NAME     
| 
    assert – check program invariants | 
SYNOPSIS     
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    #include <u.h> #include <libc.h> #define assert(cond) if(cond);else _assert("cond") 
    void _assert(char* cond)  | 
DESCRIPTION     
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    Assert is a preprocessor macro that (via _assert) prints a message
    and calls abort when cond is false. | 
SOURCE     
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    /sys/src/libc/port/_assert.c |