Bug in m4 tracing

[Scott Simpson]

M4 version 1.4.3

 

When tracing it turned on, the expansion isn't always shown correctly.
Witness:

 

# m4 --interactive
define(`echo1', `$*')

define(`foo', `This is macro `foo'.')

echo1(foo)
This is macro This is macro foo..
traceon

echo1(foo)
m4trace: -2- foo
m4trace: -1- echo1
This is macro m4trace: -1- foo
This is macro foo..
 

The last expansion "This is macro foo.." should be "This is macro This is
macro foo..".