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[dotnet.js] is not incremental #63207

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dotnet/runtime
#118637
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[dotnet.js] is not incremental#63207
Bug
dotnet/runtime
#118637
Assignees
maraf
Labels
area-blazorIncludes: Blazor, Razor Componentsfeature-blazor-wasmThis issue is related to and / or impacts Blazor WebAssembly
Milestone
10.0-rc1

Description

@jjonescz
jjonescz
opened on Jul 8, 2025

SDK version: 10p5 or local build (feb621b704347e6fb72b816a257f1ba2fdc6a385)
Steps to reproduce:

  1. dotnet new blazorwasm
  2. dotnet build
  3. dotnet build -bl -question

Expected: success
Actual: fails with

MSBUILD : error : Building target "_BuildCopyStaticWebAssetsPreserveNewest" partially, because some output files are out of date with respect to their input files.

And in the binlog I can see the problem is obj\Debug\net10.0\dotnet.js.

Activity

  1. jjonescz
    added the
    Bug
    issue type on Jul 8, 2025
  2. dotnet-policy-service
    added
    untriaged
    on Jul 8, 2025

  3. MackinnonBuck commented on Jul 9, 2025

    @MackinnonBuck
    MackinnonBuck
    on Jul 9, 2025
    Member

    cc @javiercn

  4. javiercn
    assigned
    maraf
    on Aug 9, 2025
  5. javiercn
    removed
    untriaged
    on Aug 9, 2025
  6. javiercn
    transferred this issue fromdotnet/sdkon Aug 9, 2025
  7. javiercn
    added the
    Bug
    issue type on Aug 9, 2025
  8. github-actions
    added
    area-infrastructureIncludes: MSBuild projects/targets, build scripts, CI, Installers and shared framework
    on Aug 9, 2025
  9. javiercn
    added
    area-blazorIncludes: Blazor, Razor Components
    feature-blazor-wasmThis issue is related to and / or impacts Blazor WebAssembly
    and removed
    area-infrastructureIncludes: MSBuild projects/targets, build scripts, CI, Installers and shared framework
    on Aug 9, 2025
  10. javiercn
    added this to the 10.0-rc1 milestone on Aug 11, 2025

  11. maraf commented on Aug 12, 2025

    @maraf
    maraf
    on Aug 12, 2025
    Member

    It happens for .NET 9 as well

    Building target "_BuildCopyStaticWebAssetsPreserveNewest" partially, because some output files are out of date with respect to their input files. [/Users/marekfisera/Development/samples/BlazorWasm/BlazorWasm.csproj]
  12. javiercn
    changed the title [-]Static web asset building is not incremental[/-] [+][dotnet.js] is not incremental[/+] on Aug 13, 2025
  13. maraf
    closed this as completedin runtime#118637on Aug 13, 2025
  14. lewing
    added a commit that references this issue on Jun 22, 2026

    [browser] Wasm boot JSON: touch a stamp, not the boot JSON itself (fix …

    7f00936
  15. eiriktsarpalis
    added a commit that references this issue on Jul 15, 2026

    [browser] Wasm boot JSON: touch a stamp, not the boot JSON itself (fix …

    591de2b
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area-blazorIncludes: Blazor, Razor Componentsfeature-blazor-wasmThis issue is related to and / or impacts Blazor WebAssembly

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