Bug 936620 – app-emulation/qemu-9.0.2 fails to compile with >=dev-python/sphinx-8: Handler <function write_depfile at 0x75d530beb560> for event build-finished threw an exception (exception: unsupported operand type(s) for +: PosixPath and str)

• Status: CONFIRMED
• Product: Gentoo Linux

[Description Agostino Sarubbo 2024-07-25 09:12:29 UTC]

https://blogs.gentoo.org/ago/2020/07/04/gentoo-tinderbox/

Issue: app-emulation/qemu-9.0.2 fails to compile.
Discovered on: amd64 (internal ref: gcc15_tinderbox)
System: GCC-15-SYSTEM (https://wiki.gentoo.org/wiki/Project:Tinderbox/Common_Issues_Helper#GCC-15)

Info about the issue:
https://wiki.gentoo.org/wiki/Project:Tinderbox/Common_Issues_Helper#CF0014

[Comment 1 Agostino Sarubbo 2024-07-25 09:12:31 UTC]

Created attachment 898291 [details]
build.log.xz

build log and emerge --info (compressed because it exceeds attachment limit, use 'xzless' to read it)

[Comment 2 Agostino Sarubbo 2024-07-25 09:12:32 UTC]

Error(s) that match a know pattern in addition to what has been reported in the summary:


FAILED: docs/docs.stamp 
FAILED: tests/qapi-schema/doc-good.txt 
Program /usr/bin/gdbus-codegen found: NO
Program cgcc found: NO
Program iasl found: NO
Run-time dependency appleframeworks found: NO (tried framework)
Run-time dependency blkio found: NO (tried pkgconfig)
Run-time dependency canokey-qemu found: NO (tried pkgconfig)
Run-time dependency gvnc-1.0 found: NO (tried pkgconfig)
Run-time dependency libdaxctl found: NO (tried pkgconfig)
Run-time dependency libpmem found: NO (tried pkgconfig)
Run-time dependency libxdp found: NO (tried pkgconfig)
Run-time dependency rutabaga_gfx_ffi found: NO (tried pkgconfig)
Run-time dependency sndio found: NO (tried pkgconfig)
Run-time dependency spice-protocol found: NO (tried pkgconfig)
Run-time dependency sysprof-capture-4 found: NO (tried pkgconfig)
Run-time dependency u2f-emu found: NO (tried pkgconfig)

[Comment 3 Eli Schwartz 2024-07-25 22:05:28 UTC]

Somewhere inside this:

https://github.com/qemu/qemu/blob/5ebde3b5c00e15f560f73055fac4ab31c0cac6d2/docs/sphinx/depfile.py#L35-L54

it is getting a Path object.

https://www.sphinx-doc.org/en/master/extdev/envapi.html#sphinx.environment.BuildEnvironment.doc2path looks very suspicious. Probably a sphinx update.

...

Yes, it looks like this: https://github.com/sphinx-doc/sphinx/commit/de15d61a46daaaa2b0a0e341cdb4e0abe107e012

sphinx 8 returns Path where it used to use str, and qemu is using that to concatenate to a string and failing.

[Comment 4 Andreas K. Hüttel 2025-02-23 19:57:02 UTC]

Is this still happening?

[Comment 5 Eli Schwartz 2025-02-23 20:21:28 UTC]

It was fixed in QEMU 9.1, and simultaneously sphinx backed out the change and made it print a deprecation warning instead. That deprecation warning is still present in sphinx git `master`.

At some point sphinx will probably drop support again, but they haven't done so yet. If/when they do, old versions of QEMU will fail to build, for people who are afraid to upgrade to our nice lovely stabilized qemu-9.1.2