Replacement breaks conditional code

[marcselman]

Product

dotnet CLI (dotnet new)

Describe The Bug

Note, I've stripped most of the code to show the bare minimum for the bug

I have a .bicep file that contains the following code:

//#if(includeDatabaseContainer)
var cosmosDatabaseContainerName = '__apiNameLower__'
//#endif

In my template.json I have the following symbols:

"symbols": {
    "includeDatabaseContainer": {
        "type": "parameter",
        "datatype": "bool",
        "description": "Whether to include a database container",
        "isRequired": false,
        "defaultValue": "false"
    },
    "apiNameLower": {
        "type": "generated",
        "generator": "casing",
        "parameters": {
            "source": "apiName",
            "toLower": true
        },
        "replaces": "__apiNameLower__",
        "fileRename": "__apiNameLower__",
        "displayName": "Api Name Lower"
    }
}

The __apiNameLower__ replacement works fine throughout all my template files.
But when I pass includeDatabaseContainer true as a parameter the output is not as expected.

For example:

dotnet new MyTemplate --apiName MyApi --includeDatabaseContainer true

I would expect:

var cosmosDatabaseContainerName = 'myapi'

But what I get:

myapi'
...
//#endif

To Reproduce

See the sample code in the bug description.

dotnet Info

output

.NET SDK: Version: 8.0.204 Commit: c338c7548c Workload version: 8.0.200-manifests.00402117

Runtime Environment:
OS Name: Windows
OS Version: 10.0.22631
OS Platform: Windows
RID: win-x64
Base Path: C:\Program Files\dotnet\sdk\8.0.204\

.NET workloads installed:
There are no installed workloads to display.

Host:
Version: 8.0.6
Architecture: x64
Commit: 3b8b000a0e

.NET SDKs installed:
3.0.103 [C:\Program Files\dotnet\sdk]
6.0.321 [C:\Program Files\dotnet\sdk]
7.0.317 [C:\Program Files\dotnet\sdk]
8.0.106 [C:\Program Files\dotnet\sdk]
8.0.204 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
Microsoft.AspNetCore.All 2.1.30 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
Microsoft.AspNetCore.App 2.1.30 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.0.3 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.1.32 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 6.0.26 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 6.0.29 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 7.0.18 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 7.0.20 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.4 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.6 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 2.1.30 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 3.0.3 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 3.1.32 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 6.0.26 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 6.0.29 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 7.0.18 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 7.0.20 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.4 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.6 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 3.0.3 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 3.1.32 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 6.0.26 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 6.0.29 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 7.0.18 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 7.0.20 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 8.0.4 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 8.0.6 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Other architectures found:
x86 [C:\Program Files (x86)\dotnet]
registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\x86\InstallLocation]

Environment variables:
Not set

global.json file:
Not found

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

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

Visual Studio Version

No response

Additional context

No response

[marcselman]

I've figured out the root of the issue.
It happens when //#endif is at the bottom/end of the .bicep file. Then it does not get parsed, I think.
When I add an extra line of code below it, everything works fine.

[Trokkin]

I've stumbled on this issue in my work and was able to find a similar workaround, but it took me a day to figure it out on my own. It's tough when errors are silent.