Slight improvement to type-stability of StackTraces.lookup
#41847
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I was playing around with SnoopCompile and came across the
StackTraces.lookupfunction (that I don't really know what is doing - but it featured non-negligibly in PyCall precompile time).I noticed that there was a slight type-instability in the
linevariable since the if-else statement in one cases branches toline = meth.linewheremeth::Methodandfieldtype(Method, :line) == Int32and in the other case branches to0::Int. This fixes that.