xemacs version: 21.4.6, both with and without mule
The simplest way to reproduce it is:
load-library edebug;
find Info-visit-file definition;
C-u M-C-x it;
Invoke Info-visit-file.
edebug-1.14 stops in Info-visit-file with arrpropriate display in
info.el buffer. edebug-1.15 displays nothing, but apparently
execution of Info-visit-file breaks without any error message.