-e not ignored in substition under tests

[Benedikt Becker <benedikt.becker@xxxxxxxx>]

Hi,

Dash does not ignore the -e option in substitutions $(...) under AND/OR lists and conditions. For example, in the program

    set -e
    echo "$(echo X; false; echo Y)" || true

the command `false` seems to interrupt the sequence and only X is printed (tested with dash 0.5.8.2 and git master). But according to my understanding of the POSIX specifications, `set -e` should be ignored under the OR list and X and Y should be printed . The same behaviour can be
observed when using the substitution in the condition of a while, until, and if. In contrast, set -e is effectively ignored in normal subshells under AND/OR lists and conditions (e.g., `set -e; (echo X; false; echo Y) || true` prints X and Y).

Is this a bug in dash or in my understanding?

Best wishes,
Benedikt

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