The trap mechanism in Mumps has similarities to the exception mechanism in many other language. Most examples I have seen of trap usage is for catching unintent
luminance
http-conduit
emacs24
openjdk-12
powerapps-makerportal
dll
google-app-maker
fantomas
jdom
svg.js
google-cloud-network-load-balancer
eclipse-mars
oomph
shared-ptr
glpk
avl-tree
adobe-scriptui
safe-navigation-operator
segue
faces-config
snakecasing
data-gateway
informatica-data-integration-hub
urlacl
google-logging
actian
entityresolver
civicrm
qhull
tuckey-urlrewrite-filter