Whilst we're on the subject of wierd behaviour, can any explain what's going on here? 

perl -e"print join( '|', %{{ }} = (1)x100 );"

[download]

Specifically, where do the undefined values come from?

Update: With the help of those below and some twiddling of my own, I arrived at this. 

P:\test>perl -le"print join'.', %h = (1)x$_ for 1..20;"
1
1.1
1..1
1..1.1
1..1..1
1.1.1..1.1
1..1..1..1
1..1.1.1..1.1
1..1..1..1..1
1.1.1..1.1.1..1.1
1..1..1..1..1..1
1..1.1.1..1.1.1..1.1
1..1..1..1..1..1..1
1.1.1..1.1.1..1.1.1..1.1
1..1..1..1..1..1..1..1
1..1.1.1..1.1.1..1.1.1..1.1
1..1..1..1..1..1..1..1..1
1.1.1..1.1.1..1.1.1..1.1.1..1.1
1..1..1..1..1..1..1..1..1..1
1..1.1.1..1.1.1..1.1.1..1.1.1..1.1

[download]

Which doesn't explain anything, but it removes the ofuscation a little, and clarifies the bizareness.

By now I'm assuming this is a bug, and I'll report it if noone disagree's by later today.

I really can't wait to see the set of circumstances that lead to such a variable set of outputs. The offending piece of code should be immortalizes on a t-shirt, along with the name of which ever clever person tracks it down.

Examine what is said, not who speaks.
"Efficiency is intelligent laziness." -David Dunham
"Think for yourself!" - Abigail
Hooray!

update (broquaint): title change (was Erm?)

In reply to Erm? Bug or not? Weird behaviour in hash / list conversion by BrowserUk

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