helper/schema: Guard against a panic if Timeout is not properly

structured

helper/schema/resource_timeout.go

@@ -61,7 +61,7 @@ func (t *ResourceTimeout) ConfigDecode(s *Resource, c *terraform.ResourceConfig)
 	}
 
 	if raw, ok := c.Config["timeout"]; ok {
-		configTimeouts := raw.([]map[string]interface{})
+		if configTimeouts, ok := raw.([]map[string]interface{}); ok {
 			for _, timeoutValues := range configTimeouts {
 				// loop through each Timeout given in the configuration and validate they
 				// the Timeout defined in the resource
@@ -108,6 +108,9 @@ func (t *ResourceTimeout) ConfigDecode(s *Resource, c *terraform.ResourceConfig)
 					*timeout = rt
 				}
 			}
+		} else {
+			log.Printf("[WARN] Invalid Timeout structure found, skipping timeouts")
+		}
 	}
 
 	return nil