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Bug introduced in 10.0.0 and fixed in 10.0.1

The bug is also present in 12.2.0 and resolved in 12.3.0 on Mac OS X x86 (64-bit).


If I evaluate, with a fresh kernel

Names["Global`*"]

I get

{"rhs", "z"}

I think this is not caused by any packages in $UserBaseDirectory or $BaseDirectory, because if I evaluate the same expression under V9.0.1, which has the same strings for these variables (directories), I get

Names["Global`*"]
{}

As expected.

I was wondering if others are getting the same result. rhs and z do not have values, but still I am a bit concerned about the safety of

Remove["Global`*"]

when certain functions may depend on the existence of these symbols in Global`. For example if I set

sys`f[Global`xxxx_] := Global`xxxx

and evaluate

Remove[Global`xxxx]

then the following looks a bit scary

 sys`f // Definition
sys`f[Removed[xxxx]:_]:=Removed[xxxx]

sys`f still works, but I still think it may lead to trouble (e.g. with Save).

Kirma came up with the nice idea of testing this on the cloud. I get

Apply[And, 
 MemberQ[CloudEvaluate[Names["Global`*"]], #] & /@ {"z", "rhs"}]
True

But there are many other symbols in the Global` context there. So, is this a bug?

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  • 2
    $\begingroup$ On V10 I get {FOO, list, msgs, rhs, z} $\endgroup$
    – mfvonh
    Jul 12, 2014 at 12:06
  • 3
    $\begingroup$ In v.10.0.0 under Win7 x64 I get {"rhs", "z"}. $\endgroup$ Jul 12, 2014 at 12:47
  • 1
    $\begingroup$ I have seen both {list, msgs, rhs, z} and {"rhs", "z"}. Win-7 64. $\endgroup$ Jul 12, 2014 at 18:37
  • 1
    $\begingroup$ @SjoerdC.deVries reported! $\endgroup$ Jul 13, 2014 at 8:44
  • 4
    $\begingroup$ Seems to be solved in V10.0.1 (Win7-64). $\endgroup$ Sep 17, 2014 at 14:33

1 Answer 1

5
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I reported this problem to Wolfram technical support, and I have received the following response (edited for brevity).

I was able to reproduce the issue you have reported. I have forwarded an incident report to our developers with the information you provided.

I have tagged the question with .

Update

This bug appears to be fixed in V10.0.1

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