I am trying to write a matrix library. Here is the code so far: <div class="snippe

Memory corruption about carp HOT 5 CLOSED

carp-lang commented on May 12, 2024

Memory corruption

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Comments (5)

eriksvedang commented on May 12, 2024

Thanks, I think I've found the problem in the emitted C code. It's a double free inside Matrix_init, for some reason it calls Array_delete__double(data); once for the let scope and once for the function scope. I'll investigate more...

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eriksvedang commented on May 12, 2024

A way of working around the bug until I've solved it is to rewrite Matrix.init in this way:

(defn init [r c data]
    (let [zz 0.0]
      (if (Int.= (* r c) (Array.count &data))
        (MatrixFlat.init r c (VectorN.VN.init (* r c) data))
        (MatrixFlat.init r c (VectorN.VN.init (Int.* r c) (Array.replicate (Int.* r c) &zz))))))

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eriksvedang commented on May 12, 2024

(There seems to be a bug with the let scope inside the if.)

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eriksvedang commented on May 12, 2024

I've pushed a fix for this now, please confirm that it works for you too!

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commented on May 12, 2024

Dear Erik, I can confirm that I now get the expected output. Thank you for your quick response. I did: $ stack clean $ git pull $ stack build $ stack install Best Regards, Alexander Am 21. Dezember 2017 15:40:24 MEZ schrieb "Erik Svedäng" <[email protected]>:

…

I've pushed a fix for this now, please confirm that it works for you too!

-- Diese Nachricht wurde von meinem Android-Mobiltelefon mit K-9 Mail gesendet.

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