[fpc-devel] Data flow analysis (dfa) and "case ... of"

Juha Manninen juha.manninen62 at gmail.com
Mon Jun 5 20:14:29 CEST 2017

On Monday, June 5, 2017, Denis Kozlov <dezlov at gmail.com> wrote:

> I have just created a new GUI application, enabled range checking "-Cr"
> and executed the following:
> ShowMessage(IntToStr(Form1.BorderSpacing.GetSpace(TAnchorKind(-1))));
> The displayed value is a semi-random integer. No compiler errors or
> run-time errors.

The typecast suppresses a range error in your code.
However the LCL method GetSpace should give an error if it is compiled with
So, build Lazarus + LCL with profile "Debug IDE" and try again.

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