https://issues.dlang.org/show_bug.cgi?id=24596
Issue ID: 24596
Summary: Rebindable2 corrupts objects
Product: D
Version: D2
Hardware: x86_64
OS: Linux
Status: NEW
Severity: critical
Priority: P1
Component: dmd
Assignee: [email protected]
Reporter: [email protected]
object.destroy is, perhaps appropriately, the most destructive function ever
written.
It does something useful (resetting the value and calling the destructor) for
structs and struct derivatives, but something horrible (destroying the *class
data*) for objects. So you're always tempted to use it, but you have to
remember, every time, to disable the cases where it causes silent future
crashes.
I forgot this time.
```
module test;
import std.algorithm;
class A {
int i;
int getI() => i;
this(int i) { this.i = i; }
}
void main() {
auto arr = [new A(2), new A(3)];
auto max = arr.maxElement!(a => a.getI);
// Due to maxElement calling extremum which uses Rebindable2
// which calls destroy
// the vtable pointer of arr[0] is now zeroed out.
assert(arr[0].getI == 2);
}
```
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