stack overflow when compiling interface containing type T struct { f *T } value

[slimsag]

While attempting to get Vecty compiling under TinyGo I ran into a problem which can be reduced to the following:

package main

func main() {
	Use(&T{})
}

type T struct {
	a *T
}

func Use(x interface{}) {}

When compiled under TinyGo 0.6.0, the compiler panics with:

runtime: goroutine stack exceeds 1000000000-byte limit
fatal error: stack overflow

runtime stack:
runtime.throw(0x346b0f9, 0xe)
        /usr/local/go/src/runtime/panic.go:617 +0x72
runtime.newstack()
        /usr/local/go/src/runtime/stack.go:1041 +0x6f0
runtime.morestack()
        /usr/local/go/src/runtime/asm_amd64.s:429 +0x8f

goroutine 1 [running]:
runtime.makeslice(0x33e0ac0, 0xd, 0x40, 0x0)
        /usr/local/go/src/runtime/slice.go:34 +0xf9 fp=0xc024000370 sp=0xc024000368 pc=0x8d9fa9
bytes.(*Buffer).grow(0xc000a099b0, 0xd, 0x0)
        /usr/local/go/src/bytes/buffer.go:131 +0x26b fp=0xc0240003c0 sp=0xc024000370 pc=0x90eaab
bytes.(*Buffer).WriteString(0xc000a099b0, 0x7fffef997f29, 0xd, 0x0, 0x0, 0x8)
        /usr/local/go/src/bytes/buffer.go:187 +0xe7 fp=0xc0240003f0 sp=0xc0240003c0 pc=0x90edd7
go/types.writePackage(0xc000a099b0, 0xc00029a910, 0x0)
        /usr/local/go/src/go/types/object.go:443 +0x64 fp=0xc024000430 sp=0xc0240003f0 pc=0xa33524
go/types.writeType(0xc000a099b0, 0x34e6540, 0xc0002a17d0, 0x0, 0xc0240005a8, 0x1, 0x8)
        /usr/local/go/src/go/types/typestring.go:233 +0xbda fp=0xc024000568 sp=0xc024000430 pc=0xa47cda
go/types.WriteType(...)
        /usr/local/go/src/go/types/typestring.go:75
go/types.TypeString(0x34e6540, 0xc0002a17d0, 0x0, 0x0, 0xc0000fe000)
        /usr/local/go/src/go/types/typestring.go:67 +0xb1 fp=0xc024000638 sp=0xc024000568 pc=0xa47061
go/types.(*Named).String(...)
        /usr/local/go/src/go/types/type.go:490
github.com/tinygo-org/tinygo/compiler.getTypeCodeName(0x34e6540, 0xc0002a17d0, 0xc000a09980, 0x30)
        /home/circleci/project/compiler/interface.go:63 +0x1010 fp=0xc0240007e8 sp=0xc024000638 pc=0xb9d0a0
github.com/tinygo-org/tinygo/compiler.getTypeCodeName(0x34e6580, 0xc00029c9a0, 0x1, 0xc000a03080)
        /home/circleci/project/compiler/interface.go:125 +0xe54 fp=0xc024000998 sp=0xc0240007e8 pc=0xb9cee4
github.com/tinygo-org/tinygo/compiler.getTypeCodeName(0x34e6540, 0xc0002a17d0, 0xc000a09950, 0x30)
        /home/circleci/project/compiler/interface.go:145 +0x54a fp=0xc024000b48 sp=0xc024000998 pc=0xb9c5da
github.com/tinygo-org/tinygo/compiler.getTypeCodeName(0x34e6580, 0xc00029c9a0, 0x1, 0xc000a03070)
        /home/circleci/project/compiler/interface.go:125 +0xe54 fp=0xc024000cf8 sp=0xc024000b48 pc=0xb9cee4
github.com/tinygo-org/tinygo/compiler.getTypeCodeName(0x34e6540, 0xc0002a17d0, 0xc000a09920, 0x30)
        /home/circleci/project/compiler/interface.go:145 +0x54a fp=0xc024000ea8 sp=0xc024000cf8 pc=0xb9c5da
github.com/tinygo-org/tinygo/compiler.getTypeCodeName(0x34e6580, 0xc00029c9a0, 0x1, 0xc000a03060)
        /home/circleci/project/compiler/interface.go:125 +0xe54 fp=0xc024001058 sp=0xc024000ea8 pc=0xb9cee4
github.com/tinygo-org/tinygo/compiler.getTypeCodeName(0x34e6540, 0xc0002a17d0, 0xc000a098f0, 0x30)
        /home/circleci/project/compiler/interface.go:145 +0x54a fp=0xc024001208 sp=0xc024001058 pc=0xb9c5da
github.com/tinygo-org/tinygo/compiler.getTypeCodeName(0x34e6580, 0xc00029c9a0, 0x1, 0xc000a03050)
        /home/circleci/project/compiler/interface.go:125 +0xe54 fp=0xc0240013b8 sp=0xc024001208 pc=0xb9cee4
[...]

[aykevl]

Thank you for the report! However, this bug has already been reported here:
#309