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iobuffer: copyline: type assert Int to prevent invalidation #57848

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Mar 21, 2025
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iobuffer: copyline: type assert Int to prevent invalidation #57848

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2 changes: 1 addition & 1 deletion base/iobuffer.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -643,7 +643,7 @@ function _copyline(out::IO, io::GenericIOBuffer; keep::Bool=false)
data = view(io.data, io.ptr:io.size)
# note: findfirst + copyto! is much faster than a single loop
# except for nout ≲ 20. A single loop is 2x faster for nout=5.
nout = nread = something(findfirst(==(0x0a), data), length(data))
nout = nread = something(findfirst(==(0x0a), data), length(data))::Int
if !keep && nout > 0 && data[nout] == 0x0a
nout -= 1
nout > 0 && data[nout] == 0x0d && (nout -= 1)
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