It happens with 2.11, you'll have to do both:
./dev/change-scala-version.sh 2.11
mvn -Pyarn -Phadoop-2.4 -Dscala-2.11 -DskipTests clean package
you get that error if you forget one IIRC.
2015-12-05 20:17 GMT+08:00 MrAsanjar . <afsan...@gmail.com>:
> Simon, I am getting the same error, how did you resolved the problem.
>
> On Fri, Oct 16, 2015 at 9:54 AM, Simon Hafner <reactorm...@gmail.com> wrote:
>>
>> Fresh clone of spark 1.5.1, java version "1.7.0_85"
>>
>> build/mvn -Pyarn -Phadoop-2.4 -Dhadoop.version=2.4.0 -DskipTests clean
>> package
>>
>> [error] bad symbolic reference. A signature in WebUI.class refers to
>> term eclipse
>> [error] in package org which is not available.
>> [error] It may be completely missing from the current classpath, or
>> the version on
>> [error] the classpath might be incompatible with the version used when
>> compiling WebUI.class.
>> [error] bad symbolic reference. A signature in WebUI.class refers to term
>> jetty
>> [error] in value org.eclipse which is not available.
>> [error] It may be completely missing from the current classpath, or
>> the version on
>> [error] the classpath might be incompatible with the version used when
>> compiling WebUI.class.
>> [error]
>> [error] while compiling:
>> /root/spark/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
>> [error] during phase: erasure
>> [error] library version: version 2.10.4
>> [error] compiler version: version 2.10.4
>> [error] reconstructed args: -deprecation -classpath
>>
>> /root/spark/sql/core/target/scala-2.10/classes:/root/.m2/repository/org/apache/spark/spark-core_2.10/1.6.0-SNAPSHOT/spark-core_2.10-1.6.0-SNAPSHOT.jar:/root/.m
>>
>> 2/repository/org/apache/avro/avro-mapred/1.7.7/avro-mapred-1.7.7-hadoop2.jar:/root/.m2/repository/org/apache/avro/avro-ipc/1.7.7/avro-ipc-1.7.7.jar:/root/.m2/repository/org/apache/avro/avro-ipc/1.7.7/avro-ipc-1.7.
>>
>> 7-tests.jar:/root/.m2/repository/com/twitter/chill_2.10/0.5.0/chill_2.10-0.5.0.jar:/root/.m2/repository/com/esotericsoftware/kryo/kryo/2.21/kryo-2.21.jar:/root/.m2/repository/com/esotericsoftware/reflectasm/reflec
>>
>> tasm/1.07/reflectasm-1.07-shaded.jar:/root/.m2/repository/com/esotericsoftware/minlog/minlog/1.2/minlog-1.2.jar:/root/.m2/repository/com/twitter/chill-java/0.5.0/chill-java-0.5.0.jar:/root/.m2/repository/org/apach
>>
>> e/hadoop/hadoop-client/2.4.0/hadoop-client-2.4.0.jar:/root/.m2/repository/org/apache/hadoop/hadoop-common/2.4.0/hadoop-common-2.4.0.jar:/root/.m2/repository/commons-cli/commons-cli/1.2/commons-cli-1.2.jar:/root/.m
>>
>> 2/repository/xmlenc/xmlenc/0.52/xmlenc-0.52.jar:/root/.m2/repository/commons-httpclient/commons-httpclient/3.1/commons-httpclient-3.1.jar:/root/.m2/repository/commons-collections/commons-collections/3.2.1/commons-
>>
>> collections-3.2.1.jar:/root/.m2/repository/commons-configuration/commons-configuration/1.6/commons-configuration-1.6.jar:/root/.m2/repository/commons-digester/commons-digester/1.8/commons-digester-1.8.jar:/root/.m
>>
>> 2/repository/commons-beanutils/commons-beanutils/1.7.0/commons-beanutils-1.7.0.jar:/root/.m2/repository/commons-beanutils/commons-beanutils-core/1.8.0/commons-beanutils-core-1.8.0.jar:/root/.m2/repository/org/apac
>>
>> he/hadoop/hadoop-auth/2.4.0/hadoop-auth-2.4.0.jar:/root/.m2/repository/org/apache/hadoop/hadoop-hdfs/2.4.0/hadoop-hdfs-2.4.0.jar:/root/.m2/repository/org/mortbay/jetty/jetty-util/6.1.26/jetty-util-6.1.26.jar:/root
>>
>> /.m2/repository/org/apache/hadoop/hadoop-mapreduce-client-app/2.4.0/hadoop-mapreduce-client-app-2.4.0.jar:/root/.m2/repository/org/apache/hadoop/hadoop-mapreduce-client-common/2.4.0/hadoop-mapreduce-client-common-
>>
>> 2.4.0.jar:/root/.m2/repository/org/apache/hadoop/hadoop-yarn-client/2.4.0/hadoop-yarn-client-2.4.0.jar:/root/.m2/repository/com/sun/jersey/jersey-client/1.9/jersey-client-1.9.jar:/root/.m2/repository/org/apache/ha
>>
>> doop/hadoop-yarn-server-common/2.4.0/hadoop-yarn-server-common-2.4.0.jar:/root/.m2/repository/org/apache/hadoop/hadoop-mapreduce-client-shuffle/2.4.0/hadoop-mapreduce-client-shuffle-2.4.0.jar:/root/.m2/repository/
>>
>> org/apache/hadoop/hadoop-yarn-api/2.4.0/hadoop-yarn-api-2.4.0.jar:/root/.m2/repository/org/apache/hadoop/hadoop-mapreduce-client-core/2.4.0/hadoop-mapreduce-client-core-2.4.0.jar:/root/.m2/repository/org/apache/ha
>>
>> doop/hadoop-yarn-common/2.4.0/hadoop-yarn-common-2.4.0.jar:/root/.m2/repository/javax/xml/bind/jaxb-api/2.2.2/jaxb-api-2.2.2.jar:/root/.m2/repository/javax/xml/stream/stax-api/1.0-2/stax-api-1.0-2.jar:/root/.m2/re
>>
>> pository/org/apache/hadoop/hadoop-mapreduce-client-jobclient/2.4.0/hadoop-mapreduce-client-jobclient-2.4.0.jar:/root/.m2/repository/org/apache/hadoop/hadoop-annotations/2.4.0/hadoop-annotations-2.4.0.jar:/root/.m2
>>
>> /repository/org/apache/spark/spark-launcher_2.10/1.6.0-SNAPSHOT/spark-launcher_2.10-1.6.0-SNAPSHOT.jar:/root/.m2/repository/org/apache/spark/spark-network-common_2.10/1.6.0-SNAPSHOT/spark-network-common_2.10-1.6.0
>>
>> -SNAPSHOT.jar:/root/.m2/repository/org/apache/spark/spark-network-shuffle_2.10/1.6.0-SNAPSHOT/spark-network-shuffle_2.10-1.6.0-SNAPSHOT.jar:/root/.m2/repository/org/fusesource/leveldbjni/leveldbjni-all/1.8/leveldb
>>
>> jni-all-1.8.jar:/root/.m2/repository/org/apache/spark/spark-unsafe_2.10/1.6.0-SNAPSHOT/spark-unsafe_2.10-1.6.0-SNAPSHOT.jar:/root/.m2/repository/net/java/dev/jets3t/jets3t/0.9.3/jets3t-0.9.3.jar:/root/.m2/reposito
>>
>> ry/org/apache/httpcomponents/httpcore/4.3.2/httpcore-4.3.2.jar:/root/.m2/repository/org/apache/httpcomponents/httpclient/4.3.2/httpclient-4.3.2.jar:/root/.m2/repository/javax/activation/activation/1.1.1/activation
>>
>> -1.1.1.jar:/root/.m2/repository/mx4j/mx4j/3.0.2/mx4j-3.0.2.jar:/root/.m2/repository/javax/mail/mail/1.4.7/mail-1.4.7.jar:/root/.m2/repository/org/bouncycastle/bcprov-jdk15on/1.51/bcprov-jdk15on-1.51.jar:/root/.m2/
>>
>> repository/com/jamesmurty/utils/java-xmlbuilder/1.0/java-xmlbuilder-1.0.jar:/root/.m2/repository/net/iharder/base64/2.3.8/base64-2.3.8.jar:/root/.m2/repository/org/apache/curator/curator-recipes/2.4.0/curator-reci
>>
>> pes-2.4.0.jar:/root/.m2/repository/org/apache/curator/curator-framework/2.4.0/curator-framework-2.4.0.jar:/root/.m2/repository/org/apache/curator/curator-client/2.4.0/curator-client-2.4.0.jar:/root/.m2/repository/
>>
>> org/apache/zookeeper/zookeeper/3.4.5/zookeeper-3.4.5.jar:/root/.m2/repository/jline/jline/0.9.94/jline-0.9.94.jar:/root/.m2/repository/com/google/guava/guava/14.0.1/guava-14.0.1.jar:/root/.m2/repository/org/eclips
>>
>> e/jetty/orbit/javax.servlet/3.0.0.v201112011016/javax.servlet-3.0.0.v201112011016.jar:/root/.m2/repository/org/apache/commons/commons-lang3/3.3.2/commons-lang3-3.3.2.jar:/root/.m2/repository/org/apache/commons/com
>>
>> mons-math3/3.4.1/commons-math3-3.4.1.jar:/root/.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar:/root/.m2/repository/org/slf4j/slf4j-api/1.7.10/slf4j-api-1.7.10.jar:/root/.m2/repository/org/sl
>>
>> f4j/jul-to-slf4j/1.7.10/jul-to-slf4j-1.7.10.jar:/root/.m2/repository/org/slf4j/jcl-over-slf4j/1.7.10/jcl-over-slf4j-1.7.10.jar:/root/.m2/repository/log4j/log4j/1.2.17/log4j-1.2.17.jar:/root/.m2/repository/org/slf4
>>
>> j/slf4j-log4j12/1.7.10/slf4j-log4j12-1.7.10.jar:/root/.m2/repository/com/ning/compress-lzf/1.0.3/compress-lzf-1.0.3.jar:/root/.m2/repository/org/xerial/snappy/snappy-java/1.1.1.7/snappy-java-1.1.1.7.jar:/root/.m2/
>>
>> repository/net/jpountz/lz4/lz4/1.3.0/lz4-1.3.0.jar:/root/.m2/repository/org/roaringbitmap/RoaringBitmap/0.4.5/RoaringBitmap-0.4.5.jar:/root/.m2/repository/commons-net/commons-net/2.2/commons-net-2.2.jar:/root/.m2/
>>
>> repository/com/typesafe/akka/akka-remote_2.10/2.3.11/akka-remote_2.10-2.3.11.jar:/root/.m2/repository/com/typesafe/akka/akka-actor_2.10/2.3.11/akka-actor_2.10-2.3.11.jar:/root/.m2/repository/com/typesafe/config/1.
>>
>> 2.1/config-1.2.1.jar:/root/.m2/repository/io/netty/netty/3.8.0.Final/netty-3.8.0.Final.jar:/root/.m2/repository/com/google/protobuf/protobuf-java/2.5.0/protobuf-java-2.5.0.jar:/root/.m2/repository/org/uncommons/ma
>>
>> ths/uncommons-maths/1.2.2a/uncommons-maths-1.2.2a.jar:/root/.m2/repository/com/typesafe/akka/akka-slf4j_2.10/2.3.11/akka-slf4j_2.10-2.3.11.jar:/root/.m2/repository/org/json4s/json4s-jackson_2.10/3.2.10/json4s-jack
>>
>> son_2.10-3.2.10.jar:/root/.m2/repository/org/json4s/json4s-core_2.10/3.2.10/json4s-core_2.10-3.2.10.jar:/root/.m2/repository/org/json4s/json4s-ast_2.10/3.2.10/json4s-ast_2.10-3.2.10.jar:/root/.m2/repository/org/sc
>>
>> ala-lang/scalap/2.10.4/scalap-2.10.4.jar:/root/.m2/repository/org/scala-lang/scala-compiler/2.10.4/scala-compiler-2.10.4.jar:/root/.m2/repository/com/sun/jersey/jersey-server/1.9/jersey-server-1.9.jar:/root/.m2/re
>>
>> pository/asm/asm/3.1/asm-3.1.jar:/root/.m2/repository/com/sun/jersey/jersey-core/1.9/jersey-core-1.9.jar:/root/.m2/repository/org/apache/mesos/mesos/0.21.1/mesos-0.21.1-shaded-protobuf.jar:/root/.m2/repository/io/
>>
>> netty/netty-all/4.0.29.Final/netty-all-4.0.29.Final.jar:/root/.m2/repository/com/clearspring/analytics/stream/2.7.0/stream-2.7.0.jar:/root/.m2/repository/io/dropwizard/metrics/metrics-core/3.1.2/metrics-core-3.1.2
>>
>> .jar:/root/.m2/repository/io/dropwizard/metrics/metrics-jvm/3.1.2/metrics-jvm-3.1.2.jar:/root/.m2/repository/io/dropwizard/metrics/metrics-json/3.1.2/metrics-json-3.1.2.jar:/root/.m2/repository/io/dropwizard/metri
>>
>> cs/metrics-graphite/3.1.2/metrics-graphite-3.1.2.jar:/root/.m2/repository/com/fasterxml/jackson/module/jackson-module-scala_2.10/2.4.4/jackson-module-scala_2.10-2.4.4.jar:/root/.m2/repository/com/thoughtworks/para
>>
>> namer/paranamer/2.6/paranamer-2.6.jar:/root/.m2/repository/org/apache/ivy/ivy/2.4.0/ivy-2.4.0.jar:/root/.m2/repository/oro/oro/2.0.8/oro-2.0.8.jar:/root/.m2/repository/org/tachyonproject/tachyon-client/0.7.1/tachy
>>
>> on-client-0.7.1.jar:/root/.m2/repository/commons-lang/commons-lang/2.6/commons-lang-2.6.jar:/root/.m2/repository/commons-io/commons-io/2.4/commons-io-2.4.jar:/root/.m2/repository/org/tachyonproject/tachyon-underfs-hdfs/0.7.1/tachyon-underfs-hdfs-0.7.1.jar:/root/.m2/repository/org/tachyonproject/tachyon-underfs-local/0.7.1/tachyon-underfs-local-0.7.1.jar:/root/.m2/repository/net/razorvine/pyrolite/4.4/pyrolite-4.4.jar:/root
>>
>> /.m2/repository/net/sf/py4j/py4j/0.8.2.1/py4j-0.8.2.1.jar:/root/.m2/repository/org/apache/spark/spark-catalyst_2.10/1.6.0-SNAPSHOT/spark-catalyst_2.10-1.6.0-SNAPSHOT.jar:/root/.m2/repository/org/scala-lang/scala-r
>>
>> eflect/2.10.4/scala-reflect-2.10.4.jar:/root/.m2/repository/org/codehaus/janino/janino/2.7.8/janino-2.7.8.jar:/root/.m2/repository/org/codehaus/janino/commons-compiler/2.7.8/commons-compiler-2.7.8.jar:/root/.m2/re
>>
>> pository/org/apache/parquet/parquet-column/1.7.0/parquet-column-1.7.0.jar:/root/.m2/repository/org/apache/parquet/parquet-common/1.7.0/parquet-common-1.7.0.jar:/root/.m2/repository/org/apache/parquet/parquet-encod
>>
>> ing/1.7.0/parquet-encoding-1.7.0.jar:/root/.m2/repository/org/apache/parquet/parquet-generator/1.7.0/parquet-generator-1.7.0.jar:/root/.m2/repository/commons-codec/commons-codec/1.10/commons-codec-1.10.jar:/root/.
>>
>> m2/repository/org/apache/parquet/parquet-hadoop/1.7.0/parquet-hadoop-1.7.0.jar:/root/.m2/repository/org/apache/parquet/parquet-format/2.3.0-incubating/parquet-format-2.3.0-incubating.jar:/root/.m2/repository/org/a
>>
>> pache/parquet/parquet-jackson/1.7.0/parquet-jackson-1.7.0.jar:/root/.m2/repository/org/codehaus/jackson/jackson-mapper-asl/1.9.13/jackson-mapper-asl-1.9.13.jar:/root/.m2/repository/org/codehaus/jackson/jackson-cor
>>
>> e-asl/1.9.13/jackson-core-asl-1.9.13.jar:/root/.m2/repository/com/fasterxml/jackson/core/jackson-databind/2.4.4/jackson-databind-2.4.4.jar:/root/.m2/repository/com/fasterxml/jackson/core/jackson-annotations/2.4.4/
>>
>> jackson-annotations-2.4.4.jar:/root/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.4.4/jackson-core-2.4.4.jar:/root/.m2/repository/org/apache/avro/avro/1.7.7/avro-1.7.7.jar:/root/.m2/repository/org/apach
>>
>> e/commons/commons-compress/1.4.1/commons-compress-1.4.1.jar:/root/.m2/repository/org/tukaani/xz/1.0/xz-1.0.jar:/root/.m2/repository/org/objenesis/objenesis/1.0/objenesis-1.0.jar:/root/.m2/repository/org/spark-proj
>> ect/spark/unused/1.0.0/unused-1.0.0.jar -feature -bootclasspath
>>
>> /usr/lib/jvm/java-1.7.0-openjdk-1.7.0.85.x86_64/jre/lib/resources.jar:/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.85.x86_64/jre/lib/rt.jar:/usr/lib/jvm/jav
>>
>> a-1.7.0-openjdk-1.7.0.85.x86_64/jre/lib/sunrsasign.jar:/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.85.x86_64/jre/lib/jsse.jar:/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.85.x86_64/jre/lib/jce.jar:/usr/lib/jvm/java-1.7.0-openj
>>
>> dk-1.7.0.85.x86_64/jre/lib/charsets.jar:/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.85.x86_64/jre/lib/rhino.jar:/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.85.x86_64/jre/lib/jfr.jar:/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.85.x8
>>
>> 6_64/jre/classes:/root/.m2/repository/org/scala-lang/scala-library/2.10.4/scala-library-2.10.4.jar
>> -unchecked
>> [error]
>> [error] last tree to typer: TypeTree(trait Seq)
>> [error] symbol: trait Seq in package collection (flags:
>> <interface> abstract <trait> <lateinterface>)
>> [error] symbol definition: abstract trait Seq[+A] extends
>> PartialFunction[Int,A] with Iterable[A] with GenSeq[A] with
>> GenericTraversableTemplate[A,Seq] with SeqLike[A,Seq[A]]
>> [error] tpe: Seq
>> [error] symbol owners: trait Seq -> package collection
>> [error] context owners: anonymous class $anonfun -> method
>> createListenerAndUI -> object SQLContext -> package sql
>> [error]
>> [error] == Enclosing template or block ==
>> [error]
>> [error] ClassDef( // final class $anonfun extends
>>
>> AbstractFunction1[org.apache.spark.ui.SparkUI,org.apache.spark.sql.execution.ui.SQLTab]
>> with Serializable
>> [error] final <synthetic> @{ SerialVersionUID(0) }
>> [error] "$anonfun"
>> [error] []
>> [error] Template( // val <local $anonfun>: <notype>,
>>
>> tree.tpe=scala.runtime.AbstractFunction1[org.apache.spark.ui.SparkUI,org.apache.spark.sql.execution.ui.SQLTab]
>> with Serializable
>> [error] "scala.runtime.AbstractFunction1", "scala.Serializable" //
>> parents
>> [error] ValDef(
>> [error] private
>> [error] "_"
>> [error] <tpt>
>> [error] <empty>
>> [error] )
>> [error] // 2 statements
>> [error] DefDef( // def <init>():
>>
>> scala.runtime.AbstractFunction1[org.apache.spark.ui.SparkUI,org.apache.spark.sql.execution.ui.SQLTab]
>> with Serializable
>> [error] <method> <triedcooking>
>> [error] "<init>"
>> [error] []
>> [error] List(Nil)
>> [error] <tpt> //
>>
>> tree.tpe=scala.runtime.AbstractFunction1[org.apache.spark.ui.SparkUI,org.apache.spark.sql.execution.ui.SQLTab]
>> with Serializable
>> [error] Block( // tree.tpe=Unit
>> [error] Apply( // def <init>():
>> scala.runtime.AbstractFunction1[T1,R] in class AbstractFunction1,
>>
>> tree.tpe=scala.runtime.AbstractFunction1[org.apache.spark.ui.SparkUI,org.apache.spark.sql.execution.ui.SQLT
>> ab]
>> [error] $anonfun.super."<init>" // def <init>():
>> scala.runtime.AbstractFunction1[T1,R] in class AbstractFunction1,
>>
>> tree.tpe=()scala.runtime.AbstractFunction1[org.apache.spark.ui.SparkUI,org.apache.spark.
>> sql.execution.ui.SQLTab]
>> [error] Nil
>> [error] )
>> [error] ()
>> [error] )
>> [error] )
>> [error] DefDef( // final def apply(x$13:
>> org.apache.spark.ui.SparkUI): org.apache.spark.sql.execution.ui.SQLTab
>> [error] <method> final
>> [error] "apply"
>> [error] []
>> [error] // 1 parameter list
>> [error] ValDef( // x$13: org.apache.spark.ui.SparkUI
>> [error] <param> <synthetic> <triedcooking>
>> [error] "x$13"
>> [error] <tpt> // tree.tpe=org.apache.spark.ui.SparkUI
>> [error] <empty>
>> [error] )
>> [error] <tpt> // tree.tpe=org.apache.spark.sql.execution.ui.SQLTab
>> [error] Apply( // def <init>(listener:
>> org.apache.spark.sql.execution.ui.SQLListener,sparkUI:
>> org.apache.spark.ui.SparkUI): org.apache.spark.sql.execution.ui.SQLTab
>> in class SQLTab, tree.tpe=org.apache.spark
>> .sql.execution.ui.SQLTab
>> [error] new org.apache.spark.sql.execution.ui.SQLTab."<init>"
>> // def <init>(listener:
>> org.apache.spark.sql.execution.ui.SQLListener,sparkUI:
>> org.apache.spark.ui.SparkUI): org.apache.spark.sql.execution.ui.
>> SQLTab in class SQLTab, tree.tpe=(listener:
>> org.apache.spark.sql.execution.ui.SQLListener, sparkUI:
>> org.apache.spark.ui.SparkUI)org.apache.spark.sql.execution.ui.SQLTab
>> [error] // 2 arguments
>> [error] "listener" // val listener:
>> org.apache.spark.sql.execution.ui.SQLListener,
>> tree.tpe=org.apache.spark.sql.execution.ui.SQLListener
>> [error] "x$13" // x$13: org.apache.spark.ui.SparkUI,
>> tree.tpe=org.apache.spark.ui.SparkUI
>> [error] )
>> [error] )
>> [error] )
>> [error] )
>> [error]
>> [error] == Expanded type of tree ==
>> [error]
>> [error] TypeRef(
>> [error] TypeSymbol(
>> [error] abstract trait Seq[+A] extends PartialFunction[Int,A] with
>> Iterable[A] with GenSeq[A] with GenericTraversableTemplate[A,Seq] with
>> SeqLike[A,Seq[A]]
>> [error]
>> [error] )
>> [error] normalize = PolyType(
>> [error] typeParams = List(TypeParam(+A))
>> [error] resultType = TypeRef(
>> [error] TypeSymbol(
>> [error] abstract trait Seq[+A] extends PartialFunction[Int,A]
>> with Iterable[A] with GenSeq[A] with GenericTraversableTemplate[A,Seq]
>> with SeqLike[A,Seq[A]]
>> [error]
>> [error] )
>> [error] args = List(TypeParamTypeRef(TypeParam(+A)))
>> [error] )
>> [error] )
>> [error] )
>> [error]
>> [error] uncaught exception during compilation:
>> scala.reflect.internal.Types$TypeError
>> scala.reflect.internal.Types$TypeError: bad symbolic reference. A
>> signature in WebUI.class refers to term servlet
>> in value org.jetty which is not available.
>> It may be completely missing from the current classpath, or the version on
>> the classpath might be incompatible with the version used when
>> compiling WebUI.class.
>> at
>> scala.reflect.internal.pickling.UnPickler$Scan.toTypeError(UnPickler.scala:847)
>> at
>> scala.reflect.internal.pickling.UnPickler$Scan$LazyTypeRef.complete(UnPickler.scala:854)
>> at
>> scala.reflect.internal.pickling.UnPickler$Scan$LazyTypeRef.load(UnPickler.scala:863)
>> at
>> scala.reflect.internal.Symbols$Symbol.typeParams(Symbols.scala:1489)
>> at
>> scala.tools.nsc.transform.SpecializeTypes$$anonfun$scala$tools$nsc$transform$SpecializeType
>> ...
>>
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