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End of Life Ruby 3.1 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

Thread::Backtrace::Location#lineno

lineno

Returns the line number of this frame.

For example, using caller_locations.rb from Thread::Backtrace::Location

Example
loc = c(0..1).first
loc.lineno #=> 2
See also #label #path #inspect #to_s also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.0