I&#39;ve been banging my head against the wall for the better part of an hour trying to figure out what&#39;s going wrong here, and I&#39;m sure (or rather hoping) it&#39;s something fairly obvious that I&#39;m overlooking. I&#39;m using Ruby 1.9.1, Sinatra 1.0, and RMagick 2.13.1. ImageMagick and RMagick are correctly installed and functional—I&#39;ve successfully manipulated and saved images from irb.

The relevant part of the params array (formatting changes for the sake of readability):

    {&quot;admin_user_new_image_file&quot;=&gt;
        {
            :filename=&gt;&quot;freddie-on-shetland-pony.png&quot;,
            :type=&gt;&quot;image/png&quot;, 
            :name=&gt;&quot;admin_user_new_image_file&quot;, 
            :tempfile=&gt;#&lt;File:/var/folders/a7/a7pO5jMcGLCww9XBGRvWfE+++TI/-Tmp-/RackMultipart20100514-20700-o2tkqu-0&gt;,
            :head=&gt;&quot;Content-Disposition: form-data; name=\&quot;admin_user_new_image_file\&quot;; filename=\&quot;freddie-on-shetland-pony.png\&quot;\r\nContent-Type: image/png\r\n&quot;
        }
    }

The relevant code:

    post &quot;/admin/user/:account_name/image/new/&quot; do
      if params[:admin_user_new_image_file][:tempfile]
        thumbnail = Magick::Image.read(&quot;png:&quot;+params[:admin_user_new_image_file][:tempfile].path).first
      end
    end

The error (line 229 is the line starting with &quot;thumbnail = &quot;:

    config.ru:229: [BUG] Segmentation fault
    ruby 1.9.1p376 (2009-12-07 revision 26041) [i386-darwin10.3.0]
    
    -- control frame ----------
    c:0042 p:---- s:0196 b:0196 l:000195 d:000195 CFUNC  :read
    c:0041 p:0121 s:0192 b:0192 l:001ab8 d:000191 LAMBDA config.ru:229
    c:0040 p:---- s:0189 b:0189 l:000188 d:000188 FINISH
    c:0039 p:---- s:0187 b:0187 l:000186 d:000186 CFUNC  :call
    c:0038 p:0018 s:0184 b:0184 l:001d78 d:000183 BLOCK  /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:865
    c:0037 p:---- s:0182 b:0182 l:000181 d:000181 FINISH
    c:0036 p:---- s:0180 b:0180 l:000179 d:000179 CFUNC  :instance_eval
    c:0035 p:0016 s:0177 b:0175 l:000174 d:000174 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:521
    c:0034 p:0024 s:0171 b:0171 l:000148 d:000170 BLOCK  /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:500
    c:0033 p:---- s:0169 b:0169 l:000168 d:000168 FINISH
    c:0032 p:---- s:0167 b:0167 l:000166 d:000166 CFUNC  :catch
    c:0031 p:0140 s:0163 b:0163 l:000148 d:000162 BLOCK  /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:497
    c:0030 p:---- s:0154 b:0154 l:000153 d:000153 FINISH
    c:0029 p:---- s:0152 b:0152 l:000151 d:000151 CFUNC  :each
    c:0028 p:0073 s:0149 b:0149 l:000148 d:000148 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:476
    c:0027 p:0076 s:0141 b:0141 l:000140 d:000140 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:601
    c:0026 p:0009 s:0137 b:0137 l:000138 d:000136 BLOCK  /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:411
    c:0025 p:---- s:0135 b:0135 l:000134 d:000134 FINISH
    c:0024 p:---- s:0133 b:0133 l:000132 d:000132 CFUNC  :instance_eval
    c:0023 p:0012 s:0130 b:0130 l:000121 d:000129 BLOCK  /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:566
    c:0022 p:---- s:0128 b:0128 l:000127 d:000127 FINISH
    c:0021 p:---- s:0126 b:0126 l:000125 d:000125 CFUNC  :catch
    c:0020 p:0013 s:0122 b:0122 l:000121 d:000121 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:566
    c:0019 p:0098 s:0115 b:0115 l:000138 d:000138 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:411
    c:0018 p:0019 s:0108 b:0108 l:000107 d:000107 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:399
    c:0017 p:0014 s:0104 b:0104 l:000103 d:000103 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.0/lib/rack/showexceptions.rb:24
    c:0016 p:0150 s:0098 b:0098 l:000097 d:000097 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.0/lib/rack/methodoverride.rb:24
    c:0015 p:0031 s:0092 b:0092 l:000091 d:000091 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.0/lib/rack/commonlogger.rb:18
    c:0014 p:0018 s:0084 b:0084 l:002080 d:000083 BLOCK  /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:979
    c:0013 p:0032 s:0082 b:0082 l:000081 d:000081 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:1005
    c:0012 p:0011 s:0078 b:0078 l:002080 d:002080 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:979
    c:0011 p:0100 s:0074 b:0074 l:000ff0 d:000ff0 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.0/lib/rack/lint.rb:47
    c:0010 p:0022 s:0068 b:0068 l:000067 d:000067 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.0/lib/rack/lint.rb:35
    c:0009 p:0014 s:0064 b:0064 l:000063 d:000063 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.0/lib/rack/showexceptions.rb:24
    c:0008 p:0031 s:0058 b:0058 l:000057 d:000057 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.0/lib/rack/commonlogger.rb:18
    c:0007 p:0014 s:0050 b:0050 l:000049 d:000049 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.0/lib/rack/content_length.rb:13
    c:0006 p:0320 s:0042 b:0042 l:000041 d:000041 METHOD /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.0/lib/rack/handler/webrick.rb:48
    c:0005 p:0256 s:0030 b:0030 l:000029 d:000029 METHOD /usr/local/lib/ruby/1.9.1/webrick/httpserver.rb:111
    c:0004 p:0382 s:0020 b:0020 l:000019 d:000019 METHOD /usr/local/lib/ruby/1.9.1/webrick/httpserver.rb:70
    c:0003 p:0123 s:0009 b:0009 l:000bc8 d:000008 BLOCK  /usr/local/lib/ruby/1.9.1/webrick/server.rb:183
    c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH
    c:0001 p:---- s:0002 b:0002 l:000001 d:000001 TOP   
    ---------------------------
    -- Ruby level backtrace information-----------------------------------------
    config.ru:229:in `read&#39;
    config.ru:229:in `block (2 levels) in &lt;main&gt;&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:865:in `call&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:865:in `block in route&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:521:in `instance_eval&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:521:in `route_eval&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:500:in `block (2 levels) in route!&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:497:in `catch&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:497:in `block in route!&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:476:in `each&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:476:in `route!&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:601:in `dispatch!&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:411:in `block in call!&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:566:in `instance_eval&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:566:in `block in invoke&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:566:in `catch&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:566:in `invoke&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:411:in `call!&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:399:in `call&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.0/lib/rack/showexceptions.rb:24:in `call&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.0/lib/rack/methodoverride.rb:24:in `call&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.0/lib/rack/commonlogger.rb:18:in `call&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:979:in `block in call&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:1005:in `synchronize&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:979:in `call&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.0/lib/rack/lint.rb:47:in `_call&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.0/lib/rack/lint.rb:35:in `call&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.0/lib/rack/showexceptions.rb:24:in `call&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.0/lib/rack/commonlogger.rb:18:in `call&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.0/lib/rack/content_length.rb:13:in `call&#39;
    /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.1.0/lib/rack/handler/webrick.rb:48:in `service&#39;
    /usr/local/lib/ruby/1.9.1/webrick/httpserver.rb:111:in `service&#39;
    /usr/local/lib/ruby/1.9.1/webrick/httpserver.rb:70:in `run&#39;
    /usr/local/lib/ruby/1.9.1/webrick/server.rb:183:in `block in start_thread&#39;
    
    -- C level backtrace information -------------------------------------------
    0x10010cd8d 0   libruby.dylib                       0x000000010010cd8d rb_vm_bugreport + 77
    0x10002b184 1   libruby.dylib                       0x000000010002b184 report_bug + 260
    0x10002b318 2   libruby.dylib                       0x000000010002b318 rb_bug + 200
    0x1000b7124 3   libruby.dylib                       0x00000001000b7124 sigsegv + 132
    0x7fff8301c80a 4   libSystem.B.dylib                   0x00007fff8301c80a _sigtramp + 26
    0x1032313ac 5   libMagickCore.3.dylib               0x00000001032313ac Splay + 300
    0x103119245 6   libMagickCore.3.dylib               0x0000000103119245 AcquirePixelCache + 325
    0x1031cb317 7   libMagickCore.3.dylib               0x00000001031cb317 AcquireImage + 375
    0x10333035b 8   libMagickCore.3.dylib               0x000000010333035b ReadPNGImage + 155
    0x1031418fd 9   libMagickCore.3.dylib               0x00000001031418fd ReadImage + 2221
    0x101f1b72b 10  RMagick2.bundle                     0x0000000101f1b72b rd_image + 339
    0x101f1b59b 11  RMagick2.bundle                     0x0000000101f1b59b Image_read + 36
    0x1000fd0e4 12  libruby.dylib                       0x00000001000fd0e4 vm_call_cfunc + 340
    0x1000fe9b0 13  libruby.dylib                       0x00000001000fe9b0 vm_call_method + 896
    0x1000ff8fc 14  libruby.dylib                       0x00000001000ff8fc vm_exec_core + 3180
    0x100104b93 15  libruby.dylib                       0x0000000100104b93 vm_exec + 1203
    0x100106643 16  libruby.dylib                       0x0000000100106643 rb_vm_invoke_proc + 691
    0x100106ccd 17  libruby.dylib                       0x0000000100106ccd vm_call0 + 1085
    0x1000317c6 18  libruby.dylib                       0x00000001000317c6 rb_method_call + 406
    0x1000fd0e4 19  libruby.dylib                       0x00000001000fd0e4 vm_call_cfunc + 340
    0x1000fe9b0 20  libruby.dylib                       0x00000001000fe9b0 vm_call_method + 896
    0x1000ff8fc 21  libruby.dylib                       0x00000001000ff8fc vm_exec_core + 3180
    0x100104b93 22  libruby.dylib                       0x0000000100104b93 vm_exec + 1203
    0x100105ce6 23  libruby.dylib                       0x0000000100105ce6 yield_under + 710
    0x100106188 24  libruby.dylib                       0x0000000100106188 specific_eval + 72
    0x1000fd0e4 25  libruby.dylib                       0x00000001000fd0e4 vm_call_cfunc + 340
    0x1000fe9b0 26  libruby.dylib                       0x00000001000fe9b0 vm_call_method + 896
    0x1000ff8fc 27  libruby.dylib                       0x00000001000ff8fc vm_exec_core + 3180
    0x100104b93 28  libruby.dylib                       0x0000000100104b93 vm_exec + 1203
    0x10010b6bf 29  libruby.dylib                       0x000000010010b6bf rb_f_catch + 639
    0x1000fd0e4 30  libruby.dylib                       0x00000001000fd0e4 vm_call_cfunc + 340
    0x1000fe9b0 31  libruby.dylib                       0x00000001000fe9b0 vm_call_method + 896
    0x1000ff8fc 32  libruby.dylib                       0x00000001000ff8fc vm_exec_core + 3180
    0x100104b93 33  libruby.dylib                       0x0000000100104b93 vm_exec + 1203
    0x10010aac9 34  libruby.dylib                       0x000000010010aac9 rb_yield + 505
    0x100007902 35  libruby.dylib                       0x0000000100007902 rb_ary_each + 82
    0x1000fd0e4 36  libruby.dylib                       0x00000001000fd0e4 vm_call_cfunc + 340
    0x1000fe9b0 37  libruby.dylib                       0x00000001000fe9b0 vm_call_method + 896
    0x1000ff8fc 38  libruby.dylib                       0x00000001000ff8fc vm_exec_core + 3180
    0x100104b93 39  libruby.dylib                       0x0000000100104b93 vm_exec + 1203
    0x100105ce6 40  libruby.dylib                       0x0000000100105ce6 yield_under + 710
    0x100106188 41  libruby.dylib                       0x0000000100106188 specific_eval + 72
    0x1000fd0e4 42  libruby.dylib                       0x00000001000fd0e4 vm_call_cfunc + 340
    0x1000fe9b0 43  libruby.dylib                       0x00000001000fe9b0 vm_call_method + 896
    0x1000ff8fc 44  libruby.dylib                       0x00000001000ff8fc vm_exec_core + 3180
    0x100104b93 45  libruby.dylib                       0x0000000100104b93 vm_exec + 1203
    0x10010b6bf 46  libruby.dylib                       0x000000010010b6bf rb_f_catch + 639
    0x1000fd0e4 47  libruby.dylib                       0x00000001000fd0e4 vm_call_cfunc + 340
    0x1000fe9b0 48  libruby.dylib                       0x00000001000fe9b0 vm_call_method + 896
    0x1000ff8fc 49  libruby.dylib                       0x00000001000ff8fc vm_exec_core + 3180
    0x100104b93 50  libruby.dylib                       0x0000000100104b93 vm_exec + 1203
    0x100106643 51  libruby.dylib                       0x0000000100106643 rb_vm_invoke_proc + 691
    0x100111803 52  libruby.dylib                       0x0000000100111803 thread_start_func_2 + 835
    0x100111921 53  libruby.dylib                       0x0000000100111921 thread_start_func_1 + 17
    0x7fff82ff58b6 54  libSystem.B.dylib                   0x00007fff82ff58b6 _pthread_start + 331
    0x7fff82ff5769 55  libSystem.B.dylib                   0x00007fff82ff5769 thread_start + 13
    
    [NOTE]
    You may encounter a bug of Ruby interpreter. Bug reports are welcome.
    For details: http://www.ruby-lang.org/bugreport.html
    
    Abort trap

Anyone have any idea what&#39;s going on? Thanks!

All Ruby 1.9.1 Solutions on Gang of Coders

Total of 1 Ruby 1.9.1 Solutions

Why is this RMagick call generating a segmentation fault?