CronSequenceGenerator causes StackOverflowError with reversed range values [SPR-14462]

[spring-projects-issues]

Edward opened SPR-14462 and commented

CronSequenceGenerator next(Date date) method causes a StackOverflowError if there is a range value in the 'minutes' or 'hours' fields where the numbers are reversed.

For example :

public static void main(String[] s) {
    new CronSequenceGenerator("* 6-5 * * * *").next(new Date());
    System.out.println("Won't get here cos StackOverflowError");
}

It seems to me it is fixed by adding another check to the getRange(String field, int min, int max) method

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Affects: 3.2.17, 4.2.7, 4.3.1

Issue Links:

• CronSequenceGenerator constructor goes into infinite loop with invalid increments [SPR-12871] #17469 CronSequenceGenerator constructor goes into infinite loop with invalid increments
• CronSequenceGenerator.next() is not implemented as documented [SPR-14589] #19158 CronSequenceGenerator.next() is not implemented as documented

Referenced from: commits da59b4d, 44152ce, 9be5404, e431624

Backported to: 4.2.8, 3.2.18