I've just tested, renaming my maven repository in a way that wildlfy could not reach it and I've got:
./standalone.sh
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JBoss Bootstrap Environment
JBOSS_HOME: .... /Wildfly/Neutral/wildfly-10.0.0.Alpha3-SNAPSHOT
JAVA: /Library/Java/JavaVirtualMachines/jdk1.8.0_05.jdk/Contents/Home//bin/java
JAVA_OPTS: -server -XX:+UseCompressedOops -server -XX:+UseCompressedOops -Xms64m -Xmx512m -Djava.net.preferIPv4Stack=true -Djboss.modules.system.pkgs=org.jboss.byteman -Djava.awt.headless=true
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Exception in thread "main" org.jboss.modules.ModuleLoadException: Error loading module from /Users/eduardo/Applications/Dev/Servers/Wildfly/Neutral/wildfly-10.0.0.Alpha3-SNAPSHOT/modules/system/layers/base/org/apache/xerces/main/module.xml
at org.jboss.modules.ModuleXmlParser.parseModuleXml(ModuleXmlParser.java:150)
at org.jboss.modules.ModuleXmlParser.parseModuleXml(ModuleXmlParser.java:127)
at org.jboss.modules.LocalModuleFinder$1.run(LocalModuleFinder.java:150)
at org.jboss.modules.LocalModuleFinder$1.run(LocalModuleFinder.java:144)
at java.security.AccessController.doPrivileged(Native Method)
at org.jboss.modules.LocalModuleFinder.findModule(LocalModuleFinder.java:144)
at org.jboss.modules.ModuleLoader.findModule(ModuleLoader.java:452)
at org.jboss.modules.ModuleLoader.loadModuleLocal(ModuleLoader.java:355)
at org.jboss.modules.ModuleLoader.preloadModule(ModuleLoader.java:302)
at org.jboss.modules.Module.addPaths(Module.java:1028)
at org.jboss.modules.Module.link(Module.java:1398)
at org.jboss.modules.Module.relinkIfNecessary(Module.java:1426)
at org.jboss.modules.ModuleLoader.loadModule(ModuleLoader.java:238)
at org.jboss.modules.Main.main(Main.java:384)
Caused by: org.jboss.modules.xml.XmlPullParserException: Failed to resolve artifact 'xerces:xercesImpl:2.11.0.SP3' (position: END_TAG seen ...resources>\n <artifact name="xerces:xercesImpl:2.11.0.SP3"/>... @28:56)
at org.jboss.modules.ModuleXmlParser.parseArtifact(ModuleXmlParser.java:756)
at org.jboss.modules.ModuleXmlParser.parseResources(ModuleXmlParser.java:650)
at org.jboss.modules.ModuleXmlParser.parseModuleContents(ModuleXmlParser.java:446)
at org.jboss.modules.ModuleXmlParser.parseDocument(ModuleXmlParser.java:261)
at org.jboss.modules.ModuleXmlParser.parseModuleXml(ModuleXmlParser.java:148)
... 13 more