# Panicked at 'range end index 1576 out of range for slice of length 1356'

**URL:** <https://forum.fuel.network/t/panicked-at-range-end-index-1576-out-of-range-for-slice-of-length-1356/2631>\
**Category:** Sway\
**Created:** [May 17, 2023, 10:52am UTC](https://forum.fuel.network/t/panicked-at-range-end-index-1576-out-of-range-for-slice-of-length-1356/2631 "2023-05-17T10:52:53Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![fuel](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.fuel.network/fuel/32/1677_2.png) [@fuel](https://forum.fuel.network/u/fuel)\
**Post date:** [May 17, 2023, 10:52am UTC](https://forum.fuel.network/t/panicked-at-range-end-index-1576-out-of-range-for-slice-of-length-1356/2631/1 "2023-05-17T10:52:53Z")

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Hi guys  
what does this error mean when I’m trying to send money to the predicate root?

```auto
thread 'local_tests::fulfill_order_test::fulfill_order_test' panicked at 'range end index 1576 out of range for slice of length 1356', /Users/alexey/.cargo/git/checkouts/fuels-rs-ce5f345b87bf4c50/386fab5/packages/fuels-core/src/lib.rs:26:13

```

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<div class="post-metadata">

**Author:** ![Voxelot](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.fuel.network/voxelot/32/12_2.png) [@Voxelot](https://forum.fuel.network/u/Voxelot)\
**Post date:** [May 17, 2023, 5:43pm UTC](https://forum.fuel.network/t/panicked-at-range-end-index-1576-out-of-range-for-slice-of-length-1356/2631/2 "2023-05-17T17:43:56Z")

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Could you provide more context or a minimally reproducible example in sway code?

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<div class="post-metadata">

**Author:** ![fuel](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.fuel.network/fuel/32/1677_2.png) [@fuel](https://forum.fuel.network/u/fuel)\
**Post date:** [May 17, 2023, 6:17pm UTC](https://forum.fuel.network/t/panicked-at-range-end-index-1576-out-of-range-for-slice-of-length-1356/2631/3 "2023-05-17T18:17:16Z")

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More context you can find here

> [@Why does the predicate call fail when I remove checks from it?](https://forum.fuel.network/t/why-does-the-predicate-call-fail-when-i-remove-checks-from-it/2633):
>
> Hi guys I have this predicate, it builds well and all tests are pass I have a few checks of output types here like that After checking the [sway repo](https://github.com/FuelLabs/sway/blob/29b1d0c47bfad4573449451ba520ded9e0a26a8a/sway-lib-std/src/outputs.sw#L41) I understand that checks on lines 58 and 61 do the same and I decided to remove one of them But if I comment first one (lines 57-60) and run forc build && cargo test I have this errors during sending of money to predicate thread 'local\_tests::cancel\_order\_test::cancel\_order\_test' panicked at 'range end index 1576 out of range for slice of len…

I just updated forc version and will try the new version  
And also it can be cache issues because @sarah mentioned that works for she

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**Author:** ![system](https://us1.discourse-cdn.com/flex022/uploads/fuel/original/2X/5/57d5a345cc15a64b636e0d56e042857f8a0e80b1.png) [@system](https://forum.fuel.network/u/system)\
**Post date:** [June 7, 2023, 2:17pm UTC](https://forum.fuel.network/t/panicked-at-range-end-index-1576-out-of-range-for-slice-of-length-1356/2631/4 "2023-06-07T14:17:55Z")

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