java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at java.lang.String.(String.java:152)
at git4idea.history.GitLogRecord.shortBuffer(GitLogRecord.java:196)
at git4idea.history.GitLogRecord.lookup(GitLogRecord.java:84)
at git4idea.history.GitLogRecord.getBody(GitLogRecord.java:94)
at git4idea.history.GitLogRecord.getFullMessage(GitLogRecord.java:126)
at git4idea.history.GitHistoryUtils$4.fun(GitHistoryUtils.java:499)
at git4idea.history.GitHistoryUtils$4.fun(GitHistoryUtils.java:494)
at git4idea.history.GitHistoryUtils.readLastCommits(GitHistoryUtils.java:494)
at org.jetbrains.plugins.github.GithubCreatePullRequestWorker$11.convert(GithubCreatePullRequestWorker.java:446)
at org.jetbrains.plugins.github.GithubCreatePullRequestWorker$11.convert(GithubCreatePullRequestWorker.java:439)
at com.intellij.openapi.progress.impl.CoreProgressManager$TaskRunnable.run(CoreProgressManager.java:563)
at com.intellij.openapi.progress.impl.CoreProgressManager$8.run(CoreProgressManager.java:357)
at com.intellij.openapi.progress.impl.CoreProgressManager$2.run(CoreProgressManager.java:142)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:446)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:392)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:54)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:127)
at com.intellij.openapi.application.impl.ApplicationImpl$13$1.run(ApplicationImpl.java:633)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

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