SCSS compiled to empty CSS with BuildWebCompiler2022 1.14.15 (works in 1.14.10)

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Title: SCSS compiled to empty CSS with BuildWebCompiler2022 1.14.15 (works in 1.14.10)

Environment

• Visual Studio 2022 (latest at time of writing)
• .NET SDK: .NET 8.0
• Project type: ASP.NET Core Web (Sdk =Microsoft.NET.Sdk.Web)
• OS: Windows 10/11
• Package: BuildWebCompiler2022
• Working version: 1.14.10
• Problem version: 1.14.15

Project setup
.csproj (relevant parts):
net8.0enableenable

compilerconfig.json:
[
{
"outputFile": "wwwroot/Content/css/StyleSheet.css",
"inputFile": "wwwroot/Content/scss/StyleSheet.scss"
}
]

Folder structure under the project root:

• wwwroot/Content/scss/StyleSheet.scss
• wwwroot/Content/css/StyleSheet.css

Minimal SCSS content (repro):
body {
h1 {
color: green;
}
}

Steps to reproduce

1. Create the project structure above withBuildWebCompiler2022 1.14.15referenced.
2. Add compilerconfig.json as shown.
3. Create wwwroot/Content/scss/StyleSheet.scss with the SCSS snippet above.
4. Build the project in Visual Studio 2022 (or viadotnet build).

Expected behaviour

• Build succeeds.
• wwwroot/Content/css/StyleSheet.css contains:
  (or equivalent expanded output).

Actual behaviour with 1.14.15

• Build succeeds (no visible errors or warnings in the Build output).
• wwwroot/Content/css/StyleSheet.css is recreated but empty (0 bytes or no CSS rules).
• If the CSS file is deleted before build, it is recreated as an empty file.
• No clear indication in the build log that compilation failed or skipped.

Comparison with 1.14.10

• If I change only the package version in the .csprojto:

and keep everything else exactly the same:

• Build succeeds.
• StyleSheet.css is generated correctly with the expected CSS content.

So the same project, config, and SCSS:

• Works as expected in 1.14.10.
• Produces an empty CSS file (without errors) in1.14.15.

Notes

• Using the official sass npm package (sass wwwroot/Content/scss:wwwroot/Content/css) on the same SCSS file produces correct CSS, confirming the SCSS itself and paths are valid.
• This suggests a regression or breaking change between 1.14.10 and 1.14.15 where SCSS compilation can silently fail or produce empty output without logging an error.

body h1 {
color: green;
}