[BUG]: crash while trying to apply "github_organization_custom_properties" and "github_repository_custom_property"

[C302]

Expected Behavior

That the provider works

Actual Behavior

Provider crashes

Terraform Version

2026-04-22T09:36:03.618Z [INFO] OpenTofu version: 1.10.6
2026-04-22T09:36:03.618Z [DEBUG] using github.com/hashicorp/go-tfe v1.53.0
2026-04-22T09:36:03.618Z [DEBUG] using github.com/opentofu/hcl/v2 v2.20.2-0.20250121132637-504036cd70e7
2026-04-22T09:36:03.619Z [DEBUG] using github.com/hashicorp/terraform-svchost v0.1.1
2026-04-22T09:36:03.619Z [DEBUG] using github.com/zclconf/go-cty v1.16.3
2026-04-22T09:36:03.619Z [INFO] Go runtime version: go1.24.6
2026-04-22T09:36:03.619Z [INFO] CLI args: []string{"/usr/bin/tofu", "--version"}
2026-04-22T09:36:03.619Z [DEBUG] Attempting to open CLI config file: /home/user/.terraformrc
2026-04-22T09:36:03.619Z [INFO] Loading CLI configuration from /home/user/.terraformrc
2026-04-22T09:36:03.619Z [DEBUG] Explicit provider installation configuration is set
2026-04-22T09:36:03.619Z [DEBUG] Found the config directory: /home/user/.terraform.d
2026-04-22T09:36:03.621Z [INFO] CLI command args: []string{"version", "--version"}
2026-04-22T09:36:03.629Z [DEBUG] Provider registry.opentofu.org/hashicorp/ad is overridden by dev_overrides
OpenTofu v1.10.6
on linux_amd64

• provider registry.opentofu.org/carlpett/sops v1.0.0
• provider registry.opentofu.org/integrations/github v6.11.1

Affected Resource(s)

• github_organization_custom_properties
• github_repository_custom_property

Terraform Configuration Files

Steps to Reproduce

No response

Debug Output

Stack trace from the terraform-provider-github_v6.11.1 plugin:

panic: runtime error: index out of range [0] with length 0

goroutine 80 [running]:
github.com/integrations/terraform-provider-github/v6/github.resourceGithubRepositoryCustomPropertyCreate(0xc000176480, {0xebf600, 0xc000a1c140})
        github.com/integrations/terraform-provider-github/v6/github/resource_github_repository_custom_property.go:72 +0x698
github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema.(*Resource).create(0x12a5938?, {0x12a5938?, 0xc0008c0bd0?}, 0xd?, {0xebf600?, 0xc000a1c140?})
        github.com/hashicorp/terraform-plugin-sdk/v2@v2.38.1/helper/schema/resource.go:837 +0x15f
github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema.(*Resource).Apply(0xc000492800, {0x12a5938, 0xc0008c0bd0}, 0xc0001389c0, 0xc000176360, {0xebf600, 0xc000a1c140})
        github.com/hashicorp/terraform-plugin-sdk/v2@v2.38.1/helper/schema/resource.go:980 +0xb47
github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema.(*GRPCProviderServer).ApplyResourceChange(0xc000376510, {0x12a5938?, 0xc0008c0b10?}, 0xc000a5e190)
        github.com/hashicorp/terraform-plugin-sdk/v2@v2.38.1/helper/schema/grpc_provider.go:1499 +0x1085
github.com/hashicorp/terraform-plugin-go/tfprotov5/tf5server.(*server).ApplyResourceChange(0xc00027bae0, {0x12a5938?, 0xc00063a960?}, 0xc0003d6600)
        github.com/hashicorp/terraform-plugin-go@v0.29.0/tfprotov5/tf5server/server.go:944 +0x3b9
github.com/hashicorp/terraform-plugin-go/tfprotov5/internal/tfplugin5._Provider_ApplyResourceChange_Handler({0x10e91e0, 0xc00027bae0}, {0x12a5938, 0xc00063a960}, 0xc0003d6480, 0x0)
        github.com/hashicorp/terraform-plugin-go@v0.29.0/tfprotov5/internal/tfplugin5/tfplugin5_grpc.pb.go:789 +0x1a6
google.golang.org/grpc.(*Server).processUnaryRPC(0xc00026a200, {0x12a5938, 0xc00063a8d0}, 0xc000116240, 0xc0004e1ad0, 0x1a7aca8, 0x0)
        google.golang.org/grpc@v1.75.1/server.go:1431 +0x1036
google.golang.org/grpc.(*Server).handleStream(0xc00026a200, {0x12a6278, 0xc000536340}, 0xc000116240)
        google.golang.org/grpc@v1.75.1/server.go:1842 +0xb88
google.golang.org/grpc.(*Server).serveStreams.func2.1()
        google.golang.org/grpc@v1.75.1/server.go:1061 +0x7f
created by google.golang.org/grpc.(*Server).serveStreams.func2 in goroutine 66
        google.golang.org/grpc@v1.75.1/server.go:1072 +0x11d

Error: The terraform-provider-github_v6.11.1 plugin crashed!

This is always indicative of a bug within the plugin. It would be immensely
helpful if you could report the crash with the plugin's maintainers so that it
can be fixed. The output above should help diagnose the issue.

2026-04-22T09:26:00.049Z [DEBUG] provider: plugin exited

Panic Output

Code of Conduct

• I agree to follow this project's Code of Conduct

[github-actions]

👋 Hi! Thank you for this contribution! Just to let you know, our GitHub SDK team does a round of issue and PR reviews twice a week, every Monday and Friday! We have a process in place for prioritizing and responding to your input. Because you are a part of this community please feel free to comment, add to, or pick up any issues/PRs that are labeled with Status: Up for grabs. You & others like you are the reason all of this works! So thank you & happy coding! 🚀

[deiga]

Please provide an example terraform config and the whole output of TF_LOG=DEBUG terraform apply

[C302]

Ok, while digging a bit deeper i found following things:

github_organization_custom_properties

We also need the "Administrative" permission set to R/W in the "Organisation permissions", we only had set the "Custom properties to R/W", this was not immediately clear from the TF provider docs, but we could find this doc in the GH REST API docs

github_repository_custom_property

Setting the custom property-string to "" results indeed in a crash

we could continue with some work-arounds thx to the info we received from the GH API while setting the log to DEBUG