Erroneous Set datatype behavior

[rodabt]

Describe the bug

Two identical Set[string]{} x and y give different results when y - x after x - y

Reproduction Steps

// V 0.4.5 2baa11b
import datatypes { Set }

fn main() {
    m := ['a','b','c']
    n := ['a','b','c']
    assert m == n
    mut set_m := Set[string]{}
    mut set_n := Set[string]{}
    set_m.add_all(m)
    set_n.add_all(n)
    assert set_m == set_n
    diff1 := set_m - set_n
    diff2 := set_n - set_m
    println(diff1)
    println(diff2)
    // Should be identical...but not
    assert diff1 == diff2
}

Expected Behavior

assert diff1 == diff2 should be true

Current Behavior

Throws error in assert

datatypes.Set[string]{
    elements: {}
}
datatypes.Set[string]{
    elements: {'a': 1, 'b': 1, 'c': 1}
}
tmp3.v:21: FAIL: fn main.main: assert diff1 == diff2
   left value: diff1 = datatypes.Set[string]{
    elements: {}
}
  right value: diff2 = datatypes.Set[string]{
    elements: {'a': 1, 'b': 1, 'c': 1}
}
V panic: Assertion failed...
v hash: 2baa11b
/tmp/v_1000/tmp3.01HVW16R04A9R3CBS3NG9H8D1N.tmp.c:7202: at _v_panic: Backtrace
/tmp/v_1000/tmp3.01HVW16R04A9R3CBS3NG9H8D1N.tmp.c:13607: by main__main
/tmp/v_1000/tmp3.01HVW16R04A9R3CBS3NG9H8D1N.tmp.c:13648: by main

Possible Solution

No response

Additional Information/Context

No response

V version

V 0.4.5 2baa11b

Environment details (OS name and version, etc.)

V full version: V 0.4.5 2baa11b
OS: linux, Debian GNU/Linux 11 (bullseye) (WSL 2)
Processor: 8 cpus, 64bit, little endian, Intel(R) Core(TM) i7-10510U CPU @ 1.80GHz

getwd: /home/rabt/devel/prisma2/OLD/tmp
vexe: /home/rabt/devel/v/v
vexe mtime: 2024-04-19 20:34:45

vroot: OK, value: /home/rabt/devel/v
VMODULES: OK, value: /home/rabt/.vmodules
VTMP: OK, value: /tmp/v_1000

Git version: git version 2.30.2
Git vroot status: 0.4.5-203-g2baa11b3
.git/config present: true

CC version: cc (Debian 10.2.1-6) 10.2.1 20210110
thirdparty/tcc status: thirdparty-linux-amd64 40e5cbb5

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