V2: Segmentation Error When using Slice as a type for generic (Wrapper[[]T]) in -v3.1

[OnFireByte]

Describe the bug
In v3.1 mode, if the return object is in generic form with slice as a generic argument (ex. Wrapper[[]Data]), it will cause the program to crash by segmentation error.

This problem seem to not occur in swagger-v2 mode, and -v3.1 mode in rc3.

To Reproduce

1. Create a new route with generic type as a return type

type WithData[T any] struct {
	Data T `json:"data"`
}

type Foo struct {
	Bar string `json:"bar"`
	Baz int    `json:"baz"`
}

// @Summary		Get Foo
// @Router			/foo [get]
// @Success		200			{object}	WithData[[]Foo]
func GetFoo() {}

2. Run swag init -v3.1 -g ./main.go
3. See error

Expected behavior
To run successfully

Screenshots

❯ swag init -v3.1 -g ./cmd/api/main.go 
Swag version:  v2.0.0
2024/12/04 22:20:54 Generate swagger docs....
2024/12/04 22:20:54 Generate general API Info, search dir:./
get pkg name for directory: ./
2024/12/04 22:20:54 warning: failed to get package name in dir: ./, error: execute go list command, exit status 1, stdout:, stderr:no Go files in /Users/byte/playground/go/swag
@host is deprecated use servers instead
@basepath is deprecated use servers instead
2024/12/04 22:20:54 Generating main.WithData-array_main_Foo
2024/12/04 22:20:54 Generating array_main.Foo
2024/12/04 22:20:54 Generating main.Foo
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x2 addr=0x18 pc=0x104a73848]

goroutine 1 [running]:
github.com/swaggo/swag/v2.fillDefinitionDescriptionV3(0x1400021adc0, 0x14000200f08, 0x104d5d9e0?, 0x14000135260)
	/Users/byte/go/pkg/mod/github.com/swaggo/swag/[email protected]/parserv3.go:768 +0x28
github.com/swaggo/swag/v2.(*Parser).ParseDefinitionV3(0x1400021adc0, 0x14000135260)
	/Users/byte/go/pkg/mod/github.com/swaggo/swag/[email protected]/parserv3.go:725 +0x3c8
github.com/swaggo/swag/v2.(*Parser).getTypeSchemaV3(0x1400021adc0, {0x14000243d90, 0xe}, 0x1400020fa40, 0x1)
	/Users/byte/go/pkg/mod/github.com/swaggo/swag/[email protected]/parserv3.go:669 +0xa88
github.com/swaggo/swag/v2.(*Parser).parseStructFieldV3(0x1400021adc0, 0x1400020fa40, 0x1400022fc40)
	/Users/byte/go/pkg/mod/github.com/swaggo/swag/[email protected]/parserv3.go:973 +0x324
github.com/swaggo/swag/v2.(*Parser).parseStructV3(0x1400021adc0, 0x1400020fa40, 0x14000223a70)
	/Users/byte/go/pkg/mod/github.com/swaggo/swag/[email protected]/parserv3.go:885 +0xac
github.com/swaggo/swag/v2.(*Parser).parseTypeExprV3(0x1400021adc0, 0x104b43ad8?, {0x104d5daa0?, 0x14000125c98?}, 0xe0?)
	/Users/byte/go/pkg/mod/github.com/swaggo/swag/[email protected]/parserv3.go:808 +0x8c8
github.com/swaggo/swag/v2.(*Parser).ParseDefinitionV3(0x1400021adc0, 0x140001352c0)
	/Users/byte/go/pkg/mod/github.com/swaggo/swag/[email protected]/parserv3.go:718 +0x3a4
github.com/swaggo/swag/v2.(*Parser).getTypeSchemaV3(0x1400021adc0, {0x1400014476c, 0xf}, 0x1400020fa40, 0x1)
	/Users/byte/go/pkg/mod/github.com/swaggo/swag/[email protected]/parserv3.go:669 +0xa88
github.com/swaggo/swag/v2.parseObjectSchemaV3(0x1400021adc0, {0x1400014476c, 0xf}, 0x1400020fa40)
	/Users/byte/go/pkg/mod/github.com/swaggo/swag/[email protected]/operationv3.go:851 +0x1068
github.com/swaggo/swag/v2.(*OperationV3).parseObjectSchema(...)
	/Users/byte/go/pkg/mod/github.com/swaggo/swag/[email protected]/operationv3.go:791
github.com/swaggo/swag/v2.(*OperationV3).parseAPIObjectSchema(0x140001c0600, {0x1400014475d, 0x1e}, {0x14000144764, 0x6}, {0x1400014476c, 0xf}, 0x1400020fa40)
	/Users/byte/go/pkg/mod/github.com/swaggo/swag/[email protected]/operationv3.go:705 +0x3bc
github.com/swaggo/swag/v2.(*OperationV3).ParseResponseComment(0x140001c0600, {0x1400014475d, 0x1e}, 0x1400020fa40)
	/Users/byte/go/pkg/mod/github.com/swaggo/swag/[email protected]/operationv3.go:939 +0x110
github.com/swaggo/swag/v2.(*OperationV3).ParseComment(0x140001c0600, {0x14000144750?, 0x1?}, 0x1400020fa40)
	/Users/byte/go/pkg/mod/github.com/swaggo/swag/[email protected]/operationv3.go:88 +0x374
github.com/swaggo/swag/v2.(*Parser).ParseRouterAPIInfoV3(0x1400021adc0, 0x1400022f380)
	/Users/byte/go/pkg/mod/github.com/swaggo/swag/[email protected]/parserv3.go:514 +0x194
github.com/swaggo/swag/v2.(*PackagesDefinitions).RangeFiles(0x140002225d0, 0x140001a14d0)
	/Users/byte/go/pkg/mod/github.com/swaggo/swag/[email protected]/packages.go:107 +0x2cc
github.com/swaggo/swag/v2.(*Parser).ParseAPIMultiSearchDir(0x1400021adc0, {0x14000240ab0, 0x1, 0x0?}, {0x16b81707b, 0x11}, 0x64)
	/Users/byte/go/pkg/mod/github.com/swaggo/swag/[email protected]/parser.go:499 +0x4ac
github.com/swaggo/swag/v2/gen.(*Gen).Build(0x140002222d0, 0x14000246000)
	/Users/byte/go/pkg/mod/github.com/swaggo/swag/[email protected]/gen/gen.go:233 +0x6a4
main.initAction(0x1400022e080)
	/Users/byte/go/pkg/mod/github.com/swaggo/swag/[email protected]/cmd/swag/main.go:249 +0x7f8
github.com/urfave/cli/v2.(*Command).Run(0x140001d4420, 0x1400022e080, {0x1400022e0c0, 0x4, 0x4})
	/Users/byte/go/pkg/mod/github.com/urfave/cli/[email protected]/command.go:274 +0x6fc
github.com/urfave/cli/v2.(*Command).Run(0x140001d4840, 0x1400015de80, {0x14000140000, 0x5, 0x5})
	/Users/byte/go/pkg/mod/github.com/urfave/cli/[email protected]/command.go:267 +0x8f8
github.com/urfave/cli/v2.(*App).RunContext(0x14000224000, {0x104d5ed18, 0x1051b9140}, {0x14000140000, 0x5, 0x5})
	/Users/byte/go/pkg/mod/github.com/urfave/cli/[email protected]/app.go:332 +0x4f8
github.com/urfave/cli/v2.(*App).Run(...)
	/Users/byte/go/pkg/mod/github.com/urfave/cli/[email protected]/app.go:309
main.main()
	/Users/byte/go/pkg/mod/github.com/swaggo/swag/[email protected]/cmd/swag/main.go:341 +0x594

Your swag version
v2.0.0-rc4

Your go version
e.g. 1.22.5

Desktop (please complete the following information):

• OS: MacOS 14.2.1
• Version: 14.2.1

Additional context
Add any other context about the problem here.