C:\> pnuts -d
Copyright (c) 1997-1999 Sun Microsystems, Inc. All rights reserved.
Pnuts interpreter Version 1.0, 1.2.2 (Sun Microsystems Inc.)
> 1
# Stopped at ?:1
 >>> 1
debug>

C:\> pnuts -d:trace.dbg -e 'getProperty("java.version")'
reading /tmp/trace.dbg
# Stopped at ?:1
 >>> getProperty("java.version")
debug> trace
on
debug> cont
jar:file:/usr/local/pnuts/modules/pnuts-modules.jar!/pnuts/util/property.pnut:1 >>> import("java.lang.System")
jar:file:/usr/local/pnuts/modules/pnuts-modules.jar!/pnuts/util/property.pnut:2 >>> import("java.util.Properties")
jar:file:/usr/local/pnuts/modules/pnuts-modules.jar!/pnuts/util/property.pnut:3 >>> import("java.io.InputStream")
jar:file:/usr/local/pnuts/modules/pnuts-modules.jar!/pnuts/util/property.pnut:4 >>> import("java.io.File")
jar:file:/usr/local/pnuts/modules/pnuts-modules.jar!/pnuts/util/property.pnut:5 >>> import("java.io.FileInputStream")
jar:file:/usr/local/pnuts/modules/pnuts-modules.jar!/pnuts/util/property.pnut:7 >>> function setProperty(name, val) {
 prop = System::getProperties()
 if (val == null) {
  prop.remove(name)
 } else {
  prop.put(name, val)
 }
}
jar:file:/usr/local/pnuts/modules/pnuts-modules.jar!/pnuts/util/property.pnut:16 >>> function getProperty(name) {
 System::getProperty(name)
}
jar:file:/usr/local/pnuts/modules/pnuts-modules.jar!/pnuts/util/property.pnut:20 >>> function loadProperties(resourceOrStream) {
 loadProperties(resourceOrStream, Properties())
}
jar:file:/usr/local/pnuts/modules/pnuts-modules.jar!/pnuts/util/property.pnut:24 >>> function loadProperties(input, prop) {
 if (input instanceof String) {
  url = getResource(input)
  if (url == null) {
   return null
  }
  prop.load(openURL(url))
 } else if (input instanceof File) {
  prop.load(fd = open(input))
  fd.close()
 } else if (input instanceof InputStream) {
  prop.load(input)
 } else {
  throw(IllegalArgumentException(string(input)))
 }
 prop
}
jar:file:/usr/local/pnuts/modules/pnuts-modules.jar!/pnuts/util/property.pnut:16 >>> {
 System::getProperty(name)
}
jar:file:/usr/local/pnuts/modules/pnuts-modules.jar!/pnuts/util/property.pnut:17 >>> System::getProperty(name)
# Returns "1.4.2"

trace
cont