track down crash

Signed-off-by: Achille Roussel <[email protected]>

compiler/go.mod

@@ -9,6 +9,7 @@ require (
 )
 
 require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	golang.org/x/mod v0.12.0 // indirect
 	golang.org/x/sys v0.12.0 // indirect
 )

compiler/go.sum

@@ -1,3 +1,5 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
 github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 golang.org/x/mod v0.12.0 h1:rmsUpXtvNzj340zd98LZ4KntptpfRHwpFOHG188oHXc=

compiler/testdata/coroutine.go

@@ -328,6 +328,19 @@ func Range10ClosureHeterogenousCapture() {
 
 	n := 0
 	x := func() bool {
+		print("---",
+			"\n  n = ", n, " @", &n,
+			"\n  a = ", a, " @", &a,
+			"\n  b = ", b, " @", &b,
+			"\n  c = ", c, " @", &c,
+			"\n  d = ", d, " @", &d,
+			"\n  e = ", e, " @", &e,
+			"\n  f = ", f, " @", &f,
+			"\n  g = ", g, " @", &g,
+			"\n  h = ", h, " @", &h,
+			"\n  i = ", i, " @", &i,
+			"\n---\n",
+		)
 		var v int
 		switch n {
 		case 0:

coroutine_durable.go

@@ -2,7 +2,11 @@
 
 package coroutine
 
-import "github.com/stealthrocket/coroutine/internal/serde"
+import (
+	"fmt"
+
+	"github.com/stealthrocket/coroutine/internal/serde"
+)
 
 type serializedCoroutine struct {
 	entry  func()
@@ -52,6 +56,7 @@ func (c *Context[R, S]) MarshalAppend(b []byte) ([]byte, error) {
 // the number of bytes that were read in order to reconstruct the
 // context.
 func (c *Context[R, S]) Unmarshal(b []byte) (int, error) {
+	fmt.Println("UNMARSHAL:", &b[0])
 	start := len(b)
 	v, b := serde.Deserialize(b)
 	s := v.(*serializedCoroutine)

internal/serde/reflect.go

@@ -7,6 +7,7 @@ import (
 	"reflect"
 	"unsafe"
 
+	"github.com/davecgh/go-spew/spew"
 	"github.com/stealthrocket/coroutine/types"
 )
 
@@ -288,6 +289,7 @@ func deserializePointedAt(d *Deserializer, t reflect.Type) reflect.Value {
 		ep := e.UnsafePointer()
 		d.store(id, ep)
 		DeserializeAny(d, t, ep)
+		fmt.Printf("deserializePointedAt: %p => %v (%s)\n", ep, e.Elem().Interface(), t)
 		return e
 	}
 
@@ -465,6 +467,11 @@ func serializeFunc(s *Serializer, t reflect.Type, p unsafe.Pointer) {
 
 	if fn.Closure != nil {
 		t := fn.Closure
+		v := reflect.NewAt(t, p)
+
+		fmt.Println("SERIALIZE")
+		spew.Dump(v.Interface())
+
 		serializeStructFields(s, p, t.NumField()-1, func(i int) reflect.StructField {
 			return t.Field(i + 1)
 		})
@@ -496,7 +503,8 @@ func deserializeFunc(d *Deserializer, t reflect.Type, p unsafe.Pointer) {
 		deserializeStructFields(d, closure, t.NumField()-1, func(i int) reflect.StructField {
 			return t.Field(i + 1)
 		})
-		//fmt.Printf("%#v\n", v.Interface())
+		fmt.Print("DESERIALIZE")
+		spew.Dump(v.Interface())
 
 		*(*unsafe.Pointer)(p) = closure
 	} else {