java.lang.reflect.InvocationTargetException: This exception has no message.

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java.lang.NullPointerException:
at sifive.blocks.devices.i2c.I2CModule$class.$init$(I2C.scala:135)
at sifive.blocks.devices.i2c.TLI2C$$anonfun$19$$anon$2.(I2C.scala:225)
at sifive.blocks.devices.i2c.TLI2C$$anonfun$19.apply(I2C.scala:225)
at sifive.blocks.devices.i2c.TLI2C$$anonfun$19.apply(I2C.scala:225)
at uncore.tilelink2.TLRegisterRouter.module$lzycompute(RegisterRouter.scala:118)
at uncore.tilelink2.TLRegisterRouter.module(RegisterRouter.scala:118)
at diplomacy.LazyModule$$anonfun$instantiate$1$$anonfun$apply$5.apply(LazyModule.scala:55)
at diplomacy.LazyModule$$anonfun$instantiate$1$$anonfun$apply$5.apply(LazyModule.scala:55)
at chisel3.core.Module$.do_apply(Module.scala:35)
at diplomacy.LazyModule$$anonfun$instantiate$1.apply(LazyModule.scala:55)
at diplomacy.LazyModule$$anonfun$instantiate$1.apply(LazyModule.scala:52)
at diplomacy.LazyModule.instantiate(LazyModule.scala:52)
at diplomacy.LazyModuleImp.(LazyModule.scala:133)
at rocketchip.BareTopModule.(BaseTop.scala:24)
at rocketchip.BaseTopModule.(BaseTop.scala:63)
at sifive.enterprise.everywhere.guava.GuavaRocketChipTopModule.(Top.scala:110)
at sifive.enterprise.everywhere.guava.GuavaRocketChipTop.module$lzycompute(Top.scala:87)
at sifive.enterprise.everywhere.guava.GuavaRocketChipTop.module(Top.scala:87)
at sifive.enterprise.everywhere.guava.GuavaTop$$anonfun$2.apply(Top.scala:152)
at sifive.enterprise.everywhere.guava.GuavaTop$$anonfun$2.apply(Top.scala:152)
at chisel3.core.Module$.do_apply(Module.scala:35)
at sifive.enterprise.everywhere.guava.GuavaTop.(Top.scala:152)
at sifive.enterprise.everywhere.guava.TestHarness$$anonfun$8.apply(TestHarness.scala:61)
at sifive.enterprise.everywhere.guava.TestHarness$$anonfun$8.apply(TestHarness.scala:61)
at chisel3.core.Module$.do_apply(Module.scala:35)
at sifive.enterprise.everywhere.guava.TestHarness.(TestHarness.scala:61)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at util.HasGeneratorUtilities$$anonfun$2.apply(GeneratorUtils.scala:47)
at util.HasGeneratorUtilities$$anonfun$2.apply(GeneratorUtils.scala:44)
at chisel3.core.Module$.do_apply(Module.scala:35)
at chisel3.Driver$$anonfun$elaborate$1.apply(Driver.scala:193)
at chisel3.Driver$$anonfun$elaborate$1.apply(Driver.scala:193)
at chisel3.internal.Builder$$anonfun$build$1.apply(Builder.scala:218)
at chisel3.internal.Builder$$anonfun$build$1.apply(Builder.scala:216)
at scala.util.DynamicVariable.withValue(DynamicVariable.scala:58)
at chisel3.internal.Builder$.build(Builder.scala:216)
at chisel3.Driver$.elaborate(Driver.scala:193)
at util.HasGeneratorUtilities$class.elaborate(GeneratorUtils.scala:50)
at sifive.enterprise.generator.EnterpriseGenerator$.elaborate(Generator.scala:40)
at util.GeneratorApp$class.circuit(GeneratorUtils.scala:82)
at sifive.enterprise.generator.EnterpriseGenerator$.circuit$lzycompute(Generator.scala:40)
at sifive.enterprise.generator.EnterpriseGenerator$.circuit(Generator.scala:40)
at util.GeneratorApp$class.generateFirrtl(GeneratorUtils.scala:88)
at sifive.enterprise.generator.EnterpriseGenerator$.generateFirrtl(Generator.scala:40)
at sifive.enterprise.generator.EnterpriseGenerator$.delayedEndpoint$sifive$enterprise$generator$EnterpriseGenerator$1(Generator.scala:42)
at sifive.enterprise.generator.EnterpriseGenerator$delayedInit$body.apply(Generator.scala:40)
at scala.Function0$class.apply$mcV$sp(Function0.scala:34)
at scala.runtime.AbstractFunction0.apply$mcV$sp(AbstractFunction0.scala:12)
at scala.App$$anonfun$main$1.apply(App.scala:76)
at scala.App$$anonfun$main$1.apply(App.scala:76)
at scala.collection.immutable.List.foreach(List.scala:381)
at scala.collection.generic.TraversableForwarder$class.foreach(TraversableForwarder.scala:35)
at scala.App$class.main(App.scala:76)
at sifive.enterprise.generator.EnterpriseGenerator$.main(Generator.scala:40)
at sifive.enterprise.generator.EnterpriseGenerator.main(Generator.scala)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)

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