sbt test fail

    at scala.sys.process.ProcessImpl$PipeThread.runloop(ProcessImpl.scala:170)
    at scala.sys.process.ProcessImpl$PipeSource.run(ProcessImpl.scala:188)

I/O error Pipe closed for process: [testfloat_gen, -rnear_maxMag, -tininessbefore, f16_add]
java.io.IOException: Pipe closed
at java.base/java.io.PipedInputStream.checkStateForReceive(PipedInputStream.java:260)
at java.base/java.io.PipedInputStream.awaitSpace(PipedInputStream.java:268)
at java.base/java.io.PipedInputStream.receive(PipedInputStream.java:231)
at java.base/java.io.PipedOutputStream.write(PipedOutputStream.java:149)
at scala.sys.process.BasicIO$.loop$1(BasicIO.scala:240)
at scala.sys.process.BasicIO$.transferFullyImpl(BasicIO.scala:246)
at scala.sys.process.BasicIO$.transferFully(BasicIO.scala:227)
at scala.sys.process.ProcessImpl$PipeThread.runloop(ProcessImpl.scala:170)
at scala.sys.process.ProcessImpl$PipeSource.run(ProcessImpl.scala:188)
I/O error Pipe closed for process: [testfloat_gen, -rminMag, -tininessbefore, -level2, f16_to_f32]
java.io.IOException: Pipe closed
at java.base/java.io.PipedInputStream.checkStateForReceive(PipedInputStream.java:260)
at java.base/java.io.PipedInputStream.awaitSpace(PipedInputStream.java:268)
at java.base/java.io.PipedInputStream.receive(PipedInputStream.java:231)

Start by reproducing the failure with sbt test and capture the complete output around testfloat_gen and the Pipe closed errors. Trace the test invocation and process-handling code that launches testfloat_gen; done means the relevant tests run without the reported I/O errors.