Seg Fault in dpl_dict_iterate()

[vrancurel]

To reproduce, create a bucket and an object in S3

// Load the AWS SDK for Node.js
var AWS = require('aws-sdk');

/**
   Create a file for identification information in ~/.aws/credentials under 
   Mac/Linux or C:\Users\USERNAME\.aws\credentials under Windows

   [default]
   aws_access_key_id = your_access_key
   aws_secret_access_key = your_secret_key
 */

// Set your region for future requests.
//AWS.config.region = 'us-west-2';

// Create a bucket using bound parameters and put something in it.
// Make sure to change the bucket name from "my-bucket" to something unique.
var s3bucket = new AWS.S3({params: {Bucket: 'my-bucket'}});
s3bucket.createBucket(function() {
  var params = {Key: 'myKey', Body: 'Hello!'};
  s3bucket.upload(params, function(err, data) {
    if (err) {
      console.log("Error uploading data: ", err);
    } else {
      console.log("Successfully uploaded data to my-bucket/myKey");
    }
  });
});

Compile Droplet-sh, then with following droplet config file:

host = s3.amazonaws.com
access_key = your access key
secret_key = your secret key
aws_auth_sign_version = 4
aws_region = us-east-1

Then

$ gdb --args src/dplsh 
GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1
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License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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and "show warranty" for details.
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For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from src/dplsh...done.
(gdb) r
Starting program: /home/vr/WorkTemp/Droplet-sh/src/dplsh 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
info: src/droplet.c:135: dpl_init: PRNG has been seeded with enough data
:/> set trace_buffers 0
:/> my-bucket:
my-bucket:/> ls
myKey
my-bucket:/> getattr myKey 

Program received signal SIGSEGV, Segmentation fault.
dpl_dict_iterate (dict=0x0, cb_func=cb_func@entry=0x7ffff796c900 <cb_var_print>, 
    cb_arg=cb_arg@entry=0x7fffffffa9a0) at src/dict.c:233
233   for (bucket = 0;bucket < dict->n_buckets;bucket++)
(gdb) where
#0  dpl_dict_iterate (dict=0x0, cb_func=cb_func@entry=0x7ffff796c900 <cb_var_print>, 
    cb_arg=cb_arg@entry=0x7fffffffa9a0) at src/dict.c:233
#1  0x00007ffff796cc3b in dpl_dict_print (dict=<optimized out>, f=<optimized out>, 
    level=level@entry=0) at src/dict.c:352
#2  0x000000000040386c in cmd_getattr (argc=<optimized out>, argv=<optimized out>)
    at cmd_getattr.c:103
#3  0x0000000000407200 in shell_parse (defs=defs@entry=0x60bf40 <cmd_defs>, 
    str=0x63609e "", str@entry=0x636090 "getattr myKey ", 
    errp=errp@entry=0x7fffffffcc9c) at shell.c:270
#4  0x000000000040736d in shell_do (defs=0x60bf40 <cmd_defs>) at shell.c:363
#5  0x0000000000402c67 in main (argc=<optimized out>, argv=<optimized out>)
    at dplsh.c:206
(gdb)