ref: b9c1eab2e63e1c9b38d1c6a7a2170016e7f0a56c dir: /sys/src/libc/port/_assert.c/
#include <u.h> #include <libc.h> void (*__assert)(char*); void _assert(char *s) { if(__assert) (*__assert)(s); fprint(2, "assert failed: %s\n", s); abort(); }