I have got a strange bug in Golang.
OS: Linux Ubuntu 18.04.
CPU: AMD with 64 Bit Support.
IDE is Goland 2018.1.5.
Go version is 1.10.1.
Compiler is set to: 'Any'.
I have tried both 'gc' and 'gccgo' compilers. Result is the same.
In the program below, Debugger shows strange things. The 'aUnion' variable has "John" inside it, but the 'aRecord' variable which has a Union type in it, has no "John" inside.
If i 'fmt.Printf' them, they are both there, but Debugger shows no John inside 'aRecord'. Is that a debugger's bug?
The program is very simple. Just nested structs passed as a pointer.
// 33.go.
package main
import "fmt"
type Person struct {
Name string
Age int
}
type GroupOfPeople struct {
Name string
People []*Person
}
type Union struct {
ID int
Group *GroupOfPeople
}
type Record struct {
UnionField *Union
Type int
}
func main() {
var aPerson *Person
var people []*Person
var aGroup *GroupOfPeople
var aUnion *Union
var aRecord *Record
aPerson = &Person{
Name: "John",
Age: 10,
}
people = []*Person{aPerson}
aGroup = &GroupOfPeople{
Name: "A Group",
People: people,
}
aUnion = &Union{
ID: 123,
Group: aGroup,
} // John is inside 'aUnion'.
aRecord = &Record{
UnionField: aUnion,
Type: 666,
}
// John is NOT inside 'aRecord'.
// WHY ?!
fmt.Printf("aUnion: %+v.
", aUnion.Group.People[0])
fmt.Printf("aRecord: %+v.
", aRecord.UnionField.Group.People[0])
}
Thank you for help!
