flyctl issue on 0.3.216: runtime error: invalid memory address or nil pointer dereference

[jmlacroix]

It started happening with 0.3.214, and we’re still having issue with the latest 0.3.216 version.

When we force version to 0.3.213, it works as expected.

Run superfly/flyctl-actions/setup-flyctl@master
Acquired 0.3.216 from https://github.com/superfly/flyctl/releases/download/v0.3.216/flyctl_0.3.216_Linux_x86_64.tar.gz
/usr/bin/tar xz --warning=no-unknown-keyword --overwrite -C /home/runner/work/_temp/0d9c63b6-db62-4d12-8166-82dab3a714c6 -f /home/runner/work/_temp/7e74800c-8547-4756-a90d-b0874e894263
Successfully cached flyctl to /opt/hostedtoolcache/flyctl/0.3.216/x86_64
Added flyctl to the path

[2025-11-14 18:52:21 +0000]   flyctl launch --yes         --name=pr-3503-xxxx --org=yyyy         --region=lhr         --dockerfile=deployment/Dockerfile         --ha=false         --build-only         --internal-port=80         --no-deploy         --vm-size=shared-cpu-4x         --vm-memory=4gb       
[2025-11-14 18:52:21 +0000] Error deploying review app
[2025-11-14 18:52:21 +0000] RuntimeError
[2025-11-14 18:52:21 +0000] Using dockerfile deployment/Dockerfile
Oops, something went wrong! Could you try that again?

runtime error: invalid memory address or nil pointer dereference
goroutine 1 [running]:
runtime/debug.Stack()
	/opt/hostedtoolcache/go/1.24.5/x64/src/runtime/debug/stack.go:26 +0x5e
github.com/superfly/flyctl/internal/sentry.printError({0x265d780, 0x448f2a0})
	/home/runner/work/flyctl/flyctl/internal/sentry/sentry.go:187 +0x16a
github.com/superfly/flyctl/internal/sentry.Recover({0x265d780, 0x448f2a0})
	/home/runner/work/flyctl/flyctl/internal/sentry/sentry.go:177 +0xb4
main.run.func1()
	/home/runner/work/flyctl/flyctl/main.go:40 +0x2f
panic({0x265d780?, 0x448f2a0?})
	/opt/hostedtoolcache/go/1.24.5/x64/src/runtime/panic.go:792 +0x132
go.opentelemetry.io/otel/sdk/trace.(*recordingSpan).End.deferwrap1()
	/home/runner/go/pkg/mod/go.opentelemetry.io/otel/sdk@v1.38.0/trace/span.go:468 +0x25
go.opentelemetry.io/otel/sdk/trace.(*recordingSpan).End(0xc00030b4a0, {0x0, 0x0, 0xc0005bd798?})
	/home/runner/go/pkg/mod/go.opentelemetry.io/otel/sdk@v1.38.0/trace/span.go:517 +0xc12
panic({0x265d780?, 0x448f2a0?})
	/opt/hostedtoolcache/go/1.24.5/x64/src/runtime/panic.go:792 +0x132
github.com/superfly/fly-go/flaps.(*Client).AppNameAvailable(0x0?, {0x2fb0310?, 0xc0006c05a0?}, {0x7ffda5e0700e?, 0xe?})
	/home/runner/go/pkg/mod/github.com/superfly/fly-go@v0.1.67/flaps/flaps_apps.go:76 +0x39
github.com/superfly/flyctl/internal/command/launch.appNameTaken({0x2fb0310, 0xc0006c05a0}, {0x7ffda5e0700e, 0xe})
	/home/runner/work/flyctl/flyctl/internal/command/launch/plan_builder.go:636 +0x85
github.com/superfly/flyctl/internal/command/launch.determineAppName({0x2fb0310, 0xc0006c05a0}, 0x0, 0xc000159a40, {0xc000444ab0, 0x30})
	/home/runner/work/flyctl/flyctl/internal/command/launch/plan_builder.go:608 +0x3bd
github.com/superfly/flyctl/internal/command/launch.buildManifest({0x2fb0310, 0xc0006c05a0}, 0x0, 0xc000879570)
	/home/runner/work/flyctl/flyctl/internal/command/launch/plan_builder.go:167 +0x3f5
github.com/superfly/flyctl/internal/command/launch.run({0x2fb0310, 0xc0006c05a0})
	/home/runner/work/flyctl/flyctl/internal/command/launch/cmd.go:354 +0x66e
github.com/superfly/flyctl/internal/command/launch.New.New.newRunE.func1(0xc000602308, {0xc00018d080?, 0x4?, 0x2a2cc86?})
	/home/runner/work/flyctl/flyctl/internal/command/command.go:147 +0x1ca
github.com/spf13/cobra.(*Command).execute(0xc000602308, {0xc00018cf20, 0xb, 0xb})
	/home/runner/go/pkg/mod/github.com/spf13/cobra@v1.9.1/command.go:1015 +0xaaa
github.com/spf13/cobra.(*Command).ExecuteC(0xc000222608)
	/home/runner/go/pkg/mod/github.com/spf13/cobra@v1.9.1/command.go:1148 +0x46f
github.com/spf13/cobra.(*Command).ExecuteContextC(...)
	/home/runner/go/pkg/mod/github.com/spf13/cobra@v1.9.1/command.go:1080
github.com/superfly/flyctl/internal/cli.Run({0x2fb0498?, 0xc0000f6b00?}, 0xc00075aa00, {0xc000114420, 0xc, 0xc})
	/home/runner/work/flyctl/flyctl/internal/cli/cli.go:95 +0x7d6
main.run()
	/home/runner/work/flyctl/flyctl/main.go:47 +0x150
main.main()
	/home/runner/work/flyctl/flyctl/main.go:26 +0x18

[Sam-Fly]

We’re taking a look. But yes, you should use v0.3.213 for now. You should be able to update your CI to pin that version using the download script using curl -L https://fly.io/install.sh | sh -s 0.3.213

[jmlacroix]

Thanks!

We’re using GitHub Actions with superfly/flyctl-actions, here’s the config to lock to the previous version in case it is useful to others:

  - uses: superfly/flyctl-actions/setup-flyctl@master
    with:
      version: 0.3.213

[Sam-Fly]

Thanks for sharing the proper config setting!

We’ve just revoked the 0.3.216 version, so the install script + GH action should be back to defaulting to 0.3.213. No harm in keeping it explicitly pinned for now though