Given following log snippets, their explanation, and nothing else, explain what failure, if any, occurred during build of this package.

  Snippets are in a format of [X] : [Y], where [X] is a log snippet, and [Y] is the explanation.

  Snippets are delimited with '================'.

  Drawing on information from all snippets, provide a concise explanation of the issue and recommend a solution.

  Explanation of the issue, and recommended solution, should take a handful of sentences.

  Snippets:

  [error: Bad exit status from /var/tmp/rpm-tmp.IlLPIi (%build)]: [Build step has failed.]
=============
[Copr build error: Build failed]: [Final copr build failure message.]
=============
[[ERROR] Tests run: 8709, Failures: 1, Errors: 2, Skipped: 14]: [One test has failed, while two experienced errors.]
=============
[[ERROR] org.postgresql.core.ParserTest.namedPlaceholderComplex  Time elapsed: 0.005 s  <<< FAILURE!
org.opentest4j.AssertionFailedError: expected: <0> but was: <1>]: [Test assertion was violated.]
=============
[[ERROR] org.postgresql.test.jdbc2.MixedParameterMultiStatementTest.regularMultiStatement  Time elapsed: 0.001 s  <<< ERROR!
java.lang.NullPointerException: Cannot invoke "java.sql.Connection.unwrap(java.lang.Class)" because "this.con" is null]: [Multiple tests have experienced errors. This was caused by 'this.con' being null.]
=============
[
[INFO] -------------------------------------------------------
[INFO]  T E S T S
[INFO] -----------------------------------------------------]: [Test execution disclaimer.]
=============
[WARNING: Unexpected exception while executing onClean
java.lang.RuntimeException: Exception from cleanup action to verify if the cleaner thread would survive
	at org.postgresql.util.LazyCleanerTest.lambda$phantomCleaner$0(LazyCleanerTest.java:55)
	at org.postgresql.util.LazyCleaner$Node.onClean(LazyCleaner.java:219)
	at org.postgresql.util.LazyCleaner$1.run(LazyCleaner.java:137)
	at java.base/java.lang.Thread.run(Thread.java:840)]: [Unexpected exception was encountered while executing `onClean`. The exception was encountered in java code. ]

Issue: Multiple tests have either failed or experienced exceptions.
Resolution: Ensure that all tests can execute successfully and without errors. 