Try using CAPTURE_CMAKE_ERROR to work around CI test failures.

Author: ned14

.ci.cmake

@@ -26,6 +26,7 @@ endif()
 ctest_build(TARGET _dl)
 ctest_build(TARGET _sl)
 set(retval 0)
+set(retval_cmake 0)
 if(NOT CTEST_DISABLE_TESTING)
   # shared_fs_mutex takes too long on CI
   # tls_socket_handle is unstable
@@ -34,15 +35,15 @@ if(NOT CTEST_DISABLE_TESTING)
   if(WIN32)
     # Azure's Windows version doesn't permit unprivileged creation of symbolic links
     if(CTEST_CMAKE_GENERATOR MATCHES "Visual Studio 15 2017.*")
-      ctest_test(RETURN_VALUE retval EXCLUDE "${LLFIO_DISABLE_TESTS}|symlink|process_handle")
+      ctest_test(RETURN_VALUE retval CAPTURE_CMAKE_ERROR retval_cmake EXCLUDE "${LLFIO_DISABLE_TESTS}|symlink|process_handle")
     else()
-      ctest_test(RETURN_VALUE retval EXCLUDE "${LLFIO_DISABLE_TESTS}|symlink")
+      ctest_test(RETURN_VALUE retval CAPTURE_CMAKE_ERROR retval_cmake EXCLUDE "${LLFIO_DISABLE_TESTS}|symlink")
     endif()
   elseif(APPLE)
     # Around Feb 2021 the Mac OS CI began failing pipe_handle and I don't have a Mac to diagnose
-    ctest_test(RETURN_VALUE retval EXCLUDE "${LLFIO_DISABLE_TESTS}|pipe_handle")
+    ctest_test(RETURN_VALUE retval CAPTURE_CMAKE_ERROR retval_cmake EXCLUDE "${LLFIO_DISABLE_TESTS}|pipe_handle")
   else()
-    ctest_test(RETURN_VALUE retval EXCLUDE "${LLFIO_DISABLE_TESTS}")
+    ctest_test(RETURN_VALUE retval CAPTURE_CMAKE_ERROR retval_cmake EXCLUDE "${LLFIO_DISABLE_TESTS}")
   endif()
 endif()
 if(WIN32)
@@ -183,18 +184,20 @@ else()
 endif()
 set(retval2 0)
 set(retval3 0)
+set(retval2_cmake 0)
+set(retval3_cmake 0)
 if(NOT CTEST_DISABLE_TESTING)
   if(("$ENV{CXX}" MATCHES "clang") OR ("$ENV{CXX}" MATCHES "g\\+\\+"))
     if("$ENV{CXX}" MATCHES "clang")
       ctest_build(TARGET _sl-asan)
       set(CTEST_CONFIGURATION_TYPE "asan")
-      ctest_test(RETURN_VALUE retval2 INCLUDE "llfio_sl" EXCLUDE "shared_fs_mutex")
+      ctest_test(RETURN_VALUE retval2 CAPTURE_CMAKE_ERROR retval2_cmake INCLUDE "llfio_sl" EXCLUDE "shared_fs_mutex")
     else()
       set(retval2 0)
     endif()
     ctest_build(TARGET _sl-ubsan)
     set(CTEST_CONFIGURATION_TYPE "ubsan")
-    ctest_test(RETURN_VALUE retval3 INCLUDE "llfio_sl" EXCLUDE "shared_fs_mutex")
+    ctest_test(RETURN_VALUE retval3 CAPTURE_CMAKE_ERROR retval3_cmake INCLUDE "llfio_sl" EXCLUDE "shared_fs_mutex")
   endif()
   merge_junit_results_into_ctest_xml()
 endif()
@@ -203,7 +206,7 @@ if(EXISTS "${toupload}")
 endif()
 ctest_submit()
 if(NOT retval EQUAL 0 OR NOT retval2 EQUAL 0 OR NOT retval3 EQUAL 0)
-  message(FATAL_ERROR "FATAL: Running tests exited with ${retval} ${retval2} ${retval3}")
+  message(FATAL_ERROR "FATAL: Running tests exited with ${retval}-${retval_cmake} ${retval2}-${retval2_cmake} ${retval3}-${retval3_cmake}")
 else()
-  message(STATUS "SUCCESS: Running tests exited with ${retval} ${retval2} ${retval3}")
+  message(STATUS "SUCCESS: Running tests exited with ${retval}-${retval_cmake} ${retval2}-${retval2_cmake} ${retval3}-${retval3_cmake}")
 endif()