go tool trace is broken, "failed to parse any useful part of the trace: misuse of region in goroutine"

[tiancaiamao]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

start tidb, run some workload

then use the trace tool

curl 'http://127.0.0.1:10080/debug/pprof/trace?seconds=3' > trace.out
go tool trace -http=:6062 trace.out 
2024/12/18 11:29:22 Preparing trace for viewer...
failed to parse any useful part of the trace: misuse of region in goroutine 387: region end {228 pdclient.tsoReqSend} when the inner-most active region start event is {0 pdclient.tsoReqSend}

2. What did you expect to see? (Required)

go tool trace works.

3. What did you see instead (Required)

It's broken.

failed to parse any useful part of the trace: misuse of region in goroutine 387: region end {228 pdclient.tsoReqSend} when the inner-most active region start event is {0 pdclient.tsoReqSend}

4. What is your TiDB version? (Required)