invalid memory address or nil pointer dereference

[wanjianwei]

Describe the bug
Got error: "panic: runtime error: invalid memory address or nil pointer dereference" when i execute the script:
"swag init -d ./ -g router.go", the error trace is as follow:

goroutine 1 [running]:
github.com/swaggo/swag.getFuncDoc({0x100951dc0?, 0x140007a3c70?})
/Users/jway/Desktop/Dev/swag/parser.go:1062 +0x88
github.com/swaggo/swag.getFuncDoc({0x100951fc0?, 0x140007a9f00?})
/Users/jway/Desktop/Dev/swag/parser.go:1055 +0x138
github.com/swaggo/swag.(*Parser).ParseRouterAPIInfo(0x14000000ea0, 0x140007cef40)
/Users/jway/Desktop/Dev/swag/parser.go:1088 +0xbc
github.com/swaggo/swag.(*PackagesDefinitions).RangeFiles(0x140001b9350, 0x14001ceb488)
/Users/jway/Desktop/Dev/swag/packages.go:107 +0x2cc
github.com/swaggo/swag.(*Parser).ParseAPIMultiSearchDir(0x14000000ea0, {0x140001f63e0, 0x1, 0x0?}, {0x16fa7f753, 0xd}, 0x64)
/Users/jway/Desktop/Dev/swag/parser.go:457 +0x4a4
github.com/swaggo/swag/gen.(*Gen).Build(0x140001b9170, 0x140001f8000)
/Users/jway/Desktop/Dev/swag/gen/gen.go:221 +0x6a8
main.initAction(0x14000160420?)
/Users/jway/Desktop/Dev/swag/cmd/swag/main.go:243 +0x914
github.com/urfave/cli/v2.(*Command).Run(0x14000160420, 0x14000039d00, {0x140001cc370, 0x5, 0x5})
/Users/jway/go/pkg/mod/github.com/urfave/cli/[email protected]/command.go:276 +0x754
github.com/urfave/cli/v2.(*Command).Run(0x14000160840, 0x14000039bc0, {0x140000201e0, 0x6, 0x6})
/Users/jway/go/pkg/mod/github.com/urfave/cli/[email protected]/command.go:269 +0x964
github.com/urfave/cli/v2.(*App).RunContext(0x140001a6400, {0x1009cf058?, 0x100d50c80}, {0x140000201e0, 0x6, 0x6})
/Users/jway/go/pkg/mod/github.com/urfave/cli/[email protected]/app.go:333 +0x53c
github.com/urfave/cli/v2.(*App).Run(...)
/Users/jway/go/pkg/mod/github.com/urfave/cli/[email protected]/app.go:307
main.main()
/Users/jway/Desktop/Dev/swag/cmd/swag/main.go:333 +0x614
make: *** [swagger] Error 2

Your swag version
e.g. 1.16.4

Your go version
e.g. 1.21.12

Desktop (please complete the following information):

• OS: macos 12.4

[ubogdan]

As you may see in the release log, there are many PRs. It's a big surprise for me.
Can you please provide an annotation that generates this?

[YanShulinjj]

This panic is got when the req struct contains interface{} type, eg.type Req struct { data interface{} }

[ubogdan]

This is an OSS project. Any contribution is welcome.