package a

func Marshal[foobar any]() {
	_ = NewEncoder[foobar]()
}

func NewEncoder[foobar any]() *Encoder[foobar] {
	return nil
}

type Encoder[foobar any] struct {
}

func (e *Encoder[foobar]) EncodeToken(t Token[foobar]) {

}

type Token[foobar any] any

package b

import "a"

func F() {
	a.Marshal[int]()
}

$GOROOT/test/typeparam/issueXXXX.dir/a.go:18:6: internal compiler error: failed to find type loop for: a.Token[int]

goroutine 1 [running]:
runtime/debug.Stack()
	/Users/khr/sandbox/ro/src/runtime/debug/stack.go:24 +0x65
cmd/compile/internal/base.FatalfAt({0x1?, 0x0?}, {0x193390a, 0x20}, {0xc0003ead00, 0x1, 0x1})
	/Users/khr/sandbox/ro/src/cmd/compile/internal/base/print.go:227 +0x1d7
cmd/compile/internal/base.Fatalf(...)
	/Users/khr/sandbox/ro/src/cmd/compile/internal/base/print.go:196
cmd/compile/internal/types.reportTypeLoop(0xc0003ed880)
	/Users/khr/sandbox/ro/src/cmd/compile/internal/types/size.go:312 +0xbf
cmd/compile/internal/types.CalcSize(0xc0003ed880)
	/Users/khr/sandbox/ro/src/cmd/compile/internal/types/size.go:477 +0x68d
cmd/compile/internal/types.calcStructOffset(0xc0003ed960, 0xc0003edab0, 0x8, 0x8)
	/Users/khr/sandbox/ro/src/cmd/compile/internal/types/size.go:191 +0xd3
cmd/compile/internal/types.CalcSize(0xc0003edb90)
	/Users/khr/sandbox/ro/src/cmd/compile/internal/types/size.go:532 +0x90e
cmd/compile/internal/types.ResumeCheckSize()
	/Users/khr/sandbox/ro/src/cmd/compile/internal/types/size.go:633 +0x4e
cmd/compile/internal/typecheck.(*Tsubster).Typ(0x1f95aa0?, 0xc0003e0340?)
	/Users/khr/sandbox/ro/src/cmd/compile/internal/typecheck/subr.go:1051 +0x2f
cmd/compile/internal/noder.(*genInst).getDictionarySym(0x1f95aa0, 0xc0003e0340, {0xc0000ba518, 0x1, 0x1}, 0x0)
	/Users/khr/sandbox/ro/src/cmd/compile/internal/noder/stencil.go:1565 +0x437
cmd/compile/internal/noder.(*genInst).getDictionaryValue(0x0?, {0xba4f0?, 0xc0?}, 0xc0000ba618?, {0xc0000ba518?, 0xc0003d7600?, 0xc0000abd70?}, 0xc0?)
	/Users/khr/sandbox/ro/src/cmd/compile/internal/noder/stencil.go:1764 +0x39
cmd/compile/internal/noder.(*genInst).getDictOrSubdict(0x1f95aa0?, 0xc0003e0340?, {0x1a94718?, 0xc0003207e0?}, 0xc0000d53a8?, {0xc0000ba518, 0x1, 0x1}, 0x0?)
	/Users/khr/sandbox/ro/src/cmd/compile/internal/noder/stencil.go:601 +0xdc
cmd/compile/internal/noder.(*genInst).scanForGenCalls.func1({0x1a94718, 0xc0003207e0?})
	/Users/khr/sandbox/ro/src/cmd/compile/internal/noder/stencil.go:152 +0x32f
cmd/compile/internal/ir.Visit.func1({0x1a94718, 0xc0003207e0})
	/Users/khr/sandbox/ro/src/cmd/compile/internal/ir/visit.go:105 +0x30
cmd/compile/internal/ir.doNodes(...)
	/Users/khr/sandbox/ro/src/cmd/compile/internal/ir/node_gen.go:1512
cmd/compile/internal/ir.(*Func).doChildren(0x1a95078?, 0xc0000abad0?)
	/Users/khr/sandbox/ro/src/cmd/compile/internal/ir/func.go:152 +0x6e
cmd/compile/internal/ir.DoChildren(...)
	/Users/khr/sandbox/ro/src/cmd/compile/internal/ir/visit.go:94
cmd/compile/internal/ir.Visit.func1({0x1a95078, 0xc0003d7080})
	/Users/khr/sandbox/ro/src/cmd/compile/internal/ir/visit.go:106 +0x57
cmd/compile/internal/ir.Visit({0x1a95078, 0xc0003d7080}, 0xc0000bfbc0)
	/Users/khr/sandbox/ro/src/cmd/compile/internal/ir/visit.go:108 +0xb8
cmd/compile/internal/noder.(*genInst).scanForGenCalls(0x1f95aa0, {0x1a95078, 0xc0003d7080})
	/Users/khr/sandbox/ro/src/cmd/compile/internal/noder/stencil.go:133 +0x1f0
cmd/compile/internal/noder.(*genInst).buildInstantiations(0x1f95aa0)
	/Users/khr/sandbox/ro/src/cmd/compile/internal/noder/stencil.go:60 +0x69
cmd/compile/internal/noder.BuildInstantiations(...)
	/Users/khr/sandbox/ro/src/cmd/compile/internal/noder/stencil.go:44
cmd/compile/internal/noder.(*irgen).generate(0xc0002f6240, {0xc0000ba428, 0x1, 0x203000?})
	/Users/khr/sandbox/ro/src/cmd/compile/internal/noder/irgen.go:331 +0x3d1
cmd/compile/internal/noder.check2({0xc0000ba428, 0x1, 0x1})
	/Users/khr/sandbox/ro/src/cmd/compile/internal/noder/irgen.go:92 +0x16d
cmd/compile/internal/noder.LoadPackage({0xc0000c4070, 0x1, 0x0?})
	/Users/khr/sandbox/ro/src/cmd/compile/internal/noder/noder.go:90 +0x335
cmd/compile/internal/gc.Main(0x194d1c8)
	/Users/khr/sandbox/ro/src/cmd/compile/internal/gc/main.go:191 +0xb13
main.main()
	/Users/khr/sandbox/ro/src/cmd/compile/main.go:55 +0xdd