stringLiteral parser of JavaTokenParsers ends up with a Stackoverflow error since scala upgrade

reproduction steps

using Scala 2.12 or 2.13

object Main {

  def main(args: Array[String]): Unit = {

    val RegScala213 = ("\""+"""([^"\x00-\x1F\x7F\\]|\\[\\'"bfnrt]|\\u[a-fA-F0-9]{4})*"""+"\"").r // Scala 2.13

    //val RegScala211 = ("\""+"""([^"\p{Cntrl}\\]|\\[\\'"bfnrt]|\\u[a-fA-F0-9]{4})*+"""+"\"").r // Scala 2.11

    val query = """"https://www.mywebsite.com/house/c/horses/302?warehouses=7fe2f2dd-c1ea-4661-acf6-e55fa1d9368a%2C72f2d9f8-d659-4f14-bb52-26d84f6979aa%2C17f49ed9-204a-42b3-8bf9-fc84e9829881%2C5dbe9433-2093-4112-a21b-4c7bcb718e3e%2C6e998dbb-3de7-4215-a7b9-859b8548993d%2Ce7e3e675-f6e0-475f-892a-f4386eef7d28%2Cf06146f4-7405-4c05-a6d9-83cebbd09951%2Cf9d770c9-a575-4020-b2ba-e9c4c4db47c7%2C36386fef-3abf-483b-a74d-b0de2974cea3%2C92707102-f711-46e3-a071-212c18f00ef3%2C44703d29-3dec-4bfd-b4ee-babdf3803348%2C96f9d86f-e487-44cd-9ae4-eb15518950ec%2C05edda44-e4ef-44ea-9838-71633643373a%2Cd70690e4-c35f-4647-9610-7d2b83fbac49%2C6b8afc90-f2a1-41f5-9532-2d6ab4d71b62%2C0626f9b9-b7e4-422c-9093-c3ae416053da%2C3e8a8728-f984-4b6a-a72a-4d354ed685b9%2C83101da9-5033-4bc6-bafb-23de37ba7fc8%2Cf8fe11a3-f1dd-44bd-8ed5-26850b1b85a6%2C314561b7-4c79-4a2c-84dd-c6b992a72c60%2Ca5094218-73f3-41bf-898a-f754afebf5fb%2Cf9ceaba7-5b53-41df-b6d4-649052b02474%2C1a8f1a4c-0598-427e-af75-2cf6cc3d23d1%2C192e0835-a51f-4618-b05c-840b50e3ccc9%2C641c6ab1-e2c0-4741-b694-d9b69a62e1d3%2Cddeaa4c6-463f-422f-bb57-e63c569dcfe6%2C93e970cf-d3c3-458d-9733-77d76dadf45b%2C694d6700-393b-438a-9f65-f4560e5f8fc8%2C6ca55c3d-3600-4d24-ac1c-5e3e1dee13fe%2Cd1e631aa-5ffc-4bd8-8032-d8bbb7e37139%2C5902c655-d859-4b84-a1d3-32c7532ea05c%2C53a635df-0ab0-48ff-baa2-970f0e3a5894%2Cfdc858c0-3436-4717-a04c-49f43692ebaa%2Cb3e8d8c0-abba-4ae2-8297-0200076fe01e%2C16c4d84b-7e44-4cac-ae90-e4a807be480b%2Ca629e7a1-e7b7-4dd8-86b2-578ec3f67bef%2Cc2f15ee4-f768-42fd-84d7-8fe03bc2e850%2C913e78ee-b019-49c6-9cdd-b0c708135c10%2C92f5b8c7-f458-4d3d-941f-453110cad138%2Cb22f1cad-2242-44a5-a97d-8094f4149e5f%2Cc2164749-f6f0-4f64-92ae-f59dd2aa29e5%2C722f2065-f32e-43a3-b706-d790d727a969%2C06e98486-1c4d-4cb4-9e70-d0ccaf40f571%2C8da3be85-4bfc-40e0-898e-cd87932801c7%2C4558f17f-1f67-49ee-9a4d-6a8ee6a18d23%2C0aa5a074-60dd-4cad-a30b-ba2c8f67f6f4%2C90baddd2-4ca2-49a1-bd4f-6845d3784574%2C87049a4e-ca40-414d-80f2-f6c566d62cd2%2C8b2b73b6-c727-4812-8cc4-12efd8f44a30%2C2c5d9b5e-6a90-489d-9306-dd2519a53da4%2C2ecbb252-71e7-4cc7-9096-d8149596ce45%2Cc27cee97-f090-4145-b8db-8bbdde30b779%2Cd4489788-33eb-4da0-9ded-2a764deb6048%2C89c0d271-4d70-43a6-8929-594b2298401d%2C0fe8b049-1e1d-4aff-be7a-7acdef611922%2Cbcc68252-e898-49f9-ac92-4d0e2f32af42%2Cc98e1b16-ed87-40ab-8b8c-86537b62b9f5%2C9296f4ea-81ed-49da-aa4f-59bbffa0848d%2C9343c619-5688-4e68-a9bb-0a1c3a84a188%2C9dd47b8a-6e75-4de3-aec3-b26cd5107cfc%2C8033b59e-23ef-4903-8bb6-0e6124aabff9%2Cca05fc7d-e5c5-42a6-b4b0-4f4bee81f517%2Cedf7dcfd-95d2-4af8-af58-a1c7c04d19f0%2C920720e5-0938-4f20-a2ba-8336dce283ab%2C13a9252b-a946-479e-ae6e-a80bc1d36d89%2Cf106f107-3f5c-4f09-992d-a4f8c754ad59%2C19de97a3-f55e-4aa8-9dfd-92be2a3366b3%2Ce28fb8a9-f362-4c3a-b3ae-b65acc2aed70%2C1f48c19a-4746-475d-a16d-3a4e8ca678a8%2C6dec5d60-e3ab-46d2-af77-04899d3d4ba7%2Cd34d11ba-5bcc-4958-8902-a2809d4841bd%2C13c76c21-64b9-4aea-917b-2b6fe93f832a%2C53a8c21c-7f10-40fc-9bfb-a7031747ba77%2C604a764a-9916-4006-b4c7-6cdd8d11de98%2C8c62146e-db90-4b4b-bb76-80b53500152f%2Cb3232b20-487e-4364-b829-8adb45463ad0%2C47b5438b-b883-4491-8a0c-664c577c0b2a%2C791341e5-67bb-4f60-98f9-1be7e161d28b%2Cbe28b8ce-d90d-4248-9da2-fee319d68641%2C3e8d191c-6226-4dcb-ac9b-ca6693b42c3d%2Cbd576b40-5b69-4d7c-b093-bfa69b90cc0d%2Ca3631cba-abe9-4394-b1e5-9291feb371df&cursor=WyIyMDIxLTA0LTA4IDA1OjU2OjE3LjA4MjUyNyswMDowMCIsICJDdWUgV29tZW5zIFNpemUgMTAgU2hpcnRzICYgQmxvdXNlcyBNYXJvb24vU3RyaXBlZCAiLCAiY3VlLXdvbWVucy1zaXplLTEwLXNoaXJ0cy1ibG91c2VzLW1hcm9vbnN0cmlwZWQiXQ%3D%3D","https://www.salvosstores.com.au/shop/c/womens/302?warehouses=7fe2f2dd-c1ea-4661-acf6-e55fa1d9368a%2C72f2d9f8-d659-4f14-bb52-26d84f6979aa%2C17f49ed9-204a-42b3-8bf9-fc84e9829881%2C5dbe9433-2093-4112-a21b-4c7bcb718e3e%2C6e998dbb-3de7-4215-a7b9-859b8548993d%2Ce7e3e675-f6e0-475f-892a-f4386eef7d28%2Cf06146f4-7405-4c05-a6d9-83cebbd09951%2Cf9d770c9-a575-4020-b2ba-e9c4c4db47c7%2C36386fef-3abf-483b-a74d-b0de2974cea3%2C92707102-f711-46e3-a071-212c18f00ef3%2C44703d29-3dec-4bfd-b4ee-babdf3803348%2C96f9d86f-e487-44cd-9ae4-eb15518950ec%2C05edda44-e4ef-44ea-9838-71633643373a%2Cd70690e4-c35f-4647-9610-7d2b83fbac49%2C6b8afc90-f2a1-41f5-9532-2d6ab4d71b62%2C0626f9b9-b7e4-422c-9093-c3ae416053da%2C3e8a8728-f984-4b6a-a72a-4d354ed685b9%2C83101da9-5033-4bc6-bafb-23de37ba7fc8%2Cf8fe11a3-f1dd-44bd-8ed5-26850b1b85a6%2C314561b7-4c79-4a2c-84dd-c6b992a72c60%2Ca5094218-73f3-41bf-898a-f754afebf5fb%2Cf9ceaba7-5b53-41df-b6d4-649052b02474%2C1a8f1a4c-0598-427e-af75-2cf6cc3d23d1%2C192e0835-a51f-4618-b05c-840b50e3ccc9%2C641c6ab1-e2c0-4741-b694-d9b69a62e1d3%2Cddeaa4c6-463f-422f-bb57-e63c569dcfe6%2C93e970cf-d3c3-458d-9733-77d76dadf45b%2C694d6700-393b-438a-9f65-f4560e5f8fc8%2C6ca55c3d-3600-4d24-ac1c-5e3e1dee13fe%2Cd1e631aa-5ffc-4bd8-8032-d8bbb7e37139%2C5902c655-d859-4b84-a1d3-32c7532ea05c%2C53a635df-0ab0-48ff-baa2-970f0e3a5894%2Cfdc858c0-3436-4717-a04c-49f43692ebaa%2Cb3e8d8c0-abba-4ae2-8297-0200076fe01e%2C16c4d84b-7e44-4cac-ae90-e4a807be480b%2Ca629e7a1-e7b7-4dd8-86b2-578ec3f67bef%2Cc2f15ee4-f768-42fd-84d7-8fe03bc2e850%2C913e78ee-b019-49c6-9cdd-b0c708135c10%2C92f5b8c7-f458-4d3d-941f-453110cad138%2Cb22f1cad-2242-44a5-a97d-8094f4149e5f%2Cc2164749-f6f0-4f64-92ae-f59dd2aa29e5%2C722f2065-f32e-43a3-b706-d790d727a969%2C06e98486-1c4d-4cb4-9e70-d0ccaf40f571%2C8da3be85-4bfc-40e0-898e-cd87932801c7%2C4558f17f-1f67-49ee-9a4d-6a8ee6a18d23%2C0aa5a074-60dd-4cad-a30b-ba2c8f67f6f4%2C90baddd2-4ca2-49a1-bd4f-6845d3784574%2C87049a4e-ca40-414d-80f2-f6c566d62cd2%2C8b2b73b6-c727-4812-8cc4-12efd8f44a30%2C2c5d9b5e-6a90-489d-9306-dd2519a53da4%2C2ecbb252-71e7-4cc7-9096-d8149596ce45%2Cc27cee97-f090-4145-b8db-8bbdde30b779%2Cd4489788-33eb-4da0-9ded-2a764deb6048%2C89c0d271-4d70-43a6-8929-594b2298401d%2C0fe8b049-1e1d-4aff-be7a-7acdef611922%2Cbcc68252-e898-49f9-ac92-4d0e2f32af42%2Cc98e1b16-ed87-40ab-8b8c-86537b62b9f5%2C9296f4ea-81ed-49da-aa4f-59bbffa0848d%2C9343c619-5688-4e68-a9bb-0a1c3a84a188%2C9dd47b8a-6e75-4de3-aec3-b26cd5107cfc%2C8033b59e-23ef-4903-8bb6-0e6124aabff9%2Cca05fc7d-e5c5-42a6-b4b0-4f4bee81f517%2Cedf7dcfd-95d2-4af8-af58-a1c7c04d19f0%2C920720e5-0938-4f20-a2ba-8336dce283ab%2C13a9252b-a946-479e-ae6e-a80bc1d36d89%2Cf106f107-3f5c-4f09-992d-a4f8c754ad59%2C19de97a3-f55e-4aa8-9dfd-92be2a3366b3%2Ce28fb8a9-f362-4c3a-b3ae-b65acc2aed70%2C1f48c19a-4746-475d-a16d-3a4e8ca678a8%2C6dec5d60-e3ab-46d2-af77-04899d3d4ba7%2Cd34d11ba-5bcc-4958-8902-a2809d4841bd%2C13c76c21-64b9-4aea-917b-2b6fe93f832a%2C53a8c21c-7f10-40fc-9bfb-a7031747ba77%2C604a764a-9916-4006-b4c7-6cdd8d11de98%2C8c62146e-db90-4b4b-bb76-80b53500152f%2Cb3232b20-487e-4364-b829-8adb45463ad0%2C47b5438b-b883-4491-8a0c-664c577c0b2a%2C791341e5-67bb-4f60-98f9-1be7e161d28b%2Cbe28b8ce-d90d-4248-9da2-fee319d68641%2C3e8d191c-6226-4dcb-ac9b-ca6693b42c3d%2Cbd576b40-5b69-4d7c-b093-bfa69b90cc0d%2Ca3631cba-abe9-4394-b1e5-9291feb371df&cursor=WyIyMDIxLTA0LTA4IDA1OjU2OjE3LjA4MjUyNyswMDowMCIsICJDdWUgV29tZW5zIFNpemUgMTAgU2hpcnRzICYgQmxvdXNlcyBNYXJvb24vU3RyaXBlZCAiLCAiY3VlLXdvbWVucy1zaXplLTEwLXNoaXJ0cy1ibG91c2VzLW1hcm9vbnN0cmlwZWQiXQ%3D%3D""""

    RegScala213.findAllMatchIn(query).toSeq
  }
}

problem

In the process of upgrading scala from 2.11 to 2.13, we are now hitting a StackOverflow error when using the scala parser combinator with the exact same code.
After investigating that issue, it turns out this is related to a change made on the stringLiteral parser regex.

In scala 2.11, the regex was ("\""+"""([^"\p{Cntrl}\\]|\\[\\'"bfnrt]|\\u[a-fA-F0-9]{4})*+"""+"\"").r and now it's ("\""+"""([^"\x00-\x1F\x7F\\]|\\[\\'"bfnrt]|\\u[a-fA-F0-9]{4})*"""+"\"").r.

The commit that changed the regex is scala/scala-parser-combinators@98737a2#diff-bce6263cece0f67933d12d2f709294696de6c553a335a8123819f0f97aa6587bL52.

The PR description states:
We also removed an invalid (and useless) + at the end of the regexp.

I'm not sure to get why the + is invalid. Can someone give me more details?

Start with the reported Scala 2.11 versus 2.13 reproduction and the stringLiteral parser regex change in commit 98737a2. Compare the two regexes and the StackOverflow trace, then determine whether the parser-combinators project needs a regression fix or only an explanation of the removed quantifier; done means the behavior is understood and any regression is covered by a reproducible test.