avoid panic when masked parent is missing (dagger#7227)

Signed-off-by: Alex Suraci <[email protected]>

dagql/idtui/types.go

@@ -4,6 +4,7 @@ import (
  "sort"
  "time"
 
+ "github.com/dagger/dagger/engine/slog"
  sdktrace "go.opentelemetry.io/otel/sdk/trace"
  "go.opentelemetry.io/otel/trace"
 )
@@ -49,7 +50,17 @@ func CollectSpans(db *DB, traceID trace.TraceID) []*Span {
  continue
  }
  if span.Mask && span.Parent().IsValid() {
- db.Spans[span.Parent().SpanID()].Passthrough = true
+ masked := db.Spans[span.Parent().SpanID()]
+ if masked != nil {
+ masked.Passthrough = true
+ } else {
+ // FIXME(vito): still investigating why this happens, but in
+ // the mean time, better not to panic
+ slog.Warn("masked parent span not found; possible data loss?",
+ "traceID", traceID,
+ "spanID", span.SpanContext().SpanID(),
+ "parentID", span.Parent().SpanID())
+ }
  }
  spans = append(spans, span)
  }