diff --git a/src/runtime/coro.go b/src/runtime/coro.go
index f0aa868952..d378e92de8 100644
--- a/src/runtime/coro.go
+++ b/src/runtime/coro.go
@@ -211,6 +211,18 @@ func coroswitch_m(gp *g) {
 	// directly if possible.
 	setGNoWB(&mp.curg, gnext)
 	setMNoWB(&gnext.m, mp)
+
+	// Synchronize with any out-standing goroutine profile. We're about to start
+	// executing, and an invariant of the profiler is that we tryRecordGoroutineProfile
+	// whenever a goroutine is about to start running.
+	//
+	// N.B. We must do this before transitioning to _Grunning but after installing gnext
+	// in curg, so that we have a valid curg for allocation (tryRecordGoroutineProfile
+	// may allocate).
+	if goroutineProfile.active {
+		tryRecordGoroutineProfile(gnext, nil, osyield)
+	}
+
 	if !gnext.atomicstatus.CompareAndSwap(_Gwaiting, _Grunning) {
 		// The CAS failed: use casgstatus, which will take care of
 		// coordinating with the garbage collector about the state change.
diff --git a/src/runtime/pprof/pprof_test.go b/src/runtime/pprof/pprof_test.go
index e9f287df60..19641f62aa 100644
--- a/src/runtime/pprof/pprof_test.go
+++ b/src/runtime/pprof/pprof_test.go
@@ -15,6 +15,7 @@ import (
 	"internal/syscall/unix"
 	"internal/testenv"
 	"io"
+	"iter"
 	"math"
 	"math/big"
 	"os"
@@ -1784,6 +1785,50 @@ func TestGoroutineProfileConcurrency(t *testing.T) {
 	}
 }
 
+// Regression test for #69998.
+func TestGoroutineProfileCoro(t *testing.T) {
+	testenv.MustHaveParallelism(t)
+
+	goroutineProf := Lookup("goroutine")
+
+	// Set up a goroutine to just create and run coroutine goroutines all day.
+	iterFunc := func() {
+		p, stop := iter.Pull2(
+			func(yield func(int, int) bool) {
+				for i := 0; i < 10000; i++ {
+					if !yield(i, i) {
+						return
+					}
+				}
+			},
+		)
+		defer stop()
+		for {
+			_, _, ok := p()
+			if !ok {
+				break
+			}
+		}
+	}
+	var wg sync.WaitGroup
+	done := make(chan struct{})
+	wg.Add(1)
+	go func() {
+		defer wg.Done()
+		for {
+			iterFunc()
+			select {
+			case <-done:
+			default:
+			}
+		}
+	}()
+
+	// Take a goroutine profile. If the bug in #69998 is present, this will crash
+	// with high probability. We don't care about the output for this bug.
+	goroutineProf.WriteTo(io.Discard, 1)
+}
+
 func BenchmarkGoroutine(b *testing.B) {
 	withIdle := func(n int, fn func(b *testing.B)) func(b *testing.B) {
 		return func(b *testing.B) {