Fix stack traces suppressed in thin client batch mode (fixes #7322)

main/src/main/scala/sbt/Main.scala

@@ -1144,12 +1144,20 @@ object BuiltinCommands {
         .getOpt(Keys.minForcegcInterval)
         .getOrElse(GCUtil.defaultMinForcegcInterval)
       val exec: Exec = getExec(s1, minGCInterval)
+      val isInteractive = exec.source match {
+        case Some(src) if src.channelName.startsWith("network") =>
+          exchange.channelForName(src.channelName) match {
+            case Some(nc: NetworkChannel) => nc.isInteractive
+            case _                        => true
+          }
+        case _ => true
+      }
       val newState = s1
         .copy(
           onFailure = Some(Exec(Shell, None)),
           remainingCommands = exec +: Exec(Shell, None) +: s1.remainingCommands
         )
-        .setInteractive(true)
+        .setInteractive(isInteractive)
       val res =
         if (exec.commandLine.trim.isEmpty) newState
         else newState.clearGlobalLog

sbt-app/src/sbt-test/actions/streams-trace-level/build.sbt

@@ -0,0 +1,17 @@
+lazy val helloWithoutStreams = taskKey[Unit]("")
+lazy val helloWithStreams = taskKey[Unit]("")
+lazy val checkTraceLevel = taskKey[Unit]("")
+
+helloWithoutStreams := {
+  throw new RuntimeException("boom without streams!")
+}
+
+helloWithStreams := {
+  val log = streams.value.log
+  throw new RuntimeException("boom with streams!")
+}
+
+checkTraceLevel := {
+  val level = traceLevel.value
+  assert(level != -1, s"Expected traceLevel != -1 in batch mode, but got $level")
+}

sbt-app/src/sbt-test/actions/streams-trace-level/test

@@ -0,0 +1,3 @@
+-> helloWithoutStreams
+-> helloWithStreams
+> checkTraceLevel