Fix building projects restored with NuGet 5.7 #14517
Merged
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Description
Fix builds when assets file was created by an earlier version of NuGet.
Bugs:
Customer Impact
This will fix issues where CI builds fail because they download an older version of NuGet.exe and use this for restore.
How found
Azure pipelines canary testing
Test coverage
Automated test coverage is added with this PR
Regression?
Yes.
We had previously decided that we did not need to support building with assets files created by an earlier version of NuGet. We did not realize the impact this would have on CI builds, where it is a common pattern to download NuGet.exe and use it for the restore, and the version of NuGet.exe used may not match the version of NuGet used by the build.
Because of this impact, we have reconsidered this breaking change.
Risk
Low risk that this would break new scenarios.
Medium-low risk that there are some scenarios we haven't found that would still be broken when restoring with a previous NuGet version.