Pin nightly version in coverage job #433
Merged
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The coverage ci job uses the rust nightly channel to enable the coverage
collection. However, building with nightly has recently stopped working
because of a change breaking num-bigint (see
rust-num/num-bigint#218 for more details).
Until the rustc nightly behavior is reverted or a new num-bigint version
is released that is compatible with the new nightly behavior this commit
pins the nightly version used in the coverage job to a version prior to
the failure.