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d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=10380

           Summary: Wrong code using associative array as key type in
                    associative array
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Keywords: wrong-code
          Severity: critical
          Priority: P2
         Component: druntime
        AssignedTo: nobody puremagic.com
        ReportedBy: verylonglogin.reg gmail.com



18:10:44 MSD ---
`TypeInfo_AssociativeArray` don't override `equals` and `compare` so one get
mess if an associative array is used as a key type in an associative array.
E.g. `keyti.compare` in `_aaEqual` calls `TypeInfo`'s `compare` which always
return `0`.

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18:57:46 MSD ---
Override `equals` in `TypeInfo_AssociativeArray`:
https://github.com/D-Programming-Language/druntime/pull/523

Currently there is no comparison functions for AA-s, see Issue 10381.

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Commit pushed to master at https://github.com/D-Programming-Language/druntime

https://github.com/D-Programming-Language/druntime/commit/1c6603e9c0f6081d12fa1cd898bc77db7769914a
Override `equals` in `TypeInfo_AssociativeArray`.

Fixes part of Issue 10380.

Issue URL: http://d.puremagic.com/issues/show_bug.cgi?id=10380

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d-bugmail puremagic.com writes:

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Do you have any failing unittest for this bug? I can't seem to reproduce the
problem in git HEAD.

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10:49:34 MSD ---

 Do you have any failing unittest for this bug? I can't seem to reproduce the
 problem in git HEAD.

It's hard to create unittests as the problem will appear iff we will have to
unequal AA-s with equal hashes.

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I have a fix for this, but I need to somehow make a unittest to verify that it
actually fixes the problem. Maybe we can somehow craft a unittest using
typeid(aa).compare?

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https://github.com/D-Programming-Language/druntime/pull/544

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I figured out a way to test for broken .compare: make an AA key type that
overrides both opEquals and opCmp, and deliberately have wrong implementation
for opCmp.

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Hi Denis,

Can you check this bug again? Recently Kenji & I made some fixes in this area,
and this may be fixed now. Could you verify?

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18:24:07 MSD ---

 Hi Denis,
 
 Can you check this bug again? Recently Kenji & I made some fixes in this area,
 and this may be fixed now. Could you verify?

Currently `equals` is overriden in `TypeInfo_AssociativeArray` as druntime pull
523 is merged. But it doesn't changes this issue situation as `equals` isn't
used. The issue will be fixed if e.g. this pull will be merged:
https://github.com/D-Programming-Language/druntime/pull/522

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