Swagger spec generation doesn't work with go1.18 due to changes in runtime.FuncForPC

[e-nikolov]

Something changed between go1.18beta2 and go1.18 resulting in runtime.FuncForPC(ptr).FileLine() returning <autogenerated> instead of a file name

golang/go#51774

[e-nikolov]

The request/response json.Unmarshal/json.Marshal works at runtime with go1.18, but the swagger generation fails during the static code analysis.

As a workaround, go1.18beta2 can be used at compile time for the generation of the swagger spec and go1.18 can be used at runtime for the generic handlers.

[e-nikolov]

A more robust approach should be looked into for linking a handler function that is used at runtime with the comment that contains its extended swagger annotations. Perhaps the Delve debugger can help.