crash with --v3.1 when generating

[bernhardreiter]

Runtime error: invalid memory address or nil pointer dereference
occurs when trying

swag init -g docs.go --parseDependency --parseInternal --v3.1

To reproduce

1. Checkout 04a42cfacf87cb9bae4cdca708c4f4ee76dd6a6b of https://github.com/ISDuBA/ISDuBA
2. cd into directory
3. run `go generate ./..' or cd into pkg/web and run the above command.
4. See error

Expected behavior
No crash. The openapi file gets generated.

Your swag version
2.0.0-rc4

Your go version
go1.24.0 linux/amd64

Additional context
Removing file https://github.com/ISDuBA/ISDuBA/blob/04a42cfacf87cb9bae4cdca708c4f4ee76dd6a6b/pkg/web/sources.go
from the directory will remove the crash, giving the log it seems that the struct sourceAge is cause of the problem.

Here is a full log

~/isduba-git/pkg/web$ swag init -g docs.go --parseDependency --parseInternal --v3.1
Swag version:  v2.0.0
2025/02/14 21:15:50 Generate swagger docs....
2025/02/14 21:15:50 Generate general API Info, search dir:./
get pkg name for directory: ./
2025/02/14 21:15:54 warning: failed to evaluate const mProfCycleWrap at /usr/local/go/src/runtime/mprof.go:179:7, reflect: call of reflect.Value.Len on zero Value
2025/02/14 21:15:54 Generating web.about.info
2025/02/14 21:15:54 Generating models.PublishersTLPs
2025/02/14 21:15:54 Generating models.TLP
2025/02/14 21:15:54 Generating config.Client
2025/02/14 21:15:54 Generating time.Duration
2025/02/14 21:15:54 Generating models.Success
2025/02/14 21:15:54 Generating models.Error
2025/02/14 21:15:54 Generating web.advisoryStates
2025/02/14 21:15:54 Generating models.AdvisoryState
2025/02/14 21:15:54 Generating models.Workflow
2025/02/14 21:15:54 Generating web.viewEvents.event
2025/02/14 21:15:54 Generating models.Event
2025/02/14 21:15:54 Generating web.argumentedAggregator
2025/02/14 21:15:54 Generating encoding_json.RawMessage
2025/02/14 21:15:54 Generating web.custom
2025/02/14 21:15:54 Generating sources.SourceSubscriptions
2025/02/14 21:15:54 Generating sources.SourceSubscription
2025/02/14 21:15:54 Generating sources.FeedSubscription
2025/02/14 21:15:54 Generating web.viewAggregators.aggregator
2025/02/14 21:15:54 Generating models.ID
2025/02/14 21:15:54 Generating web.createComment.commentResult
2025/02/14 21:15:54 Generating sql.NullString
2025/02/14 21:15:54 Generating web.comment
2025/02/14 21:15:54 Generating forwarder.ForwardTarget
2025/02/14 21:15:54 Generating web.overviewDocuments.documentResult
2025/02/14 21:15:54 Generating web.overviewEvents.events
2025/02/14 21:15:54 Generating models.StoredQuery
2025/02/14 21:15:54 Generating query.ParserMode
2025/02/14 21:15:54 Generating models.WorkflowRole
2025/02/14 21:15:54 Generating web.createStoredQuery.createResult
2025/02/14 21:15:54 Generating web.updateOrder.queryOrder
2025/02/14 21:15:54 Generating web.insertDefaultQueryExclusion.createResult
2025/02/14 21:15:54 Generating web.viewSources.sourcesResult
2025/02/14 21:15:54 Generating web.source
2025/02/14 21:15:54 Generating web.sourceAge
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x2b8 pc=0x8ff482]

goroutine 1 [running]:
github.com/swaggo/swag/v2.(*Parser).parseStructFieldV3(0xc00026ca00, 0xc0002ca6e0, 0xc000489a00)
        /home/ber/go/pkg/mod/github.com/swaggo/swag/[email protected]/parserv3.go:1006 +0x482
github.com/swaggo/swag/v2.(*Parser).parseStructV3(0xc00026ca00, 0xc0002ca6e0, 0xc0004ac120)
        /home/ber/go/pkg/mod/github.com/swaggo/swag/[email protected]/parserv3.go:885 +0xca
github.com/swaggo/swag/v2.(*Parser).parseTypeExprV3(0xc00026ca00, 0xb824ac?, {0xc6e420?, 0xc0004b20c0?}, 0x30?)
        /home/ber/go/pkg/mod/github.com/swaggo/swag/[email protected]/parserv3.go:808 +0x447
github.com/swaggo/swag/v2.(*Parser).ParseDefinitionV3(0xc00026ca00, 0xc00fe9c9c0)
        /home/ber/go/pkg/mod/github.com/swaggo/swag/[email protected]/parserv3.go:718 +0x405
github.com/swaggo/swag/v2.(*Parser).getTypeSchemaV3(0xc00026ca00, {0xc000487010, 0x6}, 0xc0002ca6e0, 0x1)
        /home/ber/go/pkg/mod/github.com/swaggo/swag/[email protected]/parserv3.go:669 +0xa06
github.com/swaggo/swag/v2.(*Parser).parseTypeExprV3(0xc00026ca00, 0xc010c086b8?, {0xc6e2d0?, 0xc0004afd00?}, 0xf6?)
        /home/ber/go/pkg/mod/github.com/swaggo/swag/[email protected]/parserv3.go:812 +0x3c7
github.com/swaggo/swag/v2.(*Parser).parseTypeExprV3(0xc00026ca00, 0x8cdc47?, {0xc6e330?, 0xc0004b26f0?}, 0x30?)
        /home/ber/go/pkg/mod/github.com/swaggo/swag/[email protected]/parserv3.go:820 +0x425
github.com/swaggo/swag/v2.(*Parser).parseTypeExprV3(0xc00026ca00, 0xc6e360?, {0xc6e360?, 0xc0004acab0}, 0x0?)
        /home/ber/go/pkg/mod/github.com/swaggo/swag/[email protected]/parserv3.go:834 +0x5f1
github.com/swaggo/swag/v2.(*Parser).parseStructFieldV3(0xc00026ca00, 0xc0002ca6e0, 0xc0004b4800)
        /home/ber/go/pkg/mod/github.com/swaggo/swag/[email protected]/parserv3.go:980 +0x354
github.com/swaggo/swag/v2.(*Parser).parseStructV3(0xc00026ca00, 0xc0002ca6e0, 0xc0004acae0)
        /home/ber/go/pkg/mod/github.com/swaggo/swag/[email protected]/parserv3.go:885 +0xca
github.com/swaggo/swag/v2.(*Parser).parseTypeExprV3(0xc00026ca00, 0xb824ac?, {0xc6e420?, 0xc0004b2708?}, 0x20?)
        /home/ber/go/pkg/mod/github.com/swaggo/swag/[email protected]/parserv3.go:808 +0x447
github.com/swaggo/swag/v2.(*Parser).ParseDefinitionV3(0xc00026ca00, 0xc00fe9cae0)
        /home/ber/go/pkg/mod/github.com/swaggo/swag/[email protected]/parserv3.go:718 +0x405
github.com/swaggo/swag/v2.(*Parser).getTypeSchemaV3(0xc00026ca00, {0xc000436b9a, 0x1d}, 0xc0002ca6e0, 0x1)
        /home/ber/go/pkg/mod/github.com/swaggo/swag/[email protected]/parserv3.go:669 +0xa06
github.com/swaggo/swag/v2.parseObjectSchemaV3(0xc00026ca00, {0xc000436b9a, 0x1d}, 0xc0002ca6e0)
        /home/ber/go/pkg/mod/github.com/swaggo/swag/[email protected]/operationv3.go:851 +0xf9d
github.com/swaggo/swag/v2.(*OperationV3).parseObjectSchema(...)
        /home/ber/go/pkg/mod/github.com/swaggo/swag/[email protected]/operationv3.go:791
github.com/swaggo/swag/v2.(*OperationV3).parseAPIObjectSchema(0xc0106dfc00, {0xc000436b8d, 0x2a}, {0xc000436b92, 0x6}, {0xc000436b9a, 0x1d}, 0xc0002ca6e0)
        /home/ber/go/pkg/mod/github.com/swaggo/swag/[email protected]/operationv3.go:705 +0x446
github.com/swaggo/swag/v2.(*OperationV3).ParseResponseComment(0xc0106dfc00, {0xc000436b8d, 0x2a}, 0xc0002ca6e0)
        /home/ber/go/pkg/mod/github.com/swaggo/swag/[email protected]/operationv3.go:939 +0x13d
github.com/swaggo/swag/v2.(*OperationV3).ParseComment(0xc0106dfc00, {0xc000436b80?, 0x1?}, 0xc0002ca6e0)
        /home/ber/go/pkg/mod/github.com/swaggo/swag/[email protected]/operationv3.go:88 +0x329
github.com/swaggo/swag/v2.(*Parser).ParseRouterAPIInfoV3(0xc00026ca00, 0xc0004e8900)
        /home/ber/go/pkg/mod/github.com/swaggo/swag/[email protected]/parserv3.go:514 +0x1b1
github.com/swaggo/swag/v2.(*PackagesDefinitions).RangeFiles(0xc00030aa50, 0xc010c09508)
        /home/ber/go/pkg/mod/github.com/swaggo/swag/[email protected]/packages.go:107 +0x33c
github.com/swaggo/swag/v2.(*Parser).ParseAPIMultiSearchDir(0xc00026ca00, {0xc0003151f0, 0x1, 0x0?}, {0x7ffeff50b5e3, 0x7}, 0x64)
        /home/ber/go/pkg/mod/github.com/swaggo/swag/[email protected]/parser.go:499 +0x63a
github.com/swaggo/swag/v2/gen.(*Gen).Build(0xc00030a750, 0xc000238180)
        /home/ber/go/pkg/mod/github.com/swaggo/swag/[email protected]/gen/gen.go:233 +0x7aa
main.initAction(0xc00027a100)
        /home/ber/go/pkg/mod/github.com/swaggo/swag/[email protected]/cmd/swag/main.go:249 +0xa08
github.com/urfave/cli/v2.(*Command).Run(0xc000248420, 0xc00027a100, {0xc000180960, 0x6, 0x6})
        /home/ber/go/pkg/mod/github.com/urfave/cli/[email protected]/command.go:274 +0x77b
github.com/urfave/cli/v2.(*Command).Run(0xc000248840, 0xc00019bf40, {0xc000138000, 0x7, 0x7})
        /home/ber/go/pkg/mod/github.com/urfave/cli/[email protected]/command.go:267 +0x9fc
github.com/urfave/cli/v2.(*App).RunContext(0xc000276000, {0xc6f4c8, 0x1126920}, {0xc000138000, 0x7, 0x7})
        /home/ber/go/pkg/mod/github.com/urfave/cli/[email protected]/app.go:332 +0x566
github.com/urfave/cli/v2.(*App).Run(...)
        /home/ber/go/pkg/mod/github.com/urfave/cli/[email protected]/app.go:309
main.main()
        /home/ber/go/pkg/mod/github.com/swaggo/swag/[email protected]/cmd/swag/main.go:341 +0x5d8