Bug-Description: If a SIGWINCH arrives while bash is performing redisplay, multi-line prompts are displayed incorrectly due to the display code being called recursively. http://ftp.gnu.org/gnu/bash/bash-4.0-patches/bash40-020 PACKAGE NAME: bash PACKAGE VERSION: 3.2.48 LICENSE: GPLv2+ Description of the issue: On some cold boots the X server would die almost immediately after boot. Also, a core dump was produced by the bash process running inside the rxvt terminal inside of X. The core dump trace back pointed to a known issue in bash that has since been fixed in bash 4.0. The issue involves the bash process receiving a SIGWINCH signal from its parent at just the right time, causing a recursive call into a function (rl_redisplay). This call can sometimes lead to segmentation faults because the function access static module data in a way which is not safe for reentrancy. The patch adds a simple semaphore around the call to prevent this reentrancy.
