Paul Hinze fe210e6da4 core: Fix interp error msgs on module vars during destroy ... Wow this one was tricky! This bug presents itself only when using planfiles, because when doing a straight `terraform apply` the interpolations are left in place from the Plan graph walk and paper over the issue. (This detail is what made it so hard to reproduce initially.) Basically, graph nodes for module variables are visited during the apply walk and attempt to interpolate. During a destroy walk, no attributes are interpolated from resource nodes, so these interpolations fail. This scenario is supposed to be handled by the `PruneNoopTransformer` - in fact it's described as the example use case in the comment above it! So the bug had to do with the actual behavor of the Noop transformer. The resource nodes were not properly reporting themselves as Noops during a destroy, so they were being left in the graph. This in turn triggered the module variable nodes to see that they had another node depending on them, so they also reported that they could not be pruned. Therefore we had two nodes in the graph that were effectively noops but were being visited anyways. The module variable nodes were already graph leaves, which is why this error presented itself as just stray messages instead of actual failure to destroy. Fixes #5440 Fixes #5708 Fixes #4988 Fixes #3268		2016-05-09 12:18:57 -05:00
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child	core: Fix interp error msgs on module vars during destroy	2016-05-09 12:18:57 -05:00
main.tf	core: Fix interp error msgs on module vars during destroy	2016-05-09 12:18:57 -05:00