New Go SDK does not support the use of Goroutines

[OwenJacob]

I'm using Goroutines because I want to deal with many accounts as quickly as possible as part of a test suite. When I use the new SDK to call to Horizon (so far I have only tried to use SubmitTransactionXDR or AccountDetails concurrently) The code panics.

A small piece of example code that attempts to get multiple account details concurrently:

func Concurrentaccount() {
	var wg sync.WaitGroup

	for i := 0; i < 1000; i++ {
		wg.Add(1)
		go func(i int) {
			defer wg.Done()
			reqsource := horizonclient.AccountRequest{AccountID: testAccs[i].publickey}
			source, _ := c.AccountDetail(reqsource)
			fmt.Println(source)
		}(i)
	}
	wg.Wait()
}

testAccs[i].publickey is an array of structs holding keypairs as strings.

A typical panic message:

goroutine 880 [running]:
runtime.throw(0x1366d04, 0x15)
	/usr/local/go/src/runtime/panic.go:617 +0x72 fp=0xc00078b7f8 sp=0xc00078b7c8 pc=0x102ce42
runtime.mapassign_faststr(0x1300aa0, 0xc0000a97d0, 0xc0000729a8, 0x17, 0x15f88a0)
	/usr/local/go/src/runtime/map_faststr.go:291 +0x3ff fp=0xc00078b860 sp=0xc00078b7f8 pc=0x101428f
github.com/stellar/go/clients/horizonclient.setCurrentServerTime(0xc0000729a8, 0x17, 0xc00336d390, 0x1, 0x1)
	/go/src/github.com/stellar/go/clients/horizonclient/internal.go:118 +0x1ea fp=0xc00078b908 sp=0xc00078b860 pc=0x12bb50a
github.com/stellar/go/clients/horizonclient.decodeResponse(0xc0012fb7a0, 0x12e1ac0, 0xc000724610, 0x0, 0x0)
	/go/src/github.com/stellar/go/clients/horizonclient/internal.go:20 +0x2fa fp=0xc00078b980 sp=0xc00078b908 pc=0x12bb13a
github.com/stellar/go/clients/horizonclient.(*Client).sendRequestURL(0x15f8720, 0xc0000729a0, 0x61, 0x1360d36, 0x3, 0x1332d40, 0xc0006d9980, 0xc000040af8, 0xc00000f4e0)
	/go/src/github.com/stellar/go/clients/horizonclient/client.go:67 +0x396 fp=0xc00078ba48 sp=0xc00078b980 pc=0x12ba4d6
github.com/stellar/go/clients/horizonclient.(*Client).sendRequest(0x15f8720, 0x13d1260, 0xc00000f4e0, 0x1332d40, 0xc0006d9980, 0x0, 0x0)
	/go/src/github.com/stellar/go/clients/horizonclient/client.go:37 +0x216 fp=0xc00078bab0 sp=0xc00078ba48 pc=0x12ba0e6
github.com/stellar/go/clients/horizonclient.(*Client).AccountDetail(0x15f8720, 0xc000168b52, 0x38, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	/go/src/github.com/stellar/go/clients/horizonclient/client.go:233 +0x108 fp=0xc00078bb28 sp=0xc00078bab0 pc=0x12bacb8
git.sabay.com/payment-network/app.srv.spn-loadtest.sabay.one/accops.Concurrentaccount.func1(0xc000016fe4, 0x30b)
	/go/src/git.sabay.com/payment-network/app.srv.spn-loadtest.sabay.one/accops/helpers.go:126 +0xcd fp=0xc00078bfd0 sp=0xc00078bb28 pc=0x12bca4d
runtime.goexit()
	/usr/local/go/src/runtime/asm_amd64.s:1337 +0x1 fp=0xc00078bfd8 sp=0xc00078bfd0 pc=0x1058501
created by git.sabay.com/payment-network/app.srv.spn-loadtest.sabay.one/accops.Concurrentaccount
	/go/src/git.sabay.com/payment-network/app.srv.spn-loadtest.sabay.one/accops/helpers.go:123 +0x82
exit status 2

In the depreciated Go SDK I was able to submit transactions and request account details concurrently

[debnil]

@OwenJacob: #1276 fixed this error for my use case. It's been merged onto the master branch and will be included in the next release (1.2) of horizonclient this week.