# How to suppress JETLS warnings

**URL:** <https://discourse.julialang.org/t/how-to-suppress-jetls-warnings/137649>\
**Category:** General Usage\
**Tags:** question, jetls\
**Created:** [June 16, 2026, 9:22am UTC](https://discourse.julialang.org/t/how-to-suppress-jetls-warnings/137649 "2026-06-16T09:22:20Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ufechner7](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/ufechner7/32/51363_2.png) [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Post date:** [June 16, 2026, 9:22am UTC](https://discourse.julialang.org/t/how-to-suppress-jetls-warnings/137649/1 "2026-06-16T09:22:20Z")

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In general, JETLS helps a lot. But some warnings I would like to suppress, for example this one:

```julia-auto
  `ADD_MIRROR` is not concretized but JET needs to use its actual value in order to define types or methods.
- If this binding can be declared as a constant, try to declare it as a constant (i.e. `const ADD_MIRROR = ...`).
- You may need to specify `:(ADD_MIRROR = x_)` pattern to the `concretization_patterns`
  configuration to allow JET to actually evaluate this binding, e.g.,
  `report_file("path/to/file.jl"; concretization_patterns = [:(ADD_MIRROR = x_)])`.
- If the above approaches do not work, try `concretization_patterns = [:(x_)]` to
  concretize all top-level code in the module (recommended as a last resort since it
  would incur any side effects in your code and may cause the analysis to take longer time).

```

I already have the following lines in my .JETLSConfig.toml file, but it does not help:

```toml
[[diagnostic.patterns]]
pattern = "not concretized"
match_by = "message"
match_type = "regex"
severity = "off"

```

Any idea?

---

<div class="post-metadata">

**Author:** ![ufechner7](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/ufechner7/32/51363_2.png) [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Post date:** [June 18, 2026, 2:49pm UTC](https://discourse.julialang.org/t/how-to-suppress-jetls-warnings/137649/2 "2026-06-18T14:49:50Z")

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> [@ufechner7](#):
>
> `not concretized`

With the new release of JETLS (2026-06-18), the warning `is not concretized` disappeared. Needs further testing if it really disappeared in all cases, but it looks promising!

Hopefully, suppressing it is no longer needed.