Unexpected "unreachable year segment: 2024" error for valid cron expression in PrevTickBefore

[steffenbusch]

Issue Summary:
When using the PrevTickBefore function with a specific cron expression and a reference time within the same year, the function unexpectedly returns an "unreachable year segment" error. This occurs even when the year in the cron expression matches the reference time year.

Expected Behavior:
Given the cron expression "30 15 4 11 * 2024", which schedules a job for November 4, 2024, at 15:30, and a reference time of November 8, 2024, at 22:18:16 UTC, calling PrevTickBefore should return the previous tick of November 4, 2024, at 15:30:00 UTC without any errors.

Actual Behavior:
The function returns an error indicating "unreachable year segment: 2024".

Test Case:
Here is a minimal test case that reproduces the issue:

package main

import (
    "fmt"
    "time"

    "github.com/adhocore/gronx"
)

func TestIsUnreachableYear_CurrentYear() {
    // Set reference time ("now") to November 8, 2024, at 22:18:16 UTC
    now := time.Date(2024, time.November, 8, 22, 18, 16, 0, time.UTC)

    // Cron expression for 15:30 on November 4, 2024
    cronExpr := "30 15 4 11 * 2024"

    // Expected outcome: November 4, 2024, at 15:30
    expectedTime := time.Date(2024, time.November, 4, 15, 30, 0, 0, time.UTC)

    // Call PrevTickBefore
    actualTime, err := gronx.PrevTickBefore(cronExpr, now, true)

    // Simplified check for error and time
    if err != nil {
        fmt.Printf("Test FAILED: Did not expect an error, but got: %s\n", err)
    } else if !actualTime.Equal(expectedTime) {
        fmt.Printf("Test FAILED: Expected previous tick to be %v, but got %v.\n", expectedTime, actualTime)
    } else {
        fmt.Println("Test PASSED: Year segment 2024 is reachable, and PrevTickBefore returned the correct previous tick.")
    }
}

func main() {
    TestIsUnreachableYear_CurrentYear()
}

Steps to Reproduce:

1. Use the above test case, which calls PrevTickBefore with a reference time (now) in November 2024 and a cron expression for November 4, 2024, at 15:30.
2. Observe that the function returns an "unreachable year segment" error instead of providing the expected previous tick time.

[adhocore]

while it's yet to see for all edge cases, a fix has been released as v1.19.4