From 7daf410f465b2d4e928edd55b0fc763b5243adb0 Mon Sep 17 00:00:00 2001
From: def <dennis@felsin9.de>
Date: Thu, 12 Mar 2015 23:48:38 +0100
Subject: [PATCH] Improve error message for failed conversion in VM

- Fixes #2045

- Old one:
  Error: conversion from unknown type to unknown type is invalid
- New one:
  Error: conversion from -1 to [0..255] is invalid
---
 compiler/vm.nim | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/compiler/vm.nim b/compiler/vm.nim
index f0a0135e82..3b5c8e7f3b 100644
--- a/compiler/vm.nim
+++ b/compiler/vm.nim
@@ -814,7 +814,7 @@ proc rawExecute(c: PCtx, start: int, tos: PStackFrame): TFullReg =
               leValueConv(regs[ra].regToNode, regs[rc].regToNode)):
         stackTrace(c, tos, pc, errGenerated,
           msgKindToString(errIllegalConvFromXtoY) % [
-          "unknown type" , "unknown type"])
+          $regs[ra].regToNode, "[" & $regs[rb].regToNode & ".." & $regs[rc].regToNode & "]"])
     of opcIndCall, opcIndCallAsgn:
       # dest = call regStart, n; where regStart = fn, arg1, ...
       let rb = instr.regB