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-rw-r--r--src/main/scala/firrtl/passes/ToWorkingIR.scala4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/main/scala/firrtl/passes/ToWorkingIR.scala b/src/main/scala/firrtl/passes/ToWorkingIR.scala
index 7da94be8..c271302a 100644
--- a/src/main/scala/firrtl/passes/ToWorkingIR.scala
+++ b/src/main/scala/firrtl/passes/ToWorkingIR.scala
@@ -1,10 +1,10 @@
package firrtl.passes
import firrtl.ir._
-import firrtl.options.PreservesAll
import firrtl.Transform
-object ToWorkingIR extends Pass with PreservesAll[Transform] {
+object ToWorkingIR extends Pass {
override def prerequisites = firrtl.stage.Forms.MinimalHighForm
+ override def invalidates(a: Transform) = false
def run(c:Circuit): Circuit = c
}