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; RUN: firrtl -i %s -o %s.v -X verilog -p c 2>&1 | tee %s.out | FileCheck %s
; CHECK-NOT: Expression queue.in is used as a sink but can only be used as a source.
; CHECK: Done!
circuit BTB :
module Queue :
input in : UInt<1>
output out : UInt<1>
out <= in
module BTB :
input time : UInt<1>
output out : UInt<1>
inst queue of Queue
queue.in <= time
out <= queue.in
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