think I figured it out...

bin/ch-run.c

@@ -132,8 +132,7 @@ int main(int argc, char *argv[])
 
    privs_verify_invoking();
 
-   //Z_ (atexit(warnings_reprint));
-   Z_ (atexit(test_exit));
+   Z_ (atexit(warnings_reprint));
 
 
 #ifdef ENABLE_SYSLOG

bin/ch_misc.c

@@ -702,22 +702,16 @@ void version(void)
 size_t string_append(char *addr, char *str, size_t size, size_t offset)
 {
    size_t written = strlen(str) + 1;
-   size_t foo = offset + written - 1;
-   printf("test num: %ld\n", foo);
 
    if (size > (offset + written - 1))  // there is space
-   {
-      printf("got past if\n");
       memcpy(addr + offset, str, written);
-   }
 
    return written;
 }
 
 /* Reprint messages stored in “warnings” memory buffer. */
 void warnings_reprint(void)
 {
-   printf("calling warings_reprint\n");
    size_t offset = 0;
    int warn_ct = buf_strings_count(warnings, warnings_size);
 

test/run/ch-run_misc.bats

@@ -1063,8 +1063,7 @@ EOF
     run ch-run --warnings=1
     echo "$output"
     [[ $status -eq 0 ]]
-    #[[ $(echo "$output" | grep -Fc 'this is warning 0!') -eq 2 ]]
-    [[ $(echo "$output" | grep -Ec 'this is warning [0-9]*!') -eq 2 ]]
+    [[ $(echo "$output" | grep -Fc 'this is warning 0!') -eq 2 ]]
 
     # Warnings list is a statically sized memory buffer. Ensure it works as
     # intended by printing more warnings than can be saved to this buffer and