Some glitches (*solved*)

[LCD]

So, I found some glitches again.
1. In Optimisation modes when procedures (e.g. dummy procedures for ASM containers as used in BeepFX) are not called, ZXBC shows a warning that procedures are not used, but exit with exitcode 1 (Error).
2. Assigning part of String variables do not work. Compiler says, Variable is not Array, but in Sinclair BASIC it works. This example changes string "Test188" to "Tezt188".

Code:

10 LET a$="Test188"
20 PRINT a$(3)
30 LET a$(3)="z"
40 PRINT a$

3. This crases the Spectrum when compiled:

Code:

z=CODE(INKEY$)