Why "zsh" crashes on "unicode" characters ?

Solution Verified - Updated -

Issue

  • zsh occasionally crashes, seems to be unicode related.
  • Here's a reproducer that crashes zsh every time :
$ env -i zsh -f repro_zsh_crash
*** Error in `zsh': double free or corruption (!prev): 0x00000000008593f0 ***
======= Backtrace: =========
/lib64/libc.so.6(+0x7c503)[0x7f942768d503]
zsh(bin_print+0x2ad)[0x417efd]
zsh(execbuiltin+0x302)[0x41ca02]
zsh[0x42bc6a]
zsh[0x42c2c6]
zsh[0x42c703]
zsh(execlist+0x815)[0x42e495]
zsh(execfor+0x251)[0x4505a1]
zsh[0x42ad94]
zsh[0x42c2c6]
zsh[0x42c703]
zsh(execlist+0x815)[0x42e495]
zsh(execode+0xa2)[0x42e782]
zsh(loop+0xbf)[0x440a3f]
zsh(zsh_main+0x47e)[0x44417e]
/lib64/libc.so.6(__libc_start_main+0xf5)[0x7f9427632b35]
zsh[0x40ed8e]
======= Memory map: ========
...
zsh: abort (core dumped)  env -i zsh -f repro_zsh_crash

Environment

  • Red Hat Enterprise Linux 7.3
  • zsh-5.0.2-25.el7.x86_64

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