Configuration Information [Automatically generated, do not change]:
Machine: x86_64
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS: -DPROGRAM='bash' -DCONF_HOSTTYPE='x86_64'
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='x86_64-redhat-linux-gnu'
-DCONF_VENDOR='redhat' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash' -DSHELL
-DHAVE_CONFIG_H -I. -I. -I./include -I./lib -D_GNU_SOURCE -DRECYCLES_PIDS
-DDEFAULT_PATH_VALUE='/usr/local/bin:/usr/bin' -O2 -g -pipe -Wall
-Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong
--param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic
uname output: Linux tibs6 3.12.5-302.fc20.x86_64 #1 SMP Tue Dec 17 20:42:32 UTC
2013 x86_64 x86_64 x86_64 GNU/Linux
Machine Type: x86_64-redhat-linux-gnu
Bash Version: 4.2
Patch Level: 45
Release Status: release
Description:
The following forms of parameter substitution all seem to leak memory:
${variable/pattern}
${variable/pattern/string}
${variable//pattern}
${variable//pattern/string}
${variable#pattern}
${variable##pattern}
${variable%pattern}
${variable%%pattern}
Other forms (like ${variable:0:1} and ${#variable}, for example) do not
leak memory.
Repeat-By:
These can all be demonstrated by running a script consisting of an
infinite loop which repeatedly executes any command utilizing any of the above
examples. Like this:
#!/bin/bash
while :; do
echo ${variable/pattern}
done
The resident memory size will continually grow. This occurs on both
CentOS 6.5 (bash 4.1.2) and Fedora 20 (bash 4.2.45).
