mORMot Open Source

zen010101

Member

Registered: 2024-06-15

Posts: 72

TSynDictionary GPF error

  dict := TSynDictionary.New<RawUTF8, RawUTF8>(true);
  dict.Capacity := 64;
  dict.free;   

These simple code will cause a GPF error at

VarClearProc(Padding[i].Data)

with i = DIC_KEY.

ab

Administrator

From: France

Registered: 2010-06-21

Posts: 14,742

Website

Re: TSynDictionary GPF error

This is a very weird behavior of the VarClearProc() function of the RTL.
Should be fixed by https://github.com/synopse/mORMot2/commit/63b482bf

I have added the corresponding regression tests.
https://github.com/synopse/mORMot2/commit/27cb3d5e

zen010101

Member

Registered: 2024-06-15

Posts: 72

Re: TSynDictionary GPF error

It works. :-)

ab

Administrator

From: France

Registered: 2010-06-21

Posts: 14,742

Website

Re: TSynDictionary GPF error

In fact, the VarClearProc() behavior was not weird nor buggy: it was expected.
We should not use varUnknown as variant type, unless we actually store a true IInterface/IUnknown within the variant.

I have made a code review to fix this in our units.