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bug#38912: 27.0.60; PDumper meets segmentation fault when evil is loaded
From: |
Pip Cet |
Subject: |
bug#38912: 27.0.60; PDumper meets segmentation fault when evil is loaded |
Date: |
Tue, 7 Jan 2020 19:31:10 +0000 |
On Mon, Jan 6, 2020 at 6:13 PM Stefan Monnier <monnier@iro.umontreal.ca> wrote:
> The problem is simply that `sxhash` doesn't use the same "rules" about
> which objects are compared by identity and which objects are compared
> by contents.
I agree.
> so the problem doesn't affect only byte-compiled objects but also
> overlays, markers, windowconfigs, chartables, and fonts, AFAICT.
True, but then, those don't make much sense as hash keys in an
equal-based hash table. I don't think bytecode objects make sense as
hash keys in an equal-based hash table, either: two bytecode objects
can be `equal` yet be non-equivalent, even though it's somewhat
unlikely to occur in practice.
> The fix should be to make `sxhash` follow the same rules as `internal_equal`.
I think the two should largely follow the same rules, because all of
those objects should be equal iff they're eq. Hashing a marker based
on its position, for example, makes little sense: when the marker
moves, the hash value would change. Bytecode objects could be compared
based on their string representation, I guess, and maybe should be
hash-consed based on that (deduplicating identical bytecode objects
used as constants in other bytecode objects appears to save quite a
bit of space), once they're made immutable.
- bug#38912: 27.0.60; PDumper meets segmentation fault when evil is loaded, (continued)
- bug#38912: 27.0.60; PDumper meets segmentation fault when evil is loaded, Daniel Colascione, 2020/01/06
- bug#38912: 27.0.60; PDumper meets segmentation fault when evil is loaded, Pip Cet, 2020/01/06
- bug#38912: 27.0.60; PDumper meets segmentation fault when evil is loaded, Eli Zaretskii, 2020/01/06
- bug#38912: 27.0.60; PDumper meets segmentation fault when evil is loaded, Stefan Monnier, 2020/01/06
- bug#38912: 27.0.60; PDumper meets segmentation fault when evil is loaded, Noam Postavsky, 2020/01/06
- bug#38912: 27.0.60; PDumper meets segmentation fault when evil is loaded, Eli Zaretskii, 2020/01/06
- bug#38912: 27.0.60; PDumper meets segmentation fault when evil is loaded,
Pip Cet <=
- bug#38912: 27.0.60; PDumper meets segmentation fault when evil is loaded, Stefan Monnier, 2020/01/07
- bug#38912: 27.0.60; PDumper meets segmentation fault when evil is loaded, Paul Eggert, 2020/01/06
- bug#38912: 27.0.60; PDumper meets segmentation fault when evil is loaded, dancol, 2020/01/06
- bug#38912: 27.0.60; PDumper meets segmentation fault when evil is loaded, Stefan Monnier, 2020/01/07
- bug#38912: 27.0.60; PDumper meets segmentation fault when evil is loaded, Paul Eggert, 2020/01/07
- bug#38912: 27.0.60; PDumper meets segmentation fault when evil is loaded, Eli Zaretskii, 2020/01/07
- bug#38912: 27.0.60; PDumper meets segmentation fault when evil is loaded, Stefan Monnier, 2020/01/07
- bug#38912: 27.0.60; PDumper meets segmentation fault when evil is loaded, Eli Zaretskii, 2020/01/07
- bug#38912: 27.0.60; PDumper meets segmentation fault when evil is loaded, Stefan Monnier, 2020/01/07
- bug#38912: 27.0.60; PDumper meets segmentation fault when evil is loaded, Eli Zaretskii, 2020/01/07