From 1c73db08b8d4f847f2868d8f5a3284cfb4e47428 Mon Sep 17 00:00:00 2001
From: Andreas Rumpf <rumpf_a@web.de>
Date: Wed, 7 Nov 2018 20:04:26 +0100
Subject: [PATCH] nim check fix; fixes #9609 [backport]

---
 compiler/vmgen.nim | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/compiler/vmgen.nim b/compiler/vmgen.nim
index 79c75f607b..00ec22a994 100644
--- a/compiler/vmgen.nim
+++ b/compiler/vmgen.nim
@@ -1115,13 +1115,14 @@ proc genMagic(c: PCtx; n: PNode; dest: var TDest; m: TMagic) =
   of mEcho:
     unused(c, n, dest)
     let n = n[1].skipConv
-    let x = c.getTempRange(n.len, slotTempUnknown)
-    internalAssert c.config, n.kind == nkBracket
-    for i in 0..<n.len:
-      var r: TRegister = x+i
-      c.gen(n.sons[i], r)
-    c.gABC(n, opcEcho, x, n.len)
-    c.freeTempRange(x, n.len)
+    if n.kind == nkBracket:
+      # can happen for nim check, see bug #9609
+      let x = c.getTempRange(n.len, slotTempUnknown)
+      for i in 0..<n.len:
+        var r: TRegister = x+i
+        c.gen(n.sons[i], r)
+      c.gABC(n, opcEcho, x, n.len)
+      c.freeTempRange(x, n.len)
   of mAppendStrCh:
     unused(c, n, dest)
     genBinaryStmtVar(c, n, opcAddStrCh)