Espeak crashed when compiling phonemes

[nlpguyz]

I am trying to compile espeak-ng from the master branch. After installing dependencies, running autogen.sh, configure and so on, I could get the binary of espeak-ng but after that, make failed with the following error:

ESPEAK_DATA_PATH=/home/osboxes/work/espeakNG/espeak-ng src/espeak-ng --compile-intonations &&
ESPEAK_DATA_PATH=/home/osboxes/work/espeakNG/espeak-ng src/espeak-ng --compile-phonemes &&
touch phsource/phonemes.stamp
Compiled 26 intonation tunes: 0 errors.
/bin/bash: line 2: 80909 Segmentation fault (core dumped) ESPEAK_DATA_PATH=/home/osboxes/work/espeakNG/espeak-ng src/espeak-ng --compile-phonemes
Makefile:1861: recipe for target 'phsource/phonemes.stamp' failed
make[1]: *** [phsource/phonemes.stamp] Error 139

---- end of compile error ----

I fired up gdb64 to run the binary "src/.libs/espeak-ng" with the same environment variables and arguments, and found it appeared to be a dictionary processing error:

Program received signal SIGSEGV, Segmentation fault.
InitGroups (tr=0x619a70) at src/libespeak-ng/dictionary.c:197
197 while (*p != RULE_GROUP_END)
(gdb) bt
#0 InitGroups (tr=0x619a70) at src/libespeak-ng/dictionary.c:197
#1 LoadDictionary (tr=tr@entry=0x619a70, name=name@entry=0x7fffffffd7a0 "en", no_error=no_error@entry=0)
at src/libespeak-ng/dictionary.c:259
#2 0x00007ffff7b79d3c in LoadVoice (vname=vname@entry=0x7ffff7b9e1aa "", control=control@entry=0) at src/libespeak-ng/voices.c:910
#3 0x00007ffff7b4d653 in espeak_ng_CompilePhonemeDataPath (rate=rate@entry=22050, source_path=source_path@entry=0x0,
destination_path=destination_path@entry=0x0, log=0x7ffff7b33620 <IO_2_1_stdout>, context=context@entry=0x7fffffffdef0)
at src/libespeak-ng/compiledata.c:2534
#4 0x00007ffff7b4e61f in espeak_ng_CompilePhonemeData (rate=rate@entry=22050, log=,
context=context@entry=0x7fffffffdef0) at src/libespeak-ng/compiledata.c:2505
#5 0x00000000004022bb in main (argc=2, argv=0x7fffffffe428) at src/espeak-ng.c:551

Do you have any idea why it happens? My environment is

Ubuntu 16.04.2 LTS
gcc (Ubuntu 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609

Thanks!

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