commit f2a80d70e485781c48321fe8ccf7b50d79f63cdc
Author: Rolf Bjarne Kvinge <[email protected]>
Date:   Thu Mar 31 14:09:53 2016 +0200

    [process] Initialize exit code before calling GetExitCodeProcess.

    GetExitCodeProcess may fail (if getting the exit code of an exited process
    we only have the pid for) and not write anything to the *code
    parameter.

    In that case GetExitCodeProcess would return random memory.

    If that random memory happened to be 0x103 (259), then Process.HasExited
    would return false, even though the process had actually exited.

    Due to the reference import of Process in master, this code is
    completely different there, and this bug probably only occurs on
    the mono-4.4.0-branch.

diff --git a/mono/metadata/process.c b/mono/metadata/process.c
index f662cf6..5794956 100644
--- a/mono/metadata/process.c
+++ b/mono/metadata/process.c
@@ -867,7 +867,7 @@ gint64 ves_icall_System_Diagnostics_Process_StartTime_internal (HANDLE process)

 gint32 ves_icall_System_Diagnostics_Process_ExitCode_internal (HANDLE process)
 {
-	DWORD code;
+	DWORD code = 0;

 	GetExitCodeProcess (process, &code);