fix: crash when using -(bool expression)

src/api/constants.py

@@ -148,7 +148,7 @@ def to_signed(cls, type_: "TYPE") -> "TYPE":
         """Return signed type or equivalent"""
         if type_ in cls.unsigned:
             return {
-                TYPE.boolean: TYPE.boolean,
+                TYPE.boolean: TYPE.byte,
                 TYPE.ubyte: TYPE.byte,
                 TYPE.uinteger: TYPE.integer,
                 TYPE.ulong: TYPE.long,

src/arch/z80/peephole/opts/013_o1_neg_neg.opt

@@ -0,0 +1,16 @@
+;; Replaces sequence:
+;;  neg
+;;  neg
+;; with
+;;  ; nop  ;; double neg can be removed
+
+OLEVEL: 1
+OFLAG: 13
+
+REPLACE {{
+  neg
+  neg
+}}
+
+WITH {{
+}}

tests/functional/arch/zx48k/let_uminus_bool.asm

@@ -0,0 +1,46 @@
+	org 32768
+.core.__START_PROGRAM:
+	di
+	push ix
+	push iy
+	exx
+	push hl
+	exx
+	ld hl, 0
+	add hl, sp
+	ld (.core.__CALL_BACK__), hl
+	ei
+	jp .core.__MAIN_PROGRAM__
+.core.__CALL_BACK__:
+	DEFW 0
+.core.ZXBASIC_USER_DATA:
+	; Defines USER DATA Length in bytes
+.core.ZXBASIC_USER_DATA_LEN EQU .core.ZXBASIC_USER_DATA_END - .core.ZXBASIC_USER_DATA
+	.core.__LABEL__.ZXBASIC_USER_DATA_LEN EQU .core.ZXBASIC_USER_DATA_LEN
+	.core.__LABEL__.ZXBASIC_USER_DATA EQU .core.ZXBASIC_USER_DATA
+_a:
+	DEFB 00
+.core.ZXBASIC_USER_DATA_END:
+.core.__MAIN_PROGRAM__:
+	ld hl, (_a - 1)
+	ld a, (_a)
+	sub h
+	sub 1
+	sbc a, a
+	ld (_a), a
+	ld hl, 0
+	ld b, h
+	ld c, l
+.core.__END_PROGRAM:
+	di
+	ld hl, (.core.__CALL_BACK__)
+	ld sp, hl
+	exx
+	pop hl
+	exx
+	pop iy
+	pop ix
+	ei
+	ret
+	;; --- end of user code ---
+	END

tests/functional/arch/zx48k/let_uminus_bool.bas

@@ -0,0 +1,4 @@
+DIM a As Ubyte
+
+LET a = -(a = a)
+