Booting fails after setting -Dorg.jboss.server.bootstrap.maxThreads=X

All you get is:

$ ./standalone.sh
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JBoss Bootstrap Environment

JBOSS_HOME: /Users/bstansberry/dev/jbossas/bootstrap/jboss-as/build/target/jboss-as-7.1.0.Alpha2-SNAPSHOT

JAVA: /System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Home/bin/java

JAVA_OPTS: -Xms64m -Xmx512m -XX:MaxPermSize=256m -Djava.net.preferIPv4Stack=true -Dorg.jboss.resolver.warning=true -Dsun.rmi.dgc.client.gcInterval=3600000 -Dsun.rmi.dgc.server.gcInterval=3600000 -Djboss.modules.system.pkgs=org.jboss.byteman -Djava.awt.headless=true -Dorg.jboss.server.bootstrap.maxThreads=10

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08:49:11,209 INFO [org.jboss.modules] JBoss Modules version 1.1.0.CR3
08:49:11,736 INFO [org.jboss.msc] JBoss MSC version 1.0.1.GA
08:49:11,806 INFO [org.jboss.as] JBoss AS 7.1.0.Alpha2-SNAPSHOT "Ahoy!" starting
08:49:13,090 ERROR [org.jboss.as.controller] JBAS014611: No handler for add at address [("subsystem" => "logging")]
08:49:13,093 INFO [org.jboss.as] JBoss AS 7.1.0.Alpha2-SNAPSHOT "Ahoy!" started in 2227ms - Started 18 of 19 services (1 services are passive or on-demand)