When I start gradle 2.13 with --no-daemon, gradle seems to be ignoring the option and starting the daemon anyway:
16:12:07.941 [DEBUG] [org.gradle.internal.nativeintegration.services.NativeServices] Native-platform posix files is not available. Continuing with fallback.
16:12:07.958 [DEBUG] [org.gradle.internal.nativeintegration.filesystem.services.FileSystemServices] Using JDK 7 file service org.gradle.internal.nativeintegration.filesystem.jdk7.WindowsJdk7Symlink
16:12:08.466 [LIFECYCLE] [org.gradle.launcher.daemon.client.SingleUseDaemonClient] To honour the JVM settings for this build a new JVM will be forked. Please consider using the daemon: https://docs.gradle.org/2.13/userguide/gradle_daemon.html.
16:12:08.501 [DEBUG] [org.gradle.launcher.daemon.client.DefaultDaemonStarter] Using daemon args: [c:\foo\jvm\jvm\bin\java.exe, -XX:MaxPermSize=256m, -XX:+HeapDumpOnOutOfMemoryError, -Xmx1024m, -Dfile.encoding=windows-1252, -Djava.io.tmpdir=c:\bar\output-amd64-win-release\BUILD_WORK, -Duser.country=GB, -Duser.language=en, -Duser.variant, -cp, C:\gradle\2.13\lib\gradle-launcher-2.13.jar]
16:12:08.506 [INFO] [org.gradle.launcher.daemon.client.DefaultDaemonStarter] Starting daemon process: workingDir = c:\bar\output-amd64-win-release\BUILD_WORK\gradle-cache\daemon\2.13, daemonArgs: [c:\foo\jvm\jvm\bin\java.exe, -XX:MaxPermSize=256m, -XX:+HeapDumpOnOutOfMemoryError, -Xmx1024m, -Dfile.encoding=windows-1252, -Djava.io.tmpdir=c:\bar\output-amd64-win-release\BUILD_WORK, -Duser.country=GB, -Duser.language=en, -Duser.variant, -cp, C:\gradle\2.13\lib\gradle-launcher-2.13.jar, org.gradle.launcher.daemon.bootstrap.GradleDaemon, 2.13]
16:12:08.527 [INFO] [org.gradle.process.internal.DefaultExecHandle] Starting process ‘Gradle build daemon’. Working directory: c:\bar\output-amd64-win-release\BUILD_WORK\gradle-cache\daemon\2.13 Command: c:\foo\jvm\jvm\bin\java.exe -XX:MaxPermSize=256m -XX:+HeapDumpOnOutOfMemoryError -Xmx1024m -Dfile.encoding=windows-1252 -Djava.io.tmpdir=c:\bar\output-amd64-win-release\BUILD_WORK -Duser.country=GB -Duser.language=en -Duser.variant -cp C:\gradle\2.13\lib\gradle-launcher-2.13.jar org.gradle.launcher.daemon.bootstrap.GradleDaemon 2.13
16:12:08.527 [DEBUG] [org.gradle.process.internal.DefaultExecHandle] Environment for process ‘Gradle build daemon’: …
16:12:08.529 [DEBUG] [org.gradle.process.internal.DefaultExecHandle] Changing state to: STARTING
16:12:08.532 [DEBUG] [org.gradle.process.internal.DefaultExecHandle] Waiting until process started: Gradle build daemon.
16:12:08.550 [DEBUG] [org.gradle.process.internal.DefaultExecHandle] Changing state to: STARTED
This definitely does not happen on 2.12, so appears to be a regression in the documented behaviour (as per https://docs.gradle.org/2.13/userguide/gradle_daemon.html)