Poorly formatted launchSettings.json and dotnet watch goes into production

[JohnLErvin]

Describe the bug

With an extra comma in the launchSettings.json file, dotnet watch goes into production mode by default.

To Reproduce

dotnet new web Api
cd Api 

Change launchSettings.json to the following leaving the superfluous comma after the "http" profile

{
  "$schema": "http://json.schemastore.org/launchsettings.json",
  "profiles": {
    "http": {
      "commandName": "Project",
      "dotnetRunMessages": true,
      "launchBrowser": true,
      "applicationUrl": "http://localhost:9001",
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      }
    },
  }
}

Now dotnet run will host as development while dotnet watch will host as production. ASPNETCORE_ENVIRONMENT=Development dotnet watch doesn't save you, but deleting the extra comma does.

Exceptions (if any)

None noted.

Further technical details

Working with VSCode

.NET SDK:
Version: 8.0.404
Commit: 7b190310f2
Workload version: 8.0.400-manifests.22517898
MSBuild version: 17.11.9+a69bbaaf5

Runtime Environment:
OS Name: debian
OS Version: 12
OS Platform: Linux
RID: linux-x64
Base Path: /usr/share/dotnet/sdk/8.0.404/

.NET workloads installed:
Configured to use loose manifests when installing new manifests.
There are no installed workloads to display.

Host:
Version: 8.0.11
Architecture: x64
Commit: 9cb3b725e3

.NET SDKs installed:
6.0.428 [/usr/share/dotnet/sdk]
7.0.410 [/usr/share/dotnet/sdk]
8.0.404 [/usr/share/dotnet/sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 6.0.36 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 7.0.20 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.11 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 6.0.36 [/usr/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 7.0.20 [/usr/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.11 [/usr/share/dotnet/shared/Microsoft.NETCore.App]

Other architectures found:
None

Environment variables:
Not set

global.json file:
Not found

Learn more:
https://aka.ms/dotnet/info

Download .NET:
https://aka.ms/dotnet/download

[dotnet-issue-labeler]

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[dotnet-issue-labeler]

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[tmat]

@JohnLErvin Can you try .NET 9? It seems to work there.

[KalleOlaviNiemitalo]

For .NET 8, this seems a duplicate of #38323.