Temporarily emit backtraces from child processes to try and see where the SIGILLs are coming from

Author: grynspan

Sources/Testing/ExitTests/ExitTest.swift

@@ -871,12 +871,12 @@ extension ExitTest {
       }
 #endif
 
-      if childEnvironment["SWIFT_BACKTRACE"] == nil {
-        // Disable interactive backtraces unless explicitly enabled to reduce
-        // the noise level during the exit test.
-        childEnvironment["SWIFT_BACKTRACE"] = "enable=no"
-      }
-
+//      if childEnvironment["SWIFT_BACKTRACE"] == nil {
+//        // Disable interactive backtraces unless explicitly enabled to reduce
+//        // the noise level during the exit test.
+//        childEnvironment["SWIFT_BACKTRACE"] = "enable=no"
+//      }
+//
       // Insert a specific variable that tells the child process which exit test
       // to run.
       try JSON.withEncoding(of: exitTest.id) { json in
@@ -933,8 +933,8 @@ extension ExitTest {
               atPath: childProcessExecutablePath,
               arguments: childArguments,
               environment: childEnvironment,
-              standardOutput: stdoutWriteEnd,
-              standardError: stderrWriteEnd,
+//              standardOutput: stdoutWriteEnd,
+//              standardError: stderrWriteEnd,
               additionalFileHandles: [backChannelWriteEnd, capturedValuesReadEnd]
             )
           }

Sources/Testing/ExitTests/SpawnProcess.swift

@@ -153,9 +153,9 @@ func spawnExecutable(
       func inherit(_ fileHandle: borrowing FileHandle?, as standardFD: CInt? = nil) throws {
         if fileHandle != nil {
           try inherit(fileHandle!, as: standardFD)
-        } else if let standardFD {
-          let mode = (standardFD == STDIN_FILENO) ? O_RDONLY : O_WRONLY
-          _ = posix_spawn_file_actions_addopen(fileActions, standardFD, "/dev/null", mode, 0)
+//        } else if let standardFD {
+//          let mode = (standardFD == STDIN_FILENO) ? O_RDONLY : O_WRONLY
+//          _ = posix_spawn_file_actions_addopen(fileActions, standardFD, "/dev/null", mode, 0)
         }
       }