Simon Jakobi pushed to branch wip/sjakobi/T18177 at Glasgow Haskell Compiler / GHC Commits: d1c54ffc by Simon Jakobi at 2026-03-11T21:08:16+01:00 Add regression test for #18177 Closes #18177. Assisted-by: Codex - - - - - 3 changed files: - testsuite/tests/driver/Makefile - + testsuite/tests/driver/T18177.hs - testsuite/tests/driver/all.T Changes: ===================================== testsuite/tests/driver/Makefile ===================================== @@ -767,6 +767,14 @@ T16476b: "$(TEST_HC)" $(TEST_HC_OPTS) -v0 @resp ./T16476b +# Test that GHC can handle an empty preprocessor response file. +# This used to cause GHC to hang indefinitely: #18177 +.PHONY: T18177 +T18177: + touch cpp-args + "$(TEST_HC)" $(TEST_HC_OPTS) -v0 -fforce-recomp -c T18177.hs -fhpc \ + -optP@cpp-args -optP-DX + .PHONY: T20569 T20569: "$(TEST_HC)" $(TEST_HC_OPTS) -c T20569/A.hs -i -iT20569 -hidir=interface ===================================== testsuite/tests/driver/T18177.hs ===================================== @@ -0,0 +1 @@ +module T18177 where ===================================== testsuite/tests/driver/all.T ===================================== @@ -314,6 +314,7 @@ test('MultiRootsErr', normal, multimod_compile_fail, ['MultiRootsErr', 'MultiRoo test('patch-level2', normal, compile, ['-Wcpp-undef']) test('T16476a', normal, makefile_test, []) test('T16476b', normal, makefile_test, []) +test('T18177', req_c, makefile_test, []) test('T20569', extra_files(["T20569/"]), makefile_test, []) test('T21866', normal, multimod_compile, ['T21866','-no-link']) test('T21349', extra_files(['T21349']), makefile_test, []) View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/d1c54ffc857b02dd38b23d0c1de3e1bc... -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/d1c54ffc857b02dd38b23d0c1de3e1bc... You're receiving this email because of your account on gitlab.haskell.org.