gistfile1.txt

                      {clause,2179,
                       [{nil,2179},{var,2179,'Acc'}],
                       [],
                       [{call,2180,
                         {remote,2180,{atom,2180,lists},{atom,2180,reverse}},
                         [{var,2180,'Acc'}]}]},
                      {clause,2181,
                       [{cons,2181,{var,2181,'H'},{var,2181,'T'}},
                        {var,2181,'Acc'}],
                       [],
                       [{call,2182,
                         {atom,2182,escape_lt_and_gt1},
                         [{var,2182,'T'},
                          {cons,2182,{var,2182,'H'},{var,2182,'Acc'}}]}]}]},
                    {eof,2183}],
                   [{"./cover.erl",[{996,ms_transform,{50,'Module'}}]}]}]},
                {erl_lint,compiler_options,1},
                {erl_lint,module,3},
                {compile,lint_module,1},
                {compile,'-internal_comp/4-anonymous-1-',2},
                {compile,fold_comp,3},
                {compile,internal_comp,4},
                {compile,internal,3}]}
make[3]: *** [../ebin/cover.beam] Error 1
make[2]: *** [opt] Error 2
make[1]: *** [opt] Error 2
make: *** [libs] Error 2
Exit status: 2

http://github.com/mxcl/homebrew/blob/master/Library/Formula/erlang.rb#L57

==> Environment
HOMEBREW_VERSION: 0.7
HEAD: 635203c5e8ee6d505fd236e0f857285990511b44
HOMEBREW_PREFIX: /usr/local
HOMEBREW_CELLAR: /usr/local/Cellar
HOMEBREW_REPOSITORY: /usr/local
HOMEBREW_LIBRARY_PATH: /usr/local/Library/Homebrew
Hardware: dual-core 64-bit penryn
OS X: 10.6.4
Kernel Architecture: i386
Ruby: 1.8.7-174
/usr/bin/ruby => /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby
GCC-4.0: build 5494 
GCC-4.2: build 5664 
LLVM: build 2326 
MacPorts or Fink? /opt/local/bin/port
X11 installed? true

==> Build Flags
CC: /usr/bin/cc => /usr/bin/gcc-4.2
CXX: /usr/bin/c++ => /usr/bin/c++-4.2
LD: /usr/bin/cc => /usr/bin/gcc-4.2
CFLAGS: -O3 -march=core2 -msse4.1 -w -pipe
CXXFLAGS: -O3 -march=core2 -msse4.1 -w -pipe
Error: Failure while executing: make 
Please report this bug at http://github.com/mxcl/homebrew/issues
These existing issues may help you:
http://github.com/mxcl/homebrew/issues/#issue/1173

Also try:
  `brew doctor` to check your setup for common problems.
  `brew missing` to check installed packages for missing deps.

http://friendpaste.com/7bDkpdUPCcIdALBxvsCVSL

Things get interesting around line 1587