GNU logs - #69064, boring messages

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Subject: bug#69064: python-mysqlclient: MySQLdb.string_literal SIGSEGV
Resent-From: Marco Rimoldi <rimarko@HIDDEN>
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From: Marco Rimoldi <rimarko@HIDDEN>
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 Content preview:  Hello,
 I think I found a bug in python-mysqlclient@HIDDEN compiled
 with mariadb:dev@HIDDEN To reproduce: run a Python 3.10.7 terminal, import
 the MySQLdb module,
 call the string_literal function with any argument. Interpreter
 crashes due to segmentation fault. Arch is x86_64. 
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Hello,

I think I found a bug in python-mysqlclient@HIDDEN compiled with mariadb:dev@HIDDEN

To reproduce: run a Python 3.10.7 terminal, import the MySQLdb module, call the  string_literal function with any argument. Interpreter crashes due to segmentation fault. Arch is x86_64.

Same with version 2.2.4, tested tweaking the package definition.

I tried installing mariadb with debug symbols, but I was not able to make mysqlclient link against that variant (either using transformations in a manifest file or --with-debug-info=mariadb). Suggestions are welcome.

The bug affects the openmolar package.

Marco

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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Marco Rimoldi <rimarko@HIDDEN>
Subject: bug#69064: Acknowledgement (python-mysqlclient: MySQLdb.string_literal
 SIGSEGV)
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Subject: bug#69064: python-mysqlclient: MySQLdb.string_literal SIGSEGV
Resent-From: Marco Rimoldi <rimarko@HIDDEN>
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Date: Mon, 12 Feb 2024 15:19:18 +0100
From: Marco Rimoldi <rimarko@HIDDEN>
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I've set up to test this bug with a more recent version of mariadb, but I must be missing something important about the Guix workflow here. Maybe that could explain the bug as an error on my part, as well. I'd really appreciate your help, because I'm at a loss here.

The steps I've taken so far:

I populated a manifest.scm file along these lines:

(define-public mariadb-test
  (package
    (name "mariadb-test")
    (version "10.11.7")
    [...]
    (build-system cmake-build-system)
    (outputs '("out" "lib" "dev"))
    (arguments
     `(#:tests? #f   ;; tests disabled but passing for the most part
    [...]

(define-public python-mysqlclient-test
  (package
    (name "python-mysqlclient")
    (version "2.2.4")
    [...]
    (build-system pyproject-build-system)
    (arguments '(#:tests? #f))          ;XXX: requires a live database
    (inputs (list pkg-config 
                  `(,mariadb-test "dev")
		  `(,mariadb-test "lib")
                  zlib))
    (propagated-inputs (list `(,mariadb-test "lib")))
    [...]

(define transform
  (options->transformation
   '((with-debug-info . "mariadb-test"))))

(packages->manifest (list gdb
			  python-pdbpp
			  python-3
			  (transform python-mysqlclient-test)
			  (transform mariadb-test)))

I then launched a guix shell and ran the debugger:

guix shell --manifest=manifest.scm
gdb --args "python3 test.py"
(gdb) run
Starting program: /gnu/store/hm1kl7zi0r2nbg1zgh8ywwm0h35h6zfx-profile/bin/python3 test.py
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/gnu/store/ln6hxqjvz6m9gdd9s97pivlqck7hzs99-glibc-2.35/lib/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff75b5f23 in ?? () from /gnu/store/z0c58i28g97z85w986i841l4crbpf8zk-mariadb-10.10.2-lib/lib/libmariadb.so.3

The part that I cannot understand is why the segfault always happens in mariadb-10.10.2-lib, ie. a different package compared to what I declared in the manifest file. This happens after running "guix gc", as well.

Marco

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