Merge pull request #27926 from hashicorp/jbardin/apply-plan-config

check errors before using configSnap

backend/local/backend_local.go

@@ -95,6 +95,10 @@ func (b *Local) context(op *backend.Operation) (*terraform.Context, *configload.
 		}
 		log.Printf("[TRACE] backend/local: building context from plan file")
 		tfCtx, configSnap, ctxDiags = b.contextFromPlanFile(op.PlanFile, opts, stateMeta)
+		if ctxDiags.HasErrors() {
+			return nil, nil, nil, ctxDiags
+		}
+
 		// Write sources into the cache of the main loader so that they are
 		// available if we need to generate diagnostic message snippets.
 		op.ConfigLoader.ImportSourcesFromSnapshot(configSnap)