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Don't error if we don't have line information #634

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merged 2 commits into from
Jul 18, 2024
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Don't error if we don't have line information #634

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b723d6c
Don't error if we don't have line information
Keno Jun 20, 2024
90a83d1
propagate the `nothing` case
timholy Jul 18, 2024
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7 changes: 5 additions & 2 deletions src/utils.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -277,12 +277,14 @@ function linetable(arg)
return ci.linetable::Union{Vector{Core.LineInfoNode},Vector{Any}} # issue #264
end # @static if
end
function linetable(arg, i::Integer; macro_caller::Bool=false)::Union{Expr,LineTypes}
function linetable(arg, i::Integer; macro_caller::Bool=false)::Union{Expr,Nothing,LineTypes}
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linetable(arg, ::Integer) is used in the other places too, like linenumber(::FrameCode, pc), so better to handle the nothing case there too?

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I guess the other option would be to synthesize a special LineNumber node that indicates the absence of information. That way clients that don't care don't have to worry about it

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I like the nothing option since anything that isn't prepared will hard-error.

lt = linetable(arg)
@static if VERSION ≥ v"1.12.0-DEV.173"
# TODO: decode the linetable at this frame efficiently by reimplementing this here
# TODO: get the contextual name from the parent, rather than returning "n/a" (which breaks Cthulhu)
return Base.IRShow.buildLineInfoNode(lt, :var"n/a", i)[1] # ignore all inlining / macro expansion / etc :(
nodes = Base.IRShow.buildLineInfoNode(lt, :var"n/a", i)
isempty(nodes) && return nothing
return nodes[1] # ignore all inlining / macro expansion / etc :(
else # VERSION < v"1.12.0-DEV.173"
lin = lt[i]::Union{Expr,LineTypes}
if macro_caller
Expand Down Expand Up @@ -387,6 +389,7 @@ function CodeTracking.whereis(framecode::FrameCode, pc::Int; kwargs...)
codeloc = codelocation(framecode.src, pc)
codeloc == 0 && return nothing
lineinfo = linetable(framecode, codeloc; kwargs...)
lineinfo === nothing && return nothing
m = framecode.scope
return isa(m, Method) ? whereis(lineinfo, m) : (getfile(lineinfo), getline(lineinfo))
end
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