diff -r 49cce5802570 -r c1ab4d936e8e mercurial/HGCommand.st
--- a/mercurial/HGCommand.st	Sat Mar 09 22:29:37 2013 +0000
+++ b/mercurial/HGCommand.st	Sat Mar 09 23:14:44 2013 +0000
@@ -581,14 +581,21 @@
     stdoutPipe second close.
     stderrPipe second close.
     pid isNil ifTrue:[
+        stdout close.
+        stderr close.
         HGCommandError raiseErrorString: 'cannot execute hg command'.
-        stdout close.
         ^ self.
     ].
-    (Debug and:[OperatingSystem isUNIXlike]) ifTrue:[
-        stdout := stdout contents asString readStream.
-        stderr := stderr contents asString readStream.
+    OperatingSystem isUNIXlike ifTrue:[
+        "/JV: Q: Why this is necessary?
+        stdout readWait.
+        stdout readWait.
+        Debug ifTrue:[
+            stdout := stdout contents asString readStream.
+            stderr := stderr contents asString readStream.
+        ]
     ].
+
     self spawnErrorReaderOn: stderr.
     self spawnOutputReaderOn: stdout.
 
@@ -610,7 +617,7 @@
     "Modified: / 17-12-2011 / 19:22:00 / dundee"
     "Modified (format): / 27-12-2011 / 15:53:54 / dundee"
     "Modified: / 14-11-2012 / 13:41:57 / jv"
-    "Modified: / 03-03-2013 / 19:50:42 / Jan Vrany <jan.vrany@fit.cvut.cz>"
+    "Modified (format): / 09-03-2013 / 23:12:34 / Jan Vrany <jan.vrany@fit.cvut.cz>"
 !
 
 executeOnRepository: anHGRepository