StringIndexOutOfBoundsException: String index out of range: -1

Caused by: java.lang.StringIndexOutOfBoundsException: String index out of range: -1
        at java.lang.AbstractStringBuilder.charAt(AbstractStringBuilder.java:174) ~[na:1.6.0_30]
        at java.lang.StringBuilder.charAt(StringBuilder.java:55) ~[na:1.6.0_30]
        at com.atlassian.stash.internal.scm.git.config.ConfigOutputHandler$ConfigValueReader.trimWhitespacesToLastQuote(ConfigOutputHandler.java:164) ~[na:na]
        at com.atlassian.stash.internal.scm.git.config.ConfigOutputHandler$ConfigValueReader.readAndDecodeValue(ConfigOutputHandler.java:103) ~[na:na]
        at com.atlassian.stash.internal.scm.git.config.ConfigOutputHandler.processReader(ConfigOutputHandler.java:69) ~[na:na]
        at com.atlassian.stash.io.LineReaderOutputHandler.process(LineReaderOutputHandler.java:26) ~[stash-scm-common-2.7.0.jar:na]
        at com.atlassian.utils.process.PluggableProcessHandler.processOutput(PluggableProcessHandler.java:127) ~[atlassian-processutils-1.5.10.jar:na]
        at com.atlassian.utils.process.ExternalProcessImpl$3.doTask(ExternalProcessImpl.java:330) ~[atlassian-processutils-1.5.10.jar:na]
        at com.atlassian.utils.process.LatchedRunnable.run(LatchedRunnable.java:36) ~[atlassian-processutils-1.5.10.jar:na]
        at com.atlassian.stash.internal.concurrent.StateTransferringExecutor$StateTransferringRunnable.run(StateTransferringExecutor.java:68) ~[stash-platform-2.7.0.jar:na]
        ... 3 common frames omitted