/ filesystem on worker13 is full and the host cannot process Mercurial data anymore.
The culprit seems to be the Mercurial loader itself.
/ tmp (part of the / filesystem) contains huge files and directories:
```
12G sqldict6a19bb
17G sqldict89fc16
786M sqldict8f09fa
634M sqldictc9c674
4.0K swh.loader.deposit
14M swh.loader.mercurial.10o7dn_1
4.0M swh.loader.mercurial.31j86o5f
4.0K swh.loader.mercurial.35gljinc
24M swh.loader.mercurial.4p1f_0o0
52K swh.loader.mercurial.d0y8x43e
50M swh.loader.mercurial.dzr2_6_e
135M swh.loader.mercurial.e1_1ejhy
100M swh.loader.mercurial.g5d8i9y2
15M swh.loader.mercurial.h_a2csx2
64M swh.loader.mercurial.jz9z34ow
7.5M swh.loader.mercurial.lcpqso3x
128M swh.loader.mercurial.mjp_zken
919M swh.loader.mercurial.mzlrf1cf
27M swh.loader.mercurial.o4mn1ran
64M swh.loader.mercurial.ox9etasm
64M swh.loader.mercurial.sgyhmxh3
160K swh.loader.mercurial.tk3ozyv2
35M swh.loader.mercurial.wd3f3t4i
26M swh.loader.mercurial.yo2tfris
12K tmp7w5wd0ar
588K tmpiary52zt
588K tmpmiis9pv7
```