2012-12-18
Dave RolskyBetter description of hash assignment bug fixes
Better description of hash assignment bug fixes

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2012-12-18
Dave RolskyClarify hash assignment bug fix in list context
Clarify hash assignment bug fix in list context

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2012-12-11
Father Chrysostomos[Merge] hash assignment fixes and speedup
[Merge] hash assignment fixes and speedup
 ...to left algorithm for not magic hash assignment
>     * in list context hash assignment return keys aliased to RHS

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2012-12-11
Ruslan Zakirovrefactor aassign
for array and hash assignment "while (relem <= SP)" loop

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2012-12-11
Ruslan Zakirovhash assign in list context should copy key as well
hash assign in list context should copy key... 

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2012-12-11
Ruslan Zakirovmake sure hash assignment is proper lvalue
make sure hash assignment is proper lvalue

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2012-12-11
Ruslan Zakirovfix issues in hash assignment with odd elements
fix issues in hash assignment with odd elements
3) hash assignment with duplicates and odd elements on

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2012-12-11
Ruslan Zakirovtest hash assignment with odd elements for leaks
test hash assignment with odd elements for leaks
 ...is tied and dies on fetch then hash assignment

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2012-12-11
Ruslan Zakirovtest "Odd number of elements in hash assignment"
test "Odd number of elements in hash assignment"

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2012-09-23
Father ChrysostomosStop hash assignment from leaking on croak
Stop hash assignment from leaking on croak

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2012-05-22
Lukas Maidocument behavior of duplicate keys in hash assignment
 ...behavior of duplicate keys in hash assignment

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2010-09-11
David Mitchelllist cxt hash assign with dups gives garbage
list cxt hash assign with dups gives garbage

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[download]

Thx, this one looks good! =)

2010-09-11 David Mitchell
list cxt hash assign with dups gives garbage

the others are too new.

Fix for #31865: weird results from reverse( %x = reverse %h )

Basically, anything of the form

@a = %h = (list with some duplicate keys)

may have left @a containing weird and/or freed values.

There was a partial fix for this with ca65944e, but it was broken (it did one big block move on the stack at the end to remove duplicates, but duplicates weren't necessarily all in one block.)

The new fix is a two-stage process. First, while pulling key/value pairs of the stack and assigning them to the hash, each key/val pair is written back to the stack - possibly at a lower position if there are duplicates to be skipped.

Finally at the end if any duplicates have been detected, then in list context, a single pass is made through the stack, and for each key/val pair, the key is looked up and the val on the stack is overwritten with the new value (replacing possibly freed or other garbage values).

Cheers Rolf