rbreaks not working?

Trying to put rbreak:

(gdb) rbreak ^mach_write_.*
Function "mach_write_compressed(unsigned char*, ulint)" not defined in
"/home/midenok/src/mariadb/hagrid/src/storage/xtradb/include/mach0data.ic".
static ulint mach_write_compressed(unsigned char*, ulint);
Function "mach_write_int_type(unsigned char*, unsigned char const*,
ulint, bool)" not defined in
"/home/midenok/src/mariadb/hagrid/src/storage/xtradb/include/mach0data.ic".
static void mach_write_int_type(unsigned char*, unsigned char const*,
ulint, bool);
Function "mach_write_to_1(unsigned char*, ulint)" not defined in
"/home/midenok/src/mariadb/hagrid/src/storage/xtradb/include/mach0data.ic".
static void mach_write_to_1(unsigned char*, ulint);
...


But:

(gdb) break mach_write_compressed(unsigned char*, ulint)
Breakpoint 1 at 0xb446e3: file
/home/midenok/src/mariadb/hagrid/src/storage/xtradb/include/mach0data.ic,
line 210.

Maybe I do something wrong?