Cannot use context variable claims to access NUMERIC JWT token claims(e.g iat and exp)

[iamtour]

Do you want to request a feature or report a bug?
bug
What is the current behavior?
I am using OIDC, with JWT to access api. After api call passed the auth, tyk_gateway cannot extract NUMERIC token claims in token payload. eg. iat and exp in my token. While some other STRING claims can be extracted. e.g. sub
Find two lines of error log when this issue happened:
time="Mar 24 13:33:37" level=error msg="Context variable type is not supported: float64"
time="Mar 24 13:33:37" level=error msg="Context variable type is not supported: float64"
Seems it is an issue of "mw_url_rewrite.go"(func valToStr)

Bearer eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6ImkxMjM0NTY3ODAxIn0.eyJpc3MiOiJodHRwOi8vaWRwLXVhdC5pZnVuZC5jb20uaGsvIiwic3ViIjoiaTEyMzQ1Njc4MDEiLCJpYXQiOjE1MjE3OTM1MDcsImV4cCI6MTUzMTc5MzUwOCwiYXVkIjoiYjJiIn0.YOPiT4KHcRnwS6ZTtKutPsrRkSLRL_FtWYRE9vgDH-B_TQPABo4zophUvMV2wMZfESK_4KqsLKtLKz7dSM_yFmni66Ij9aUEs4991hc0u88OsXR6x5u35CWCmOnhXWFq2GMQZT79_QWC2Czr_lG0pUsbChWZKE6kLdSgQJEmfDB8IJqmyd9TGQvAn8HUPMtX3khusMXFf3AqSuU5YCvkPWS0MVzXpibCxSd0uVbRzRV-LrV4h5xf3FbCL7bXsLfXumYibtQDgFd4yPhsSM9rbJjO9ogrUPFy4rwwbvIiFcAMordOQb9iEeZgxuiPlkjVCvX7EnTEP9435eVbjcWFpVFcFDGyUZF56iozqP27I7XwINjAm5PBFM7FieayI9i5T_RU-dpFbqYoTwvQj-XNxRxYC9kH4qaebCRHGVcUGtiYMG9biG3Z7Obt1ym2FuM1oND9mLpCFxaC4j587iXRyycSzACpktLTlqFJoJYINLgS27JDRJ8fSjsj6Wp8-oW7mn1kERg2G0P4o83vONV6Vk-wxhkAQZVnUldsUNOPLEfxFB8V8oqUrAhogmi0uCAqWtbpUY6sdgnjHIaxG0rUvhgeEjVSBWI8Wz75MBGTSfQs7atS7EKUsf-kc8532MpQzGbkPQAROIXa6RUu2UHu7W2QUUxMcSpwtkoCTUsdM7I

As can be find in doc, jwt_claims_CLAIMNAME - If JWT tokens are being used, then each claim in the JWT is available in this format to the context processor., seems like not all claims are parsed.

What is the expected behavior?
Can access all the token payload claims from context variable. e.g. iat and exp
If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem
Create OIDC auth api, log the output from jwt_claims_TOKEN_HEADER_CLAIM.
Which versions of Tyk affected by this issue? Did this work in previous versions of Tyk?
tyk v2.5.3

[buger]

Should be fixed by #1569

[iamtour]

@buger Could it be included into 2.5.4 this week? Thanks.

[buger]

Yes