Suspected bug with override (appending) to a variable already set in the environmnet

[Elms, Andrew]

Hi,
I think I have detected a bug.  The minimum Makefile needed to reproduce
it is attached along with the core dump and my config.h.  I am running make
version 3.79.1, on a Sun Ultra 60 running SunOS Release 5.8 (Solaris).  Here
are the commands to reproduce the core dump.

I did not see anything specific in the documentation saying not to append
to variables set in the environment BUT may have missed it in the documentation.
  Sorry if I did....


wcars1ct:test:116 : unsetenv MESSAGE
wcars1ct:test:117 : make test
appended text
wcars1ct:test:118 : make test MESSAGE='command line text'
command line text appended text
wcars1ct:test:119 : setenv MESSAGE "environment text"
wcars1ct:test:120 : echo $MESSAGE
environment text
wcars1ct:test:121 :  make test
expand.c:489: failed assertion `current_variable_set_list->next != 0'
Abort (core dumped)
wcars1ct:test:122 :

--
Regards,
Andrew Elms

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bug.tar.gz
Description: application/gzip