compilation error after update to Web Core 2.4.5

Hello,
After updating TMS Web Core to the last version 2.4.5 ,
I have this compilation error (for a project that was compiling just fine on previous version 2.4.0.0 trial)

List index out of bounds (-1). TTMSTokenList range is 0..3443
[Fatal Error] List index out of bounds (-1). TTMSTokenList range is 0..3443

I can't figure out where it's coming from, and can't even just identify the elements that could be involved.

(D12 Architect, Windows 10)

thanks

How can we reproduce this?