Thread-safe logging with Arduino

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I am trying to log some information regarding the state of my program, but I sometimes get unexpected results:

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[ 24477][I][main.cpp:101] listen_table(): got 1, space remaining: 63

[ 24488][I][main.cpp:60] listen_goal(): received T

[ 24493][I][m[a i2n4.4c9p3p]:[7I8]][ mlaiisnt.ecnp_pg:o1a0l3(]) :l iFsitneins_hteadb lsee(n)d:i ntga.b

Is this indicating some sort of memory corruption, or is this because of some context switching/thread safety issues of using log_i()?