Re: «run_pending_traps: bad value in trap_list» when `jobs` is run a trap

[Chet Ramey]

On 7/3/24 2:14 PM, Gioele Barabucci wrote:
> On 03/07/24 15:33, Chet Ramey wrote:
> > On 7/1/24 4:45 PM, Gioele Barabucci wrote:
> > > the following script (reduced from <https://bugs.debian.org/417946>)
> > >
> > >      #!/bin/bash
> > >      childfinished () { echo "jobs: $(jobs)"; }
> > >      trap childfinished SIGCHLD
> > >      sleep 1 &
> > >      wait
> > >
> > > causes bash 5.2.21 to output
> > >
> > >      ./par.sh: line 2: warning: run_pending_traps:
> > >      bad value in trap_list[17]: 0x5625e6fa43d0
> > >
> > > Does this warning hint at something like a dangling reference that 
> > > should be fixed, or can it be safely ignored?
> >
> > It's warning you that you're recursively calling the SIGCHLD trap handler.
> > It's clearer when the debugging messages are enabled:
>
> Could the message be reworded to mention that explicitly?
>
> line 2: warning: SIGCHLD trap handled called recursively

I had that enabled for a while; people got annoyed since you're allowed to
recursively call trap handlers -- the wisdom of doing so aside.

--
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/

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