" project and also had another instance of vscode open to work on the browser debugging of javascript.
Yes, I know about "serverReadyAction", but there's issues that shouldn't be delved into on top of this issue.

## Expected Behavior ##

## Actual Behavior ##

## Logs ##
I'd love to provide some usable logs, but seem to have none, other than what I mention here.
I found the vsdbg-ui command and saw it has parameters:
```
--engineLogging: Log communications to /home/username/vsdbg-ui.log.
--consoleLogging: Log communications console.
```
That file doesn't exist and and I don't know how I would go about setting the parameters when it's already running in vscode.

### OmniSharp log ###
Post the output from Output-->OmniSharp log here
I've got "omnisharp.loggingLevel": "trace" set and I don't think you want all of that output.
There is no stack information found in there.

### C# log ###
Post the output from Output-->C# here
There is literally nothing in here.
The option is there, but there is no actual output.

## Environment information ##

**VSCode version**: 1.38.0-insider
**C# Extension**: 1.21.1

Mono Information
OmniSharp using built-in mono
Dotnet Information
.NET Core SDK (reflecting any global.json):
Version: 3.0.100-preview8-013656
Commit: 8bf06ffc8d

Runtime Environment:
OS Name: arch
OS Version:
OS Platform: Linux
RID: linux-x64
Base Path: /opt/dotnet/sdk/3.0.100-preview8-013656/

Host (useful for support):
Version: 3.0.0-preview8-28405-07
Commit: d01b2fb7bc

.NET Core SDKs installed:
2.2.105 [/opt/dotnet/sdk]
3.0.100-preview6-012264 [/opt/dotnet/sdk]
3.0.100-preview8-013656 [/opt/dotnet/sdk]

.NET Core runtimes installed:
Microsoft.AspNetCore.App 3.0.0-preview6.19307.2 [/opt/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.0.0-preview8.19405.7 [/opt/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 2.2.3 [/opt/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 3.0.0-preview6-27804-01 [/opt/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 3.0.0-preview8-28405-07 [/opt/dotnet/shared/Microsoft.NETCore.App]

To install additional .NET Core runtimes or SDKs:
https://aka.ms/dotnet-download

Visual Studio Code Extensions

|Extension|Author|Version|
|---|---|---|
|arm|dan-c-underwood|0.3.0|
|cortex-debug|marus25|0.3.0|
|cortex-debug-dp-stm32f1|marus25|1.0.0|
|cortex-debug-dp-stm32f4|marus25|1.0.0|
|cpptools|ms-vscode|0.24.1|
|csharp|ms-vscode|1.21.1|
|debug|webfreak|0.23.1|
|debugger-for-chrome|msjsdiag|4.11.7|
|Doxygen|bbenoist|1.0.0|
|html-snippets|abusaidm|0.2.1|
|ilspy-vscode|icsharpcode|0.7.5|
|linkerscript|ZixuanWang|1.0.0|
|msbuild-project-tools|tintoy|0.2.55|
|mssql|ms-mssql|1.5.0|
|riscv|zhwu95|0.0.4|
|view-in-browser|qinjia|0.0.5|
|vscode-eslint|dbaeumer|1.9.1|
|vscode-nuget-package-manager|jmrog|1.1.6|
|vscode-solution-explorer|fernandoescolar|0.3.1|
|xml|DotJoshJohnson|2.4.0|;