default exception handler WAWalkbackErrorHandler only present in development, not runtime
in Seaside (3.2.0 - JohanBrichau.85 1 in the Visualworks 8.3 port) class
WAEnvironment installs WAWalkbackErrorHandler as default
exceptionHandler in method
#configureApplicationExceptionHandlingDefaults called from initialize.
But WAWalkbackErrorHandler is included in package Seaside-Development,
so if you build runtimes without Seaside development packages, this
fails because WAWalkbackErrorHandler is not present in such runtime images.
Shouldn't rather WAHtmlErrorHandler be used as default exception handler
which is in the same package as WAEnvironment? And then maybe replaced
by WAWalkbackErrorHandler if you additionally load development?