runtime/trace: NextGC is 0 if no GC was triggered during the trace #52517
Description
What version of Go are you using (go version)?
$ go version go version devel go1.19-7d48c32412 Wed Apr 13 21:11:38 2022 +0800 darwin/amd64
Does this issue reproduce with the latest release?
yes
What operating system and processor architecture are you using (go env)?
go env Output
$ go env
What did you do?
package main
import (
"os"
"runtime"
"runtime/trace"
)
var global interface{}
func init() {
global = make([]interface{}, 100000000)
}
var global2 []interface{}
func main() {
runtime.GC()
var f, _ = os.Create("trace1.out")
trace.Start(f)
for i := 0; i < 10000; i++ {
global2 = append(global2, make([]int, 100))
}
trace.Stop()
global2 = nil
var f2, _ = os.Create("trace2.out")
trace.Start(f2)
runtime.GC()
for i := 0; i < 10000; i++ {
global2 = append(global2, make([]int, 100))
}
trace.Stop()
global2 = nil
}
// go tool trace -http=127.0.0.1:8082 ./trace1.out
// go tool trace -http=127.0.0.1:8083 ./trace2.out
What did you expect to see?
What did you see instead?
