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[[!tag open_issue_glibc open_issue_porting]]


# *bash* 4.0 vs. typing `C-c` (*SIGINT*)

Will show `-bash: echo: write error: (ipc/mig) wrong reply message ID` unter
certain conditions.

After having noticed that this error doesn't occur if starting *bash* with
`--norc`, I isolated it to the following command in `.bashrc`:
    
    case $TERM in
      xterm* | rxvt*)
        PROMPT_COMMAND='echo -ne "\033]0;${USER}@${HOSTNAME}:${PWD}\007"';;
    esac

... and indeed:

    tschwinge@flubber:~ $ echo "$TERM" -- "$PROMPT_COMMAND"
    xterm -- echo -ne "\033]0;${USER}@${HOSTNAME}:${PWD}\007"
    tschwinge@flubber:~ $ ^C
    -bash: echo: write error: (ipc/mig) wrong reply message ID
    tschwinge@flubber:~ $ PROMPT_COMMAND=
    tschwinge@flubber:~ $ ^C
    tschwinge@flubber:~ $ 

    bash-4.0$ PROMPT_COMMAND='echo >&2 -n foo\ '
    foo bash-4.0$ ^C

    bash-4.0$ PROMPT_COMMAND='echo >&1 -n foo\ '
    foo bash-4.0$ ^C
    bash: echo: write error: (ipc/mig) wrong reply message ID

    bash-4.0$ PROMPT_COMMAND='/bin/echo >&1 -n foo\ '
    foo bash-4.0$ ^C
    bash: start_pipeline: pgrp pipe: (ipc/mig) wrong reply message ID

So, there's something different with stdout in / after the SIGINT handler.