Re: errexit and (Z)ERR trap regression

[Bart Schaefer <schaefer@brasslantern.com>]

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On Fri, Jun 21, 2024 at 10:50 PM Lawrence Velázquez <larryv@zsh.org> wrote:
>
> >    set -e; true && { false; echo one; } || echo two
> >
> > Is "false" there considered to be "any command of an AND-OR list" ?
>
> This ought to work the same as the subshell version: early exit is
> suppressed for the commands "true" and "{ false; echo one; }", so
> the overall output is still "one".

The following seems to fix all six of the mentioned cases from this
thread, then.

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diff --git a/Src/exec.c b/Src/exec.c
index e955e85df..3f0afa3d5 100644
--- a/Src/exec.c
+++ b/Src/exec.c
@@ -1486,6 +1486,8 @@ execlist(Estate state, int dont_change_job, int exiting)
 	    /* suppress errexit for commands before && and || and after ! */
 	    if (isandor || isnot)
 		noerrexit |= NOERREXIT_EXIT | NOERREXIT_RETURN;
+	    else if (!oldnoerrexit)
+		noerrexit = 0;
 	    switch (WC_SUBLIST_TYPE(code)) {
 	    case WC_SUBLIST_END:
 		/* End of sublist; just execute, ignoring status. */
diff --git a/Test/C03traps.ztst b/Test/C03traps.ztst
index de57765a0..47a15bf7f 100644
--- a/Test/C03traps.ztst
+++ b/Test/C03traps.ztst
@@ -995,6 +995,18 @@ F:Must be tested with a top-level script rather than source or function
 ?loop 0
 ?loop 1
 
+  ( true && (set -e; false; echo NOT REACHED) )
+  ( true && (trap "print Trapped!" ERR; false) )
+  ( true && { set -e; false; echo NOT REACHED } )
+  ( true && { trap "print Trapped!" ERR; false } )
+  ( set -e; true && (false; echo one) || echo two )
+  ( set -e; true && { false; echo one; } || echo two )
+0:ERR_EXIT is triggered by last command in an AND-OR list
+>Trapped!
+>Trapped!
+>one
+>one
+
   if zmodload zsh/system 2>/dev/null; then
   (
     trap 'echo TERM; exit 2' TERM