# stdlib.Symbols - Symbols not declared by package stdlib

**URL:** <https://community.traefik.io/t/stdlib-symbols-symbols-not-declared-by-package-stdlib/11105>\
**Category:** Yaegi\
**Created:** [July 5, 2021, 7:18pm UTC](https://community.traefik.io/t/stdlib-symbols-symbols-not-declared-by-package-stdlib/11105 "2021-07-05T19:18:58Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![yanivyakobovich](https://sea2.discourse-cdn.com/flex020/user_avatar/community.traefik.io/yanivyakobovich/32/3970_2.png) [@yanivyakobovich](https://community.traefik.io/u/yanivyakobovich)\
**Post date:** [July 5, 2021, 7:18pm UTC](https://community.traefik.io/t/stdlib-symbols-symbols-not-declared-by-package-stdlib/11105/1 "2021-07-05T19:18:58Z")

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Hey,

I have just upgraded [github.com/traefik/yaegi](http://github.com/traefik/yaegi) v0.9.2 to v0.9.19  
Now, I have a problem when I try to use stdlib.Symbols I get that Symbols not declared by package stdlib.  
The problem is that I can't reconstruct the problem with a sample.go to open on it an issue. because it is working when I test it with a small project.

Any ideas how to fix it ?

Thanks

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**Author:** ![daniel.tomcej](https://sea2.discourse-cdn.com/flex020/user_avatar/community.traefik.io/daniel.tomcej/32/262_2.png) [@daniel.tomcej](https://community.traefik.io/u/daniel.tomcej)\
**Post date:** [July 5, 2021, 7:31pm UTC](https://community.traefik.io/t/stdlib-symbols-symbols-not-declared-by-package-stdlib/11105/2 "2021-07-05T19:31:11Z")

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Hello @yanivyakobovich,

what version of go are you using?

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**Author:** ![yanivyakobovich](https://sea2.discourse-cdn.com/flex020/user_avatar/community.traefik.io/yanivyakobovich/32/3970_2.png) [@yanivyakobovich](https://community.traefik.io/u/yanivyakobovich)\
**Post date:** [July 5, 2021, 7:56pm UTC](https://community.traefik.io/t/stdlib-symbols-symbols-not-declared-by-package-stdlib/11105/3 "2021-07-05T19:56:20Z")

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Hey @daniel.tomcej

I am using GO 1.15

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**Author:** ![daniel.tomcej](https://sea2.discourse-cdn.com/flex020/user_avatar/community.traefik.io/daniel.tomcej/32/262_2.png) [@daniel.tomcej](https://community.traefik.io/u/daniel.tomcej)\
**Post date:** [July 6, 2021, 10:27pm UTC](https://community.traefik.io/t/stdlib-symbols-symbols-not-declared-by-package-stdlib/11105/4 "2021-07-06T22:27:21Z")

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Hello @yanivyakobovich,

Each Yaegi version supports the two major versions of Go when it is released.

Yaegi v0.9.2 supports Go 1.14 and 1.15, and Yaegi v0.9.19 supports Go 1.15 and 1.16 (as support for 1.16 was added, and support for 1.14 was dropped in 0.9.14).

If you try to run 0.9.2 with go 1.16, or 0.9.19 with go 1.14, you will encounter this error.

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<div class="post-metadata">

**Author:** ![yanivyakobovich](https://sea2.discourse-cdn.com/flex020/user_avatar/community.traefik.io/yanivyakobovich/32/3970_2.png) [@yanivyakobovich](https://community.traefik.io/u/yanivyakobovich)\
**Post date:** [July 7, 2021, 12:34pm UTC](https://community.traefik.io/t/stdlib-symbols-symbols-not-declared-by-package-stdlib/11105/5 "2021-07-07T12:34:41Z")

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Hey @daniel.tomcej

Thanks, it works.