Regression test: link-fail problem?

From: Beman Dawes (bdawes_at_[hidden])
Date: 2002-07-08 19:38:54

In trying to track down some of the broken "Fail" links in 
http://www.esva.net/~beman/jam_regr.html, I realized that 
class_concept_fail_expected.cpp is a "link-fail" test, so it isn't 
surprising that there is nothing in the log file. After all, there is an 
up-to-date .exe file. Of course, on a link-fail test, that isn't good 
news. I'll deal with the problem by adding some boilerplate text that says 
on a link-fail test which fails, there aren't any messages to inspect 
because everything worked (even though it shouldn't have.)

But in tracking that down, I spotted a more serious problem: 
concept_check_fail_expected.cpp (which is also "link-fail") is reported as 
succeeding (there is a .success file) even though the code failed to 
compile!

The compile failure causes the test to be reported as a success (because, 
after all, failure was expected). In other words, testing.jam should be 
smart enough to figure out that a compile failure doesn't represent success 
on a "link-fail" test.

We need to do something about this one, since it is causing an incorrect 
"Pass" to be reported.

--Beman