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Terraform v1.10 introduced ephemeral values. This is treated internally as a
ctyvalue marked in the same way as sensitive. In order to send marked values to the plugin, this PR adds a new mark calledmarks.Ephemeraland extends the serialization process like #239.Please note that plugins built with older SDKs (v0.21 and below) that do not include this change will have ephemeral marks discarded on decoding. To prevent unintended disclosure due to this issue, host servers should take measures such as not returning
ctyvalues for older SDKs.If an ephemeral value is converted to a Go literal value, it returns
ErrEphemeral. If you are passing a function callback to theEvaluateExprAPI, this error is ignored internally, just likeErrSensitive, so there is nothing the caller needs to do. If your plugin is directly checking the return value ofEvaluateExprwitherrors.Isor using the deprecatedEnsureNoError, you will need to explicitly handleErrEphemeralor migrate to the function callback approach.