[Assist] icu 62.1-1 breaks dependency icu<62 required by iceweasel

[Rudolf Dovičín]

I cannot upgrade ICU due conflict with Iceweasel:

# LANG=C; date -u +%FT%T%:z; pacman -Syu
2018-08-09T08:20:06+00:00
:: Synchronizing package databases...
 nonprism is up to date
 libre is up to date
 core is up to date
 extra is up to date
 community is up to date
 pcr is up to date
 libre-multilib is up to date
 multilib is up to date
 kernels is up to date
:: Starting full system upgrade...
resolving dependencies...
looking for conflicting packages...
error: failed to prepare transaction (could not satisfy dependencies)
:: installing icu (62.1-1) breaks dependency 'icu<62' required by iceweasel

Is it anticipated behaviour, because working on newer version of
Iceweasel is in progress?
Or is unexpected error somewhere?
-- 
Rudolf Dovičín
Matice slovenskej 1260/4-7
957 04  Bánovce nad Bebravou 4
SLOVENSKO
mailto:Rudolf.Dovicin at Gmail.com
(cellular: +421 940 872 846, short messages only)