`@inbounds` pessimizes closure

[affans]

Consider the following function. Add @inbounds to this line to trrigger it

function bar()
       x=[2]
       for i in 1:10_000 #Add @inbounds to this line to trrigger it
       (m->2i)(x)
       end
 end

@oxinabox also found the bug is triggered with @sync and @time as well.

[oxinabox]

For record keeping purposes:
@simonbyrne noticed this as a special case of #15276