Simon Jakobi pushed to branch wip/sjakobi/testsuite-atomic-output at Glasgow Haskell Compiler / GHC Commits: 9dc76830 by Simon Jakobi at 2026-06-11T08:45:04+02:00 testsuite: Give each test's output block a header A test's output is now emitted as one contiguous block (see Note [Atomic test output]), but adjacent blocks had no demarcation, so e.g. a one-line message from a passing test visually attached itself to a neighbouring test's failure diff. Prefix each non-empty block with a header naming the test and follow it with a blank line. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> - - - - - 1 changed file: - testsuite/driver/testlib.py Changes: ===================================== testsuite/driver/testlib.py ===================================== @@ -1590,6 +1590,13 @@ async def runTestAtomically(opts, name: TestName, func, args): output_buffer_ctx_var.reset(token) s = buf.getvalue() if s: + # Set the block apart from adjacent tests' output with a header + # naming the test and a trailing blank line. Without this, + # neighbouring blocks read as one interleaved mess, and output + # of passing tests cannot be attributed to its test at all. + if not s.endswith('\n'): + s += '\n' + s = '=====> output from {}:\n{}\n'.format(name, s) # The event loop is single-threaded and there is no await between # these calls, so the block is written out atomically. sys.stdout.write(s) View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/9dc76830395b1d84f032a54ed0b943eb... -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/9dc76830395b1d84f032a54ed0b943eb... You're receiving this email because of your account on gitlab.haskell.org.