[Maxima-bugs] [ maxima-Bugs-859899 ] TIMER and TRACE mutually exclusive

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Bugs item #859899, was opened at 2003-12-14 10:47
Message generated for change (Comment added) made by robert_dodier
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Category: Lisp Core
Group: None
>Status: Closed
>Resolution: Fixed
Priority: 5
Submitted By: Robert Dodier (robert_dodier)
Assigned to: Nobody/Anonymous (nobody)
Summary: TIMER and TRACE mutually exclusive

Initial Comment:
TIMER(FOO) has no effect if TRACE(FOO) is already in
effect. -- if you call UNTRACE(FOO) and then TIMER(FOO)
it works as expected.

TIMER(FOO) after TRACE(FOO) yields "FOO is already
traced" and timing numbers are not collected for FOO.

Likewise TRACE(FOO) has no effect if TIMER(FOO) is
already in effect -- if you call UNTIMER(FOO) and then
TRACE(FOO) it works as expected.

UNTIMER(FOO) turns off TRACE(FOO) and UNTRACE(FOO)
turns off TIMER(FOO).

In mtrace.lisp, $TIMER calls MACSYMA-TIMER, which calls
MACSYMA-TRACE-SUB. From reading the code, I can see
where the "FOO is already traced" message comes from,
but I don't see why TIMER fails to go into effect in
that case.

There's nothing in the available documentation that
suggests TIMER and TRACE are mutually exclusive.

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>Comment By: Robert Dodier (robert_dodier)
Date: 2006-07-18 21:52

Message:
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Documentation for timer and trace now states that the two
are mutually exclusive. That behavior seems fine; when
you're tracing something, it will take longer to execute so
the timer values would be inaccurate anyway. Closing this
report as fixed (because the documentation was updated).

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