I am unable to use versioning for a custom tool. It seems that the Custom Tools plugin is not compatible with the latest version of the Extended Choice Parameter plugin.

```
javax.servlet.ServletException: java.lang.IllegalArgumentException: Failed to instantiate class com.cloudbees.jenkins.plugins.customtools.CustomTool from {"name":"phpenv","exportedPaths":"phpenv/bin,phpenv/shims","home":"","additionalVariables":"","toolVersion":{"versionsListSource":{"name":"PHP_VERSION","description":"The PHP version to use.","parameterGroup":{"value":"0","type":"PT_SINGLE_SELECT","visibleItemCount":"5","multiSelectDelimiter":",","quoteValue":false,"propertySource":

{"value":"0","propertyValue":"5.3.29"}

,"defaultPropertySource":{"value":"0","defaultPropertyValue":"5.3.29"}}}},"properties":{"stapler-class-bag":"true","hudson-tools-InstallSourceProperty":{"installers":{"label":"","command":"export PHPENV_ROOT=$(pwd)/phpenv\nexport PATH=\"$PATH:$(pwd)/phpenv/bin\"\n\nif test -d $PHPENV_ROOT; then\n $PHPENV_ROOT/bin/phpenv update\nelse\n (curl -L http://git.io/phpenv-installer | bash)\nfi\n\nif ! test -d $PHPENV_ROOT/shims; then\n mkdir $PHPENV_ROOT/shims\nfi","toolHome":".","stapler-class":"hudson.tools.CommandInstaller","$class":"hudson.tools.CommandInstaller"}}}}
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:796)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:876)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:649)
at org.kohsuke.stapler.Stapler.service(Stapler.java:238)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:686)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1494)
at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:132)
at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:123)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482)
at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:49)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)
at hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:51)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
at jenkins.security.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:117)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
at org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
at org.acegisecurity.ui.rememberme.RememberMeProcessingFilter.doFilter(RememberMeProcessingFilter.java:142)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
at jenkins.security.BasicHeaderProcessor.doFilter(BasicHeaderProcessor.java:93)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)
at hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:67)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:76)
at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:171)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482)
at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:49)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482)
at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:81)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1482)
at org.kohsuke.stapler.DiagnosticThreadNameFilter.doFilter(DiagnosticThreadNameFilter.java:30)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1474)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:499)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:533)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:428)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
at org.eclipse.jetty.server.Server.handle(Server.java:370)
at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:489)
at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:960)
at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:1021)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:865)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:240)
at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:668)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52)
at winstone.BoundedExecutorService$1.run(BoundedExecutorService.java:77)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalArgumentException: Failed to instantiate class com.cloudbees.jenkins.plugins.customtools.CustomTool from {"name":"phpenv","exportedPaths":"phpenv/bin,phpenv/shims","home":"","additionalVariables":"","toolVersion":{"versionsListSource":{"name":"PHP_VERSION","description":"The PHP version to use.","parameterGroup":{"value":"0","type":"PT_SINGLE_SELECT","visibleItemCount":"5","multiSelectDelimiter":",","quoteValue":false,"propertySource":

{"value":"0","propertyValue":"5.3.29"}

,"defaultPropertySource":{"value":"0","defaultPropertyValue":"5.3.29"}}}},"properties":{"stapler-class-bag":"true","hudson-tools-InstallSourceProperty":{"installers":{"label":"","command":"export PHPENV_ROOT=$(pwd)/phpenv\nexport PATH=\"$PATH:$(pwd)/phpenv/bin\"\n\nif test -d $PHPENV_ROOT; then\n $PHPENV_ROOT/bin/phpenv update\nelse\n (curl -L http://git.io/phpenv-installer | bash)\nfi\n\nif ! test -d $PHPENV_ROOT/shims; then\n mkdir $PHPENV_ROOT/shims\nfi","toolHome":".","stapler-class":"hudson.tools.CommandInstaller","$class":"hudson.tools.CommandInstaller"}}}}
at org.kohsuke.stapler.RequestImpl$TypePair.convertJSON(RequestImpl.java:602)
at org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:404)
at org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:400)
at org.kohsuke.stapler.RequestImpl.bindJSONToList(RequestImpl.java:441)
at hudson.tools.ToolDescriptor.configure(ToolDescriptor.java:120)
at jenkins.model.Jenkins.configureDescriptor(Jenkins.java:2965)
at jenkins.model.Jenkins.doConfigSubmit(Jenkins.java:2928)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:298)
at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:161)
at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:96)
at org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:121)
at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:746)
... 59 more
Caused by: java.lang.IllegalArgumentException: Failed to convert the toolVersion parameter of the constructor public com.cloudbees.jenkins.plugins.customtools.CustomTool(java.lang.String,java.lang.String,java.util.List,java.lang.String,com.synopsys.arc.jenkinsci.plugins.customtools.LabelSpecifics[],com.synopsys.arc.jenkinsci.plugins.customtools.versions.ToolVersionConfig,java.lang.String)
at org.kohsuke.stapler.RequestImpl.instantiate(RequestImpl.java:699)
at org.kohsuke.stapler.RequestImpl.access$200(RequestImpl.java:81)
at org.kohsuke.stapler.RequestImpl$TypePair.convertJSON(RequestImpl.java:600)
... 75 more
Caused by: java.lang.IllegalArgumentException: Failed to instantiate class com.synopsys.arc.jenkinsci.plugins.customtools.versions.ToolVersionConfig from {"versionsListSource":{"name":"PHP_VERSION","description":"The PHP version to use.","parameterGroup":{"value":"0","type":"PT_SINGLE_SELECT","visibleItemCount":"5","multiSelectDelimiter":",","quoteValue":false,"propertySource":

{"value":"0","propertyValue":"5.3.29"}

,"defaultPropertySource":{"value":"0","defaultPropertyValue":"5.3.29"}}}}
at org.kohsuke.stapler.RequestImpl$TypePair.convertJSON(RequestImpl.java:602)
at org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:404)
at org.kohsuke.stapler.RequestImpl.instantiate(RequestImpl.java:697)
... 77 more
Caused by: java.lang.IllegalArgumentException: Failed to convert the versionsListSource parameter of the constructor public com.synopsys.arc.jenkinsci.plugins.customtools.versions.ToolVersionConfig(com.cwctravel.hudson.plugins.extended_choice_parameter.ExtendedChoiceParameterDefinition)
at org.kohsuke.stapler.RequestImpl.instantiate(RequestImpl.java:699)
at org.kohsuke.stapler.RequestImpl.access$200(RequestImpl.java:81)
at org.kohsuke.stapler.RequestImpl$TypePair.convertJSON(RequestImpl.java:600)
... 79 more
Caused by: java.lang.IllegalArgumentException: Failed to instantiate class com.cwctravel.hudson.plugins.extended_choice_parameter.ExtendedChoiceParameterDefinition from {"name":"PHP_VERSION","description":"The PHP version to use.","parameterGroup":{"value":"0","type":"PT_SINGLE_SELECT","visibleItemCount":"5","multiSelectDelimiter":",","quoteValue":false,"propertySource":

{"value":"0","propertyValue":"5.3.29"}

,"defaultPropertySource":

{"value":"0","defaultPropertyValue":"5.3.29"}

}}
at org.kohsuke.stapler.RequestImpl$TypePair.convertJSON(RequestImpl.java:602)
at org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:404)
at org.kohsuke.stapler.RequestImpl.instantiate(RequestImpl.java:697)
... 81 more
Caused by: org.kohsuke.stapler.NoStaplerConstructorException: There's no @DataBoundConstructor on any constructor of class com.cwctravel.hudson.plugins.extended_choice_parameter.ExtendedChoiceParameterDefinition
at org.kohsuke.stapler.ClassDescriptor.loadConstructorParamNames(ClassDescriptor.java:177)
at org.kohsuke.stapler.RequestImpl.instantiate(RequestImpl.java:684)
at org.kohsuke.stapler.RequestImpl.access$200(RequestImpl.java:81)
at org.kohsuke.stapler.RequestImpl$TypePair.convertJSON(RequestImpl.java:600)
... 83 more
```