panic: hash of unhashable type #1131
Description
How do you use Sentry?
Sentry SaaS (sentry.io)
SDK version
v0.36.2
Go version
1.25.3
Are you using Go Modules?
yes
Steps to reproduce
Sentry panics when logging an unhashable error. Looking at the traceback, I believe that the panic comes from the following code in exception.go:
if t.Comparable() {
if _, ok := v.comparable[err]; ok { // <- panics here
return true
}
v.comparable[err] = struct{}{}
return false
}According to the docs for reflect.Type.Comparable:
// Even if Comparable returns true, the comparison may still panic.
// For example, values of interface type are comparable,
// but the comparison will panic if their dynamic type is not comparable.I'm still working on a minimal reproducible example.
Expected result
no panic 🙃
Actual result
2025/11/11 09:14:45 http: panic serving 172.18.0.1:59848: hash of unhashable type: valdo.Errors
goroutine 55 [running]:
net/http.(*conn).serve.func1()
/usr/local/go/src/net/http/server.go:1943 +0xd3
panic({0x16597c0?, 0x1708b80?})
/usr/local/go/src/runtime/panic.go:783 +0x132
go.opentelemetry.io/otel/sdk/trace.(*recordingSpan).End.deferwrap1()
/go/pkg/mod/go.opentelemetry.io/otel/sdk@v1.38.0/trace/span.go:468 +0x25
go.opentelemetry.io/otel/sdk/trace.(*recordingSpan).End(0xc0017043c0, {0x0, 0x0, 0xc0018261c0?})
/go/pkg/mod/go.opentelemetry.io/otel/sdk@v1.38.0/trace/span.go:517 +0xbf2
panic({0x16597c0?, 0x1708b80?})
/usr/local/go/src/runtime/panic.go:783 +0x132
github.com/ourmindbv/ourmind-backend/ourmind.recoverWithSentry(0xc001d06720, 0xc00172f680)
/app/ourmind/sentry.go:52 +0x9c
panic({0x16597c0?, 0x1708b80?})
/usr/local/go/src/runtime/panic.go:783 +0x132
github.com/getsentry/sentry-go.(*visited).seenError(0xc00284dd90, {0x78c5935a3370, 0xc00277eb70})
/go/pkg/mod/github.com/getsentry/sentry-go@v0.36.2/exception.go:28 +0x7f
github.com/getsentry/sentry-go.convertErrorDFS({0x78c5935a3370, 0xc00277eb70}, 0xc00284dd18, 0x0, {0x0, 0x0}, 0xc00284dd90, 0x64, 0x0)
/go/pkg/mod/github.com/getsentry/sentry-go@v0.36.2/exception.go:75 +0x91
github.com/getsentry/sentry-go.convertErrorToExceptions({0x78c5935a3370, 0xc00277eb70}, 0x64)
/go/pkg/mod/github.com/getsentry/sentry-go@v0.36.2/exception.go:49 +0x196
github.com/getsentry/sentry-go.(*Event).SetException(...)
/go/pkg/mod/github.com/getsentry/sentry-go@v0.36.2/interfaces.go:416
github.com/getsentry/sentry-go/slog.DefaultConverter(0x1, 0x0, {0xc001816b60?, 0x16bf2a0?, 0xc00284e628?}, {0xa57c820?, 0x0?, 0x0?}, 0xc001870480, 0xc001d06720)
/go/pkg/mod/github.com/getsentry/sentry-go/slog@v0.36.2/converter.go:54 +0x498
github.com/getsentry/sentry-go/slog.(*eventHandler).Handle(_, {_, _}, {{0xc23cdd815177b74d, 0x17d3618de, 0xa55a6a0}, {0x182d60a, 0x29}, 0x4, 0x132b956, ...})
/go/pkg/mod/github.com/getsentry/sentry-go/slog@v0.36.2/sentryslog.go:190 +0x343
github.com/getsentry/sentry-go/slog.(*SentryHandler).Handle(_, {_, _}, {{0xc23cdd815177b74d, 0x17d3618de, 0xa55a6a0}, {0x182d60a, 0x29}, 0x4, 0x132b956, ...})
/go/pkg/mod/github.com/getsentry/sentry-go/slog@v0.36.2/sentryslog.go:142 +0x9b
github.com/ourmindbv/ourmind-backend/ourmind.(*chainHandler).Handle(_, {_, _}, {{0xc23cdd815177b74d, 0x17d3618de, 0xa55a6a0}, {0x182d60a, 0x29}, 0x4, 0x132b956, ...})
...
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