[runtime/metrics](/pkg/runtime/metrics/) counter
named `/godebug/non-default-behavior/<name>:events`
that counts the number of times a particular program's
behavior has changed based on a non-default value
for that setting.
For example, when `GODEBUG=http2client=0` is set,
`/godebug/non-default-behavior/http2client:events`
counts the number of HTTP transports that the program
has configured without HTTP/2 support.

pkg syscall (freebsd-riscv64), type Kevent_t struct #53466
pkg syscall (freebsd-riscv64), type Kevent_t struct, Data int64 #53466
pkg syscall (freebsd-riscv64), type Kevent_t struct, Fflags uint32 #53466
pkg syscall (freebsd-riscv64), type Kevent_t struct, Filter int16 #53466
pkg syscall (freebsd-riscv64), type Kevent_t struct, Flags uint16 #53466
pkg syscall (freebsd-riscv64), type Kevent_t struct, Ident uint64 #53466

			if (this.exited) {
				this._resolveExitPromise();
			}
		}

		_makeFuncWrapper(id) {
			const go = this;
			return function () {
				const event = { id: id, this: this, args: arguments };
				go._pendingEvent = event;
				go._resume();
				return event.result;
			};
		}
	}

pkg syscall (openbsd-amd64), type Dirent struct, X__d_padding [4]uint8
pkg syscall (openbsd-amd64), type FdSet struct, Bits [32]uint32
pkg syscall (openbsd-amd64), type Kevent_t struct, Data int64
pkg syscall (openbsd-amd64), type Kevent_t struct, Ident uint64
pkg syscall (openbsd-amd64), type Mclpool struct, Grown int32
pkg syscall (openbsd-amd64), type RtMetrics struct, Expire int64

pkg syscall (netbsd-arm64-cgo), type Kevent_t struct
pkg syscall (netbsd-arm64-cgo), type Kevent_t struct, Data int64
pkg syscall (netbsd-arm64-cgo), type Kevent_t struct, Fflags uint32
pkg syscall (netbsd-arm64-cgo), type Kevent_t struct, Filter uint32
pkg syscall (netbsd-arm64-cgo), type Kevent_t struct, Flags uint32
pkg syscall (netbsd-arm64-cgo), type Kevent_t struct, Ident uint64

<p>
the function calls and communication happen in the order
<code>f()</code>, <code>h()</code>, <code>i()</code>, <code>j()</code>,
<code>&lt;-c</code>, <code>g()</code>, and <code>k()</code>.
However, the order of those events compared to the evaluation
and indexing of <code>x</code> and the evaluation
of <code>y</code> is not specified.
</p>

<pre>
a := 1
f := func() int { a++; return a }

pkg syscall (darwin-386), type Kevent_t struct
pkg syscall (darwin-386), type Kevent_t struct, Data int32
pkg syscall (darwin-386), type Kevent_t struct, Fflags uint32
pkg syscall (darwin-386), type Kevent_t struct, Filter int16
pkg syscall (darwin-386), type Kevent_t struct, Flags uint16
pkg syscall (darwin-386), type Kevent_t struct, Ident uint32
pkg syscall (darwin-386), type Kevent_t struct, Udata *uint8

pkg syscall (windows-386), const CTRL_CLOSE_EVENT = 2
pkg syscall (windows-386), const CTRL_CLOSE_EVENT ideal-int
pkg syscall (windows-386), const CTRL_LOGOFF_EVENT = 5
pkg syscall (windows-386), const CTRL_LOGOFF_EVENT ideal-int
pkg syscall (windows-386), const CTRL_SHUTDOWN_EVENT = 6
pkg syscall (windows-386), const CTRL_SHUTDOWN_EVENT ideal-int
pkg syscall (windows-amd64), const CTRL_CLOSE_EVENT = 2

pkg syscall (darwin-arm64), type Kevent_t struct
pkg syscall (darwin-arm64), type Kevent_t struct, Data int64
pkg syscall (darwin-arm64), type Kevent_t struct, Fflags uint32
pkg syscall (darwin-arm64), type Kevent_t struct, Filter int16
pkg syscall (darwin-arm64), type Kevent_t struct, Flags uint16
pkg syscall (darwin-arm64), type Kevent_t struct, Ident uint64

	origX := *px
	*px = ast.NewIdent(fmt.Sprintf("_cgoBase%d", i))
	fmt.Fprintf(sb, "_cgo%d := %s; ", i, gofmtPos(arg, arg.Pos()))
	*px = origX

	// Use "0 == 0" to do the right thing in the unlikely event
	// that "true" is shadowed.
	fmt.Fprintf(sbCheck, "_cgoCheckPointer(_cgoBase%d, 0 == 0); ", i)

	return true
}

// checkSlice checks whether arg has the form x[i:j], possibly inside