Segmentation fault with associative arrays

[John Valko]

If we write code like:

function foo {
    declare -A hash
    declare hash[foo]=bar #bash crashes here
}

Bash crashes when calling this function. The same exact code works as expected if it's not in a shell function.

Additional details:

$ lsb_release -rd
Description: Ubuntu 11.10
Release: 11.10
$ apt-cache policy bash
bash:
  Installed: 4.2-0ubuntu4
  Candidate: 4.2-0ubuntu4
  Version table:
 *** 4.2-0ubuntu4 0
        500 http://us.archive.ubuntu.com/ubuntu/ oneiric/main amd64 Packages
        100 /var/lib/dpkg/status

[Daniel Manrique (roadmr)]

Confirmed with importance: Medium as it is "A bug that has a moderate impact on a core application. "

This script will reproduce (I changed the associative array's key to "baz" to avoid confusion with the function name (foo)).

TEST CASE:

Run the following BASH script:

#!/bin/bash
function foo {
    declare -A hash
    declare hash[baz]=bar #bash crashes here
}

foo

Expected result:
nothing, but not a crash either

Actual result:
Segmentation fault

[John Valko (jvalko-gmail)]

I'm not sure that "nothing" is the expected result -- the expected result is that it should add a new key/value to the associative array:

$ declare -A hash
$ declare hash[baz]=bar
$ declare -p hash
declare -A hash='([baz]="bar" )'

(output from running directly, rather than as a shell function).