Freeze if Gz.deflate->deflate used twice
Imported from http://bugzilla.roxen.com/bugzilla/show_bug.cgi?id=1843
Reported by Andreas Lange, Roxen IS lange@roxen.com
megalon:~$ gdb ~/pike/7.2.101/bin/pike
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(gdb) r
Starting program: /home/lange/pike/7.2.101/bin/pike
[New LWP 1]
[New LWP 2]
[New LWP 3]
[New LWP 4]
[New LWP 5]
Pike v7.2 release 101 running Hilfe v2.0 (Incremental Pike Frontend)
> function g = Gz.deflate()->deflate;
Result: deflate
> g("1");
Result: "x\234""3\4\0\0""2\0""2"
> g("2");[Here it stops]
Program received signal SIGTERM, Terminated.
0xff36fff0 in thr_self () from /usr/lib/libthread.so.1
(gdb) bt
#0 0xff36fff0 in thr_self () from /usr/lib/libthread.so.1
#1 0xfe7d16f0 in do_deflate (buf=0xffbee968, this=0x35e828, flush=4)
at /home/lange/Pike/7.2/src/modules/Gz/zlibmod.c:156
#2 0xfe7d1920 in gz_deflate (args=1)
at /home/lange/Pike/7.2/src/modules/Gz/zlibmod.c:237
#3 0x49d34 in mega_apply (type=APPLY_STACK, args=1, arg1=0x2e2444,
arg2=0x1)
at /home/lange/Pike/7.2/src/interpret.c:1228
#4 0x48164 in eval_instruction_without_debug (pc=0x307172 "\232\"\177-")
at /home/lange/Pike/7.2/src/interpret_functions.h:1489
#5 0x4a140 in mega_apply (type=APPLY_STACK, args=0, arg1=0x0, arg2=0x2)
at /home/lange/Pike/7.2/src/interpret.c:799
The code around this is
154: THREADS_ALLOW();
155: ret=deflate(& this->gz, flush);
156: THREADS_DISALLOW();