Bug introduced in 10.0 and fixed in 10.1
Why is the variable a ending up assigned to {1,2,3} after executing
Module[{a},
a=Range[3];
ListPlot[a]
]
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4
Michael E2
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Daniel Chess
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4What version are you using? I've tried this on Windows M9 and M10 and don't see the issue. – Andy Ross Nov 19 '14 at 03:23
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I am using Mathematica 10 in OS X Yosemite. – Daniel Chess Nov 19 '14 at 05:38
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I cannot reproduce this in M10.0.1.0 on OS X 10.9.5 – Marius Ladegård Meyer Nov 19 '14 at 06:31
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I can reproduce this on "10.0 for Mac OS X x86 (64-bit) (September 10, 2014)" using OS X Yosemite. Must be a platform-specific bug. You should report it to WRI. – Andy Ross Nov 19 '14 at 14:52
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@MichaelE2 It's not. One more problem caused by the Suggestions Bar. – Szabolcs Feb 17 '15 at 20:37
2 Answers
6
This is yet another bug caused by the Suggestions Bar.
Workaround:
- Go to Preferences... -> Interface, and uncheck "Show Suggestions Bar after last output".
I can reproduce it on OS X, Mathematica 10.0.2, but not in version 9.0.1.
Whenever I see that some people can reproduce a bug, some can't, I turn on the Suggestion Bar and check if it's the culprit. Very often it is. That's why I keep it off.
Szabolcs
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2A-ha! I turned off the Suggestions Bar long ago as soon as I found out that I could. I did not realize it also had such a side effect. Its popping in and out of existence is enough of a headache for me. +1 – Michael E2 Feb 17 '15 at 22:07
0
Very strange!
If you put an "a" after it works as expected:
Module[{a}, a = Range[3];
ListPlot[a]]
a
It also works if you suppress the Module's output (but not ListPlot's):
Module[{a}, a = Range[3];
Print@ListPlot[a]];
Aisamu
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1This is yet another symptom of Sugestions Bar caused trouble. Putting the
aat the end prevents the Suggestions Bar from messing with the previous output. – Szabolcs Feb 17 '15 at 20:38