Parser throws error on [

[ThomasNieto]

Prerequisites

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• Make sure you are able to repro it on the latest version
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Summary

If the property value contains a [ the parser thinks its the beginning of a function.

Steps to reproduce

$schema: https://aka.ms/dsc/schemas/v3/bundled/config/document.json
resources:
- name: Install Pester
  type: AnyPackageDsc/Package
  properties:
    Name: Pester
    Version: '[5.0,6.0)'
    Provider: AnyPackage.PSResourceGet\PSResourceGet
    Source: PSGallery
    Ensure: Present

Expected behavior

Parses string literal

Actual behavior

ERROR Parser: Unable to parse statement root: [5.0,6.0)

Error details

ERROR Parser: Unable to parse statement root: [5.0,6.0)

Environment data

7.6-preview4

Version

3.2-preview3

Visuals

No response

[SteveL-MSFT]

Per ARM rules, you need to "escape" the opening square bracket with a square bracket [[5.0.6.0] https://learn.microsoft.com/en-us/azure/azure-resource-manager/templates/template-expressions#escape-characters

Maybe something we could do is check for this specific case and give a specific error message to escape it.

[ThomasNieto]

@SteveL-MSFT adding that extra [ didn't fix it.

 dsc config get -f C:\temp\module.dsc.config.yaml
2025-08-04T18:58:33.316135Z ERROR Parser: Unable to parse statement root: [5.0,6.0)

dsc config get -f C:\temp\module.dsc.config.yaml
2025-08-04T18:59:06.891977Z ERROR Parser: Unable to parse statement root: [5.0,6.0]

[SteveL-MSFT]

@ThomasNieto I'll take a look

[SteveL-MSFT]

@ThomasNieto can you give me a repro using the Echo resource?

[ThomasNieto]

@SteveL-MSFT it works using Echo but not a PS Adapter resource.

[SteveL-MSFT]

@SteveL-MSFT it works using Echo but not a PS Adapter resource.

Ok, in that case, I think the problem is that the string gets unescaped and passed to the adapter which then errors because the escape is missing. For now, you might be able to workaround it by double escaping: [[[5.0,6.0]