[C++] SEGV in mapcar() with a CALL_EXPR

[Jeffrey A Law]

  In message < 19990804131959.A4656@them.org >you write:
  > 
  > --J/dobhs11T7y2rNN
  > Content-Type: text/plain; charset=us-ascii
  > 
  > Attached is a testcase for this elusive little segfault on
  > powerpc-*-linux-gnu.  It's exceedingly sensitive - the problem
  > disappeared if I used an absolute -I path instead of a relative one. 
  > And now that I have looked at what is going on, I think I understand
  > why.
You might try updating tree.c from the branch sources.  I recently brought over
a memory management fix from Jim that may (or may not) fix this problem.
jeff