From 9485f1c888422bc39f6f6b0e06e5dc230636be06 Mon Sep 17 00:00:00 2001
From: Andreas Rumpf <rumpf_a@web.de>
Date: Mon, 16 Oct 2017 20:29:16 +0200
Subject: make tests green again

---
 changelog.md                    | 6 ++++--
 compiler/ccgexprs.nim           | 9 ++++++---
 tests/ccgbugs/tret_arg_init.nim | 6 +++---
 tests/concepts/tmapconcept.nim  | 2 +-
 4 files changed, 14 insertions(+), 9 deletions(-)

diff --git a/changelog.md b/changelog.md
index a4161f504..ef9850915 100644
--- a/changelog.md
+++ b/changelog.md
@@ -8,5 +8,7 @@
 - Arrays of char cannot be converted to ``cstring`` anymore, pointers to
   arrays of char can! This means ``$`` for arrays can finally exist
   in ``system.nim`` and do the right thing.
-- JSON: Deprecated `getBVal`, `getFNum`, and `getNum` in favour to 
-  `getBool`, `getFloat`, `getBiggestInt`. Also `getInt` procedure was added.
\ No newline at end of file
+- JSON: Deprecated `getBVal`, `getFNum`, and `getNum` in favour to
+  `getBool`, `getFloat`, `getBiggestInt`. Also `getInt` procedure was added.
+- ``echo`` now works with strings that contain ``\0`` (the binary zero is not
+  shown) and ``nil`` strings are equal to empty strings.
diff --git a/compiler/ccgexprs.nim b/compiler/ccgexprs.nim
index 008599727..12e457e90 100644
--- a/compiler/ccgexprs.nim
+++ b/compiler/ccgexprs.nim
@@ -978,9 +978,12 @@ proc genEcho(p: BProc, n: PNode) =
     p.module.includeHeader("<base/log.h>")
     linefmt(p, cpsStmts, """Genode::log(""$1);$n""", args)
   else:
-    var a: TLoc
-    initLocExpr(p, n, a)
-    linefmt(p, cpsStmts, "#echoBinSafe($1, $2);$n", a.rdLoc, n.len.rope)
+    if n.len == 0:
+      linefmt(p, cpsStmts, "#echoBinSafe(NIM_NIL, $1);$n", n.len.rope)
+    else:
+      var a: TLoc
+      initLocExpr(p, n, a)
+      linefmt(p, cpsStmts, "#echoBinSafe($1, $2);$n", a.rdLoc, n.len.rope)
     when false:
       p.module.includeHeader("<stdio.h>")
       linefmt(p, cpsStmts, "printf($1$2);$n",
diff --git a/tests/ccgbugs/tret_arg_init.nim b/tests/ccgbugs/tret_arg_init.nim
index 3c80fb061..5cd67de3e 100644
--- a/tests/ccgbugs/tret_arg_init.nim
+++ b/tests/ccgbugs/tret_arg_init.nim
@@ -1,7 +1,7 @@
 discard """
-  output: '''nil
-nil
-nil'''
+  output: '''
+
+'''
 """
 
 type Bar = object
diff --git a/tests/concepts/tmapconcept.nim b/tests/concepts/tmapconcept.nim
index 81caed7c6..5082fcb61 100644
--- a/tests/concepts/tmapconcept.nim
+++ b/tests/concepts/tmapconcept.nim
@@ -1,7 +1,7 @@
 discard """
 output: '''10
 10
-nil
+
 1'''
 msg: '''
 K=string V=int
-- 
cgit 1.4.1-2-gfad0