[bug-gawk] Bug in gawk 4.0.0 when compiled for Windows 7 with mingw32

[Jack Pugh]

GNU Awk version 4.0.0 compiled with mingw32 aborts when 
trying to compile /^[\xA0 ]+/. This did not occur with 
version 3.1.84. /^[\\xA0 ]+/ in version 4.0.0 produces the 
desired results. Debugging with gdb produces:

Program received signal SIGSEGV, Segmentation fault.
0x0042d5d2 in setbit (c=0x22f6fc, b=4294967200) at dfa.c:489
>>c:\users\jack\projects\gawk-4.0.0mg\dfa.c:489:19012:beg:0x42d5d2

(gdb) bt 12
#0  0x0042d5d2 in setbit (c=0x22f6fc, b=4294967200) at dfa.c:489
#1  setbit_case_fold_c (b=-96, c=0x22f6fc) at dfa.c:613
#2  0x0042f2ab in parse_bracket_exp () at dfa.c:1045
#3  lex () at dfa.c:1377
#4  0x0043059e in atom () at dfa.c:1674
#5  closure () at dfa.c:1731
#6  0x0043086c in branch () at dfa.c:1770
#7  0x004308b0 in regexp () at dfa.c:1781
#8  0x0043098c in dfaparse (s=0x3dac20 "^[  ]+", len=6, 
d=0x8f69b0)
    at dfa.c:1816
#9  0x00432a53 in dfacomp (s=0x3dac20 "^[  ]+", len=6, 
d=0x8f69b0,
    searchflag=1) at dfa.c:3495
#10 0x0041f62d in make_regexp (s=0x8f6108 "^[\\xA0 ]+", 
len=6, ignorecase=0,
    dfa=1, canfatal=0) at re.c:232
#11 0x00421f36 in make_regnode (type=2, exp=<optimized out>) 
at awkgram.y:4559

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If I can be of any further help please contact me.

Jack Pugh