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global using produces unnecessary TypeRef in output file #68250

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filipnavara opened this issue May 18, 2023 · 2 comments
Closed

global using produces unnecessary TypeRef in output file #68250

filipnavara opened this issue May 18, 2023 · 2 comments
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Area-Compilers untriaged Issues and PRs which have not yet been triaged by a lead

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@filipnavara
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global using nfloat = global::System.Runtime.InteropServices.NFloat;

in combination with <OutputType>exe</OutputType> always produces extra TypeRef in the output for NFloat even if the alias or the NFloat type is never used in the source code.

Repro: extra-typeref.zip

Steps to reproduce:

  • dotnet build
  • Check output with mdv bin\Debug\net7.0\extra-typeref.dll (see https://github.com/dotnet/metadata-tools for instructions on how to install mdv).
  • Observe that unused TypeRef is produced in the output: 11: 0x23000002 (AssemblyRef) 'NFloat' (#283) 'System.Runtime.InteropServices' (#20d)
@dotnet-issue-labeler dotnet-issue-labeler bot added Area-Compilers untriaged Issues and PRs which have not yet been triaged by a lead labels May 18, 2023
@filipnavara filipnavara mentioned this issue May 18, 2023
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@filipnavara
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Observation suggests that it may be related to the emitted debug information. An extra confirmation would be welcome.

@filipnavara
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Duplicate of #31192 (closed as "by design").

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