install failed: undeclared identifier: 'defer'

[select]

I was following the official install instructions

git clone -b master git://github.com/Araq/Nim.git
cd Nim
git clone -b master --depth 1 git://github.com/nim-lang/csources
cd csources && sh build.sh
cd ..
bin/nim c koch

but the last line crashed

$ bin/nim c koch
config/nim.cfg(53, 2) Hint: added path: '/home/select/.babel/pkgs/' [Path]
config/nim.cfg(54, 2) Hint: added path: '/home/select/.nimble/pkgs/' [Path]
Hint: used config file '/home/select/bin/Nim/config/nim.cfg' [Conf]
Hint: used config file 'koch.nim.cfg' [Conf]
Hint: system [Processing]
lib/system.nim(3131, 12) Warning: undeclared conditional symbol; use --symbol to declare it: nimnode [User]
lib/system.nim(3222, 31) Warning: unknown magic 'ProcCall' might crash the compiler [UnknownMagic]
Hint: koch [Processing]
Hint: os [Processing]
Hint: strutils [Processing]
Hint: parseutils [Processing]
Hint: times [Processing]
Hint: posix [Processing]
Hint: parseopt [Processing]
lib/pure/parseopt.nim(56, 34) Warning: quoteIfContainsWhite is deprecated [Deprecated]
koch.nim(19, 16) Warning: parseopt is deprecated [Deprecated]
Hint: osproc [Processing]
Hint: strtabs [Processing]
Hint: hashes [Processing]
Hint: streams [Processing]
Hint: cpuinfo [Processing]
Hint: linux [Processing]
lib/pure/osproc.nim(647, 4) Error: undeclared identifier: 'defer'

did i miss something?

$ cat /etc/issue
Ubuntu 14.10 \n \l
$ uname -a
Linux select 3.16.0-30-generic #40-Ubuntu SMP Mon Jan 12 22:06:37 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

[def-]

Are you sure you're not on the devel branch of the Nim compiler? The csources and Nim compiler branch must always match. Either both master or both devel.

When I check lib/pure/osproc.nim at line 647 in the master branch, it says finally, not defer.

[select]

could be true, I'll check

[select]

Indeed I was in the wrong branch, thanks for the help :D

[rjammala]

I made sure that I was on the master branch and still hit this error.

[rjammalamadaka@localhost Nim]$ bin/nim c koch
config/nim.cfg(53, 2) Hint: added path: '/home/rjammalamadaka/.babel/pkgs/' [Path]
config/nim.cfg(54, 2) Hint: added path: '/home/rjammalamadaka/.nimble/pkgs/' [Path]
Hint: used config file '/home/rjammalamadaka/Nim/config/nim.cfg' [Conf]
Hint: used config file 'koch.nim.cfg' [Conf]
Hint: system [Processing]
lib/system.nim(147, 40) Warning: unknown magic 'Addr' might crash the compiler [UnknownMagic]
lib/system.nim(152, 39) Warning: unknown magic 'TypeOf' might crash the compiler [UnknownMagic]
lib/system.nim(229, 62) Warning: unknown magic 'DotDot' might crash the compiler [UnknownMagic]
lib/system.nim(237, 59) Warning: unknown magic 'DotDot' might crash the compiler [UnknownMagic]
lib/system.nim(3210, 31) Warning: unknown magic 'Plugin' might crash the compiler [UnknownMagic]
lib/system.nim(3242, 31) Warning: unknown magic 'ProcCall' might crash the compiler [UnknownMagic]
lib/system.nim(3251, 44) Warning: unknown magic 'Roof' might crash the compiler [UnknownMagic]
lib/system.nim(3269, 34) Warning: unknown magic 'XLenStr' might crash the compiler [UnknownMagic]
lib/system.nim(3270, 37) Warning: unknown magic 'XLenSeq' might crash the compiler [UnknownMagic]
Hint: koch [Processing]
Hint: os [Processing]
Hint: strutils [Processing]
Hint: parseutils [Processing]
Hint: times [Processing]
lib/pure/times.nim(585, 30) Info: instantiation from here
lib/system.nim(229, 62) Warning: unknown magic 'DotDot' might crash the compiler [UnknownMagic]
Hint: posix [Processing]
Hint: parseopt [Processing]
lib/pure/parseopt.nim(59, 34) Warning: quoteIfContainsWhite is deprecated [Deprecated]
Hint: osproc [Processing]
Hint: strtabs [Processing]
Hint: hashes [Processing]
Hint: streams [Processing]
Hint: cpuinfo [Processing]
Hint: linux [Processing]
lib/pure/osproc.nim(647, 4) Error: undeclared identifier: 'defer'

[rjammalamadaka@localhost Nim]$ uname -a
Linux localhost.localdomain 2.6.32-504.12.2.el6.x86_64 #1 SMP Wed Mar 11 22:03:14 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
[rjammalamadaka@localhost Nim]$ gcc --version
gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-11)
Copyright (C) 2010 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

[refi64]

To quote my message from #2624:

Your nim version is probably too old. Try rebuilding it from the C sources.