I agree with @andrea because, in my code i didn't refer any outer or global variables. It happened same when i just use only "var client = newAsyncHttpClient()"
may be newAsyncHttpClient contains GC Unsafe things?
i think i got it.
let defaultSSLContext: SSLContext = nil #(306 at httpclient.nim)
this caused gc unsafe.
i copied the code of
proc newHttpClient*(userAgent = defUserAgent,
maxRedirects = 5, sslContext = defaultSslContext, proxy: Proxy = nil,
timeout = -1): HttpClient =
and warning goes away within the proc yes getContent requires ssl context also so it has same problem
I think all the async related standard library must be gcsafe.
because, we as a user can make gc un safe error easily. so the warning must be useful.