stripe-go: invalid character '<' looking for beginning of value

Hey,

Some requests are failing with the following error:

invalid character '<' looking for beginning of value

I configured the number of retries to 3. Here’s a timeline of what happened:

On the Stripe dashboard:

12:42:50 POST /charges ends with 200
12:42:52 POST /charges ends with 409

On my logs with LogLevel = 5:

[app logs] 2018-08-01T10:42:53.489Z\",\"caller\":\"logger/logger.go:36\",\"message\":\"Stripe request ended with an error: invalid character '<' looking for beginning of value\", 

[stripe-go logs] 
"2018/08/01 10:42:53 Retry request https://api.stripe.com/v1/charges 1 time.",
"2018/08/01 10:42:53 Stripe Response: \"{\\\\"id\\\": \\\"ch_*\\\",\
"2018/08/01 10:42:53 Completed in 2.784733977s",
"2018/08/01 10:42:52 Request failed with error: <nil>. Response: &{409....
"2018/08/01 10:42:52 Requesting POST api.stripe.com/v1/charges"
"2018/08/01 10:42:50 Requesting POST api.stripe.com/v1/charges"

One of the two requests ended with a 409 and was retried and failed with the error in the title. As it does not appear on the dashboard, it seems it did not reach your servers.

AFAIK, it should have been retried.

Similar but maybe not related to #528

go version: 1.10.1 stripe-go: 35.1.0

Thanks!