Uzair Nawaz

Solves #5940 Existing tcp e2e tests use a time.Sleep call to guarantee that all spawned goroutines get cleaned up before running a leak check. This PR instead uses synctest.Test on...

[checklocks] Use function line info for error messages when return instruction has no line numbers attached

2

Resolves line information issues described by #11203 For functions that don't include explicit return statements in the Go source code, the ssa package inserts return instructions without line information attached,...