bug#49171: OCaml packages not building (due to updated python-pyyaml)

[Xinglu Chen <public@yoctocell.xyz>]

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On Tue, Jun 22 2021, pukkamustard wrote:

> Hi Guix,
>
> With commit ac02d423d3fcb11048ee2e4a02626fca40cf1419, which 
> updated python-pyyaml to 5.4.1 (from 5.3.1) lot of OCaml packages 
> fail to build.
>
> This seems to be due to ocaml-dose3 that has python2-pyyaml as 
> dependency for tests. ocaml-dose3 is a dependency of opam - a 
> dependency of many OCaml packages.
>
> The output when trying to build ocaml-dose3:
>
> ----------------------------------------------------------
> phase `build' succeeded after 14.5 seconds
> starting phase `check'
> /tmp/guix-build-ocaml-dose3-5.0.1.drv-0/dose3-5.0.1
> ocamlbuild  -j 10 applications/apps.otarget
> # No parallelism done
> make testlib
> make[1]: Entering directory 
> '/tmp/guix-build-ocaml-dose3-5.0.1.drv-0/dose3-5.0.1'
> echo
>
> make[1]: Leaving directory 
> '/tmp/guix-build-ocaml-dose3-5.0.1.drv-0/dose3-5.0.1'
> applications/dose-tests.py applications/dose-tests.list
> Traceback (most recent call last):
>   File "applications/dose-tests.py", line 17, in <module>
>     warning('YAML C-library not available, falling back to 
>     python')
> NameError: name 'warning' is not defined
> make: *** [Makefile:206: test] Error 1
> command "make" "test" 
> "LIBDIR=/gnu/store/v939nvdn67cdgb7rjkyvplfw1qr2hkjl-ocaml-dose3-5.0.1/lib/ocaml/site-lib" 
> failed with status 2
> note: keeping build directory 
> `/tmp/guix-build-ocaml-dose3-5.0.1.drv-3'
> builder for 
> `/gnu/store/lybbyb38k0009jrbviymq88vi6xak5ii-ocaml-dose3-5.0.1.drv' 
> failed with exit code 1
> build of 
> /gnu/store/lybbyb38k0009jrbviymq88vi6xak5ii-ocaml-dose3-5.0.1.drv 
> failed
> View build log at 
> '/var/log/guix/drvs/ly/bbyb38k0009jrbviymq88vi6xak5ii-ocaml-dose3-5.0.1.drv.bz2'.
> guix build: error: build of 
> `/gnu/store/lybbyb38k0009jrbviymq88vi6xak5ii-ocaml-dose3-5.0.1.drv' 
> failed
> ----------------------------------------------------------
>
> This seems to also be what CI is encoutering: 
> https://ci.guix.gnu.org/build/623375/details
>
> Any ideas? Any other packages failing for the same reason?
>
> Would disabling tests for ocaml-dose3 be an acceptable quick hack?
>
> Cheers,
> pukkamustard

I think this was fixed in commit
91b29aa37394b660117e1d79927621db1344b7fe (gnu: ocaml-dose3: Fix tests.),
do you think we can close the issue?

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