Go runtime misbehaves in forked processes

cbin.c

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <dlfcn.h>
#include <errno.h>

typedef void (*golib_func)(void);

int main() {
	int             i;
	for (i = 0; i < 5; i++) {
		if (0 == fork()) {
			// load lib and func symbol
			void			*golib = NULL;
			golib_func 		f;

			printf("Start child %i (%i)\n", i, getpid());
			if (NULL != (golib = dlopen("./golib.so", RTLD_NOW|RTLD_NODELETE))) {
				if (NULL != (f = dlsym(golib, "TestNetDial"))) {
		 			for(i = 0; i < 10; i++)
						(*f)();
				} else {
					printf("%s\n", dlerror());
				}

				dlclose(golib);
			} else {
				printf("%s\n", dlerror());
			}
			
			exit(0);
		}
	}

	for (i = 0; i < 5; i++)
		wait(NULL);
}

golib.go

package main

import "C"

import (
	"fmt"
	"net"
	"os"
)

func main() {
	// nothing to do here
}

//export TestNetDial
func TestNetDial() {
	conn, err := net.Dial("tcp", "golang.org:443")
	if err != nil {
		panic(err)
	}

	defer conn.Close()

	fmt.Printf("--> Connected to %s in PID %v\n", conn.RemoteAddr(), os.Getpid())
}

Makefile

all: cbin golib.so

cbin: cbin.c
	gcc -ldl -o cbin cbin.c

golib.so: golib.go
	go build -x -buildmode=c-shared -o golib.so golib.go

clean:
	rm -vf cbin golib.so

.PHONY: all clean