Handle complex calculator results#47506
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Return a friendly calculator error when Mages evaluates an expression to a complex number instead of letting decimal conversion throw. Fixes microsoft#43937
michaeljolley
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Same here @MardSilva. Can you confirm a build/test? |
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I updated my local dev environment according to the dev docs and validated this PR locally. Validation passed:
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/azp run |
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Azure Pipelines successfully started running 1 pipeline(s). |
daverayment
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May 8, 2026
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The fix looks sound, but there's only a single test case at the moment. Although it tests the specific case referred to in the original issue, it would be useful to expand coverage to handle other cases and representations like sqrt(-4), (-1)^0.5 and log(-1).
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Summary of the Pull Request
Return a friendly calculator error when Mages evaluates an expression to a complex number instead of letting decimal conversion throw.
This fixes the PowerToys Run Calculator result for expressions such as
sqrt(-1)by detectingSystem.Numerics.Complexresults before decimal conversion and showing a localized error message instead.Fixes #43937
PR Checklist
Detailed Description of the Pull Request / Additional comments
The Calculator plugin previously passed complex results from Mages into
Convert.ToDecimal, which caused an exception for expressions likesqrt(-1).This PR updates the calculator result transformation logic to detect
System.Numerics.Complexand return a localized user-facing error message:Complex numbers are not supported.It also updates calculator query tests to cover both direct keyword and global query behavior.
Validation Steps Performed
=sqrt(-1)returningComplex numbers are not supported.sqrt(-1)returning no result instead of surfacing an unhandled exception.git diff --check.PlatformToolsetVersionresolves to an empty value during restore/build.