From 4ee42ca0708b4db24d639e63d97a2f9c43964d0c Mon Sep 17 00:00:00 2001
From: "nijtmans@users.sourceforge.net" <jan.nijtmans>
Date: Mon, 3 Nov 2014 10:14:48 +0000
Subject: Better errormessage when file path contains invalid characters. See:
 [03414f517b7a74].

---
 win/tclWinChan.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/win/tclWinChan.c b/win/tclWinChan.c
index 6d480a8..a271919 100644
--- a/win/tclWinChan.c
+++ b/win/tclWinChan.c
@@ -840,6 +840,11 @@ TclpOpenFileChannel(
 
     nativeName = (TCHAR*) Tcl_FSGetNativePath(pathPtr);
     if (nativeName == NULL) {
+	if (interp != (Tcl_Interp *) NULL) {
+	    Tcl_AppendResult(interp, "couldn't open \"",
+	    TclGetString(pathPtr), "\": filename is invalid on this platform",
+	    NULL);
+	}
 	return NULL;
     }
 
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