catch_backtrace

catch_backtrace()

Get the backtrace of the current exception, for use within catch blocks.

Examples

julia> try
           error("Oops, something went wrong!")
       catch err
           bt = catch_backtrace()
           println(bt)
       end
ERROR: Oops, something went wrong!
Stacktrace:
 [1] error(::String) at ./error.jl:33
 [2] top-level scope at REPL[1]:2
 [3] eval(::Module, ::Any) at ./boot.jl:331
 [4] eval_user_input(::Any, ::REPL.REPLBackend) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.6/REPL/src/REPL.jl:139
 [5] repl_backend_loop(::Any) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.6/REPL/src/REPL.jl:200
 [6] start_repl_backend(::Any) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.6/REPL/src/REPL.jl:185
 [7] run_repl(::Any) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.6/REPL/src/REPL.jl:303
 [8] (::Base.var"#848#850"{Bool, Base.REPL.REPLBackend})() at ./task.jl:406

julia> try
           throw(ErrorException("Custom error"))
       catch err
           bt = catch_backtrace()
           println(bt)
       end
ErrorException("Custom error")
Stacktrace:
 [1] top-level scope at REPL[2]:2
 [2] eval(::Module, ::Any) at ./boot.jl:331
 [3] eval_user_input(::Any, ::REPL.REPLBackend) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.6/REPL/src/REPL.jl:139
 [4] repl_backend_loop(::Any) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.6/REPL/src/REPL.jl:200
 [5] start_repl_backend(::Any) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.6/REPL/src/REPL.jl:185
 [6] run_repl(::Any) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.6/REPL/src/REPL.jl:303
 [7] (::Base.var"#848#850"{Bool, Base.REPL.REPLBackend})() at ./task.jl:406

The catch_backtrace() function is used within catch blocks to retrieve the backtrace of the current exception. It can be useful for logging or debugging purposes when handling exceptions.

In the first example, an error is intentionally thrown using the error function. The catch_backtrace() function is then called within the catch block to retrieve the backtrace, which is then printed.

In the second example, a custom error is thrown using throw. Again, the catch_backtrace() function is used within the catch block to retrieve and print the backtrace.

Note that the backtrace shows the sequence of function calls leading up to the error. This information can help in identifying the source of the error and understanding the sequence of function calls that led to the exception.

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catch_backtrace

Examples

See Also

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