Bug: high CPU usage on windows with cygwin and mingw

Hello,

I'm using firefox 28 and after opening a few youtube videos polipo.exe 
will use 100% of 1 of 4 CPU cores.


This high CPU Usage continues even if I close firefox.


Backtrace #1:
Thread 1 (Thread 5680.0x1418):
#0  0x74d36a5d in KERNELBASE!InterlockedIncrement () from 
C:\Windows\syswow64\KernelBase.dll
No symbol table info available.
#1  0x75162f74 in WahReferenceContextByHandle () from 
C:\Windows\syswow64\ws2_32.dll
No symbol table info available.
#2  0x75162fd3 in WahReferenceContextByHandle () from 
C:\Windows\syswow64\ws2_32.dll
No symbol table info available.
#3  0x75166b50 in recv () from C:\Windows\syswow64\ws2_32.dll
No symbol table info available.
#4  0x0042fc76 in win32_read_socket (fd=552, buf=0x73b000, n=4095) at 
mingw.c:296
         rc = 4975072
#5  0x00404edd in do_scheduled_stream (status=0, event=0xa4c560) at 
io.c:360
         request = 0xa4c570
         rc = 10798432
         done = -717324288
         i = 1
         iov = {{iov_base = 0x73b000, iov_len = 4095}, {iov_base = 
0x28fed4, iov_len = 8023949}, {iov_base = 0x13f560,
             iov_len = 8023949}, {iov_base = 0x28fed4, iov_len = 
2686552}, {
             iov_base = 0x42f7db <win32_gettimeofday+229>, iov_len = 
1566919322}, {iov_base = 0xa4c560,
             iov_len = 2686552}}
         chunk_header_len = 1566919322
         chunk_header = "\000\000@B\017\000ç÷\004"
         len12 = 4095
         len123 = 4095
#6  0x00403f2b in eventLoop () at event.c:713
         j = 14
         sleep_time = {tv_sec = 1398474291, tv_usec = 788042}
         timeout = {tv_sec = 1308, tv_usec = 521048}
         rc = 2
         i = 0
         done = 1
         n = 1
         event = 0xa4c560
         fd0 = 14
#7  0x00410b88 in main (argc=1, argv=0xa41790) at main.c:165
         listener = 0x4df170
         i = 1
         rc = 0
         expire = 0
         printConfig = 0


Backtrace #2:
Thread 1 (Thread 5680.0x1418):
#0  0x74d43dba in KERNELBASE!FlsGetValue () from 
C:\Windows\syswow64\KernelBase.dll
No symbol table info available.
#1  0x761ca529 in msvcrt!_lock () from C:\Windows\syswow64\msvcrt.dll
No symbol table info available.
#2  0x0042fc8f in win32_read_socket (fd=552, buf=0x340000, n=4095) at 
mingw.c:298
         rc = -1
#3  0x00404edd in do_scheduled_stream (status=0, event=0xa4c6c8) at 
io.c:360
         request = 0xa4c6d8
         rc = 10798792
         done = -717324288
         i = 1
         iov = {{iov_base = 0x340000, iov_len = 4095}, {iov_base = 
0x28fed4, iov_len = 8023949}, {iov_base = 0x116138,
             iov_len = 8023949}, {iov_base = 0x28fed4, iov_len = 
2686552}, {
             iov_base = 0x42f7db <win32_gettimeofday+229>, iov_len = 
1736190004}, {iov_base = 0xa4c6c8,
             iov_len = 2686552}}
         chunk_header_len = 1736190004
         chunk_header = "\000\000@B\017\000ç÷\004"
         len12 = 4095
         len123 = 4095
#4  0x00403f2b in eventLoop () at event.c:713
         j = 2
         sleep_time = {tv_sec = 1398474291, tv_usec = 788042}
         timeout = {tv_sec = 1139, tv_usec = 249366}
         rc = 2
         i = 2
         done = 1
         n = 1
         event = 0xa4c6c8
         fd0 = 0
#5  0x00410b88 in main (argc=1, argv=0xa41790) at main.c:165
         listener = 0x4df170
         i = 1
         rc = 0
         expire = 0
         printConfig = 0


Backtrace #3:
Thread 1 (Thread 5680.0x1418):
#0  0x7722f921 in ?? ()
No symbol table info available.
#1  0x75166b87 in ?? ()
No symbol table info available.
#2  0x0042fc76 in win32_read_socket (fd=552, buf=0x340000, n=4095) at 
mingw.c:296
         rc = 4975064
#3  0x00404edd in do_scheduled_stream (status=0, event=0xa4c6c8) at 
io.c:360
         request = 0xa4c6d8
         rc = 10798792
         done = -717324288
         i = 1
         iov = {{iov_base = 0x340000, iov_len = 4095}, {iov_base = 
0x28fed4, iov_len = 8023949}, {iov_base = 0xf9830,
             iov_len = 8023949}, {iov_base = 0x28fed4, iov_len = 
2686552}, {
             iov_base = 0x42f7db <win32_gettimeofday+229>, iov_len = 
1852468654}, {iov_base = 0xa4c6c8,
             iov_len = 2686552}}
         chunk_header_len = 1852468654
         chunk_header = "\000\000@B\017\000ç÷\004"
         len12 = 4095
         len123 = 4095
#4  0x00403f2b in eventLoop () at event.c:713
         j = 2
         sleep_time = {tv_sec = 1398474291, tv_usec = 788042}
         timeout = {tv_sec = 1022, tv_usec = 970716}
         rc = 2
         i = 0
         done = 1
         n = 1
         event = 0xa4c6c8
         fd0 = 2
#5  0x00410b88 in main (argc=1, argv=0xa41790) at main.c:165
         listener = 0x4df170
         i = 1
         rc = 0
         expire = 0
         printConfig = 0

---

Do you need any other info?

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