Loosen lifetime requirements for single-threaded Scope::spawn
to match the multi-threaded version.
#12073
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Objective
Scope::spawn
,Scope::spawn_on_external
, andScope::spawn_on_scope
have different signatures depending on whether themulti-threaded
feature is enabled. The single-threaded version has a stricter signature that prevents sending theScope
itself to spawned tasks.Solution
Changed the lifetime constraints in the single-threaded signatures from
'env
to'scope
to match the multi-threaded version.This was split off from #11906.