How to Fix Weird Build Failure with "-release" but OK with "-debug"?

[bauss]

On Wednesday, 21 July 2021 at 03:25:03 UTC, apz28 wrote:
> VisualD project - Any hint to work around
>
> DMD version:
> DMD32 D Compiler v2.096.0-rc.1-dirty
> Copyright (C) 1999-2021 by The D Language Foundation, All 
> Rights Reserved written by Walter Bright
>
> Failed Build Command line:
> dmd -release -m32mscoff -O -inline -dip25 -dip1000 
> -preview=fixAliasThis -X -Xf"Win32\Release\db_library.json" -c 
> -of"Win32\Release\db_library.obj" 
> @Win32\Release\db_library.build.rsp
>
> with below error message:
> ..\..\pham\db\db_skdatabase.d(140): Error: null dereference in 
> function 
> _D4pham2db10fbdatabase7FbArray__T13readArrayImplTbZQsMFNfCQCeQCc8database12DbNameColumnZAb
> ..\..\pham\db\db_skdatabase.d(139): Error: null dereference in 
> function 
> _D4pham2db10fbdatabase7FbArray__T13readArrayImplTbZQsMFNfCQCeQCc8database12DbNameColumnZAb
> Error: null dereference in function 
> _D4pham2db10fbdatabase7FbArray__T13readArrayImplTbZQsMFNfCQCeQCc8database12DbNameColumnZAb
> ..\..\pham\db\db_skdatabase.d(138): Error: null dereference in 
> function 
> _D4pham2db10fbdatabase7FbArray__T13readArrayImplTbZQsMFNfCQCeQCc8database12DbNameColumnZAb

The problem here is not actually -release but -O.

-O will check for null derefences in your code when using @safe I 
believe.

I didn't inspect your code much further, as I'm short on time 
right now, but you should have a starting point now at least.