Welcome!
Component
Hub
Problem Description
During the Nix build process on Apple Silicon (Darwin/ARM64), the test suite for github.com/henrygd/beszel/internal/alerts consistently fails with a nil pointer dereference.
The panic occurs in a background goroutine started by StartUpdater. The stack trace shows it failing inside the PocketBase RecordQuery core. Interestingly, this issue does not seem to reproduce on x86_64 Linux/Darwin builds, suggesting a potential race condition that is more susceptible to the ARM memory model or specific to how Nix handles ARM sandboxing.
I have found that wrapping the logic in a recover() allows the build to finish, but the underlying nil dereference in getRecord needs an architectural fix.
postPatch = ''
substituteInPlace internal/hub/systems/system.go \
--replace-fail "func (sys *System) StartUpdater() {" "func (sys *System) StartUpdater() { defer func() { recover() }();"
'';Expected Behavior
The test suite should complete without a runtime panic. The StartUpdater function should safely handle cases where the underlying PocketBase app or record is not available.
Steps to Reproduce
Run nix build -L nixpkgs#beszel on an Apple-Silicon device.
It will fail with the following error message:
beszel> Running phase: checkPhase
beszel> ok github.com/henrygd/beszel/agent 1.782s
beszel> ok github.com/henrygd/beszel/agent/deltatracker 0.328s
beszel> ok github.com/henrygd/beszel/agent/health 0.357s
beszel> ok github.com/henrygd/beszel/agent/utils 0.331s
beszel> panic: runtime error: invalid memory address or nil pointer dereference
beszel> [signal SIGSEGV: segmentation violation code=0x2 addr=0xb0 pc=0x101467140]
beszel>
beszel> goroutine 38652 [running]:
beszel> github.com/pocketbase/pocketbase/core.(*BaseApp).RecordQuery(0x6d7eee754008, {0x102a41b40?, 0x6d7eee446008?})
beszel> /nix/var/nix/builds/nix-71066-3105078627/source/vendor/github.com/pocketbase/pocketbase/core/record_query.go:38 +0x70
beszel> github.com/pocketbase/pocketbase/core.(*BaseApp).FindRecordById(0x6d7eee754008, {0x1028b7480?, 0x102a76260?}, {0x6d7eedefeee0, 0xf}, {0x0, 0x0, 0x1015f1d58?})
beszel> /nix/var/nix/builds/nix-71066-3105078627/source/vendor/github.com/pocketbase/pocketbase/core/record_query.go:223 +0x78
beszel> github.com/henrygd/beszel/internal/hub/systems.(*System).getRecord(0x6d7eee63f0a0)
beszel> /nix/var/nix/builds/nix-71066-3105078627/source/internal/hub/systems/system.go:347 +0x50
beszel> github.com/henrygd/beszel/internal/hub/systems.(*System).setDown(0x6d7eee63f0a0, {0x102a7d940, 0x6d7eee692550})
beszel> /nix/var/nix/builds/nix-71066-3105078627/source/internal/hub/systems/system.go:362 +0x94
beszel> github.com/henrygd/beszel/internal/hub/systems.(*System).StartUpdater(0x6d7eee63f0a0)
beszel> /nix/var/nix/builds/nix-71066-3105078627/source/internal/hub/systems/system.go:88 +0xc4
beszel> created by github.com/henrygd/beszel/internal/hub/systems.(*SystemManager).AddSystem in goroutine 37891
beszel> /nix/var/nix/builds/nix-71066-3105078627/source/internal/hub/systems/system_manager.go:253 +0x17c
beszel> FAIL github.com/henrygd/beszel/internal/alerts 63.711s
beszel> FAIL
OS / Architecture
MacOS/arm
Beszel version
0.18.7
Installation method
Nix
Configuration
Hub Logs
Agent Logs
Welcome!
Component
Hub
Problem Description
During the Nix build process on Apple Silicon (Darwin/ARM64), the test suite for
github.com/henrygd/beszel/internal/alertsconsistently fails with a nil pointer dereference.The panic occurs in a background goroutine started by
StartUpdater. The stack trace shows it failing inside the PocketBaseRecordQuerycore. Interestingly, this issue does not seem to reproduce on x86_64 Linux/Darwin builds, suggesting a potential race condition that is more susceptible to the ARM memory model or specific to how Nix handles ARM sandboxing.I have found that wrapping the logic in a
recover()allows the build to finish, but the underlying nil dereference ingetRecordneeds an architectural fix.Expected Behavior
The test suite should complete without a runtime panic. The
StartUpdaterfunction should safely handle cases where the underlying PocketBase app or record is not available.Steps to Reproduce
Run
nix build -L nixpkgs#beszelon an Apple-Silicon device.It will fail with the following error message:
OS / Architecture
MacOS/arm
Beszel version
0.18.7
Installation method
Nix
Configuration
Hub Logs
Agent Logs