Build errors under Python 3.7

[felixonmars]

building 'hunter._predicates' extension
gcc -pthread -DNDEBUG -g -fwrapv -O3 -Wall -march=x86-64 -mtune=generic -O2 -pipe -fstack-protector-strong -fno-plt -D_FORTIFY_SOURCE=2 -fPIC -Isrc/hunter -I/usr/include/python3.7m -c src/hunter/_predicates.c -o build/temp.linux-x86_64-3.7/src/hunter/_predicates.o
src/hunter/_predicates.c: In function ‘__Pyx__ExceptionSwap’:
src/hunter/_predicates.c:24436:24: error: ‘PyThreadState’ {aka ‘struct _ts’} has no member named ‘exc_type’; did you mean ‘curexc_type’?
     tmp_type = tstate->exc_type;
                        ^~~~~~~~
                        curexc_type
src/hunter/_predicates.c:24437:25: error: ‘PyThreadState’ {aka ‘struct _ts’} has no member named ‘exc_value’; did you mean ‘curexc_value’?
     tmp_value = tstate->exc_value;
                         ^~~~~~~~~
                         curexc_value
src/hunter/_predicates.c:24438:22: error: ‘PyThreadState’ {aka ‘struct _ts’} has no member named ‘exc_traceback’; did you mean ‘curexc_traceback’?
     tmp_tb = tstate->exc_traceback;
                      ^~~~~~~~~~~~~
                      curexc_traceback
src/hunter/_predicates.c:24439:13: error: ‘PyThreadState’ {aka ‘struct _ts’} has no member named ‘exc_type’; did you mean ‘curexc_type’?
     tstate->exc_type = *type;
             ^~~~~~~~
             curexc_type
src/hunter/_predicates.c:24440:13: error: ‘PyThreadState’ {aka ‘struct _ts’} has no member named ‘exc_value’; did you mean ‘curexc_value’?
     tstate->exc_value = *value;
             ^~~~~~~~~
             curexc_value
src/hunter/_predicates.c:24441:13: error: ‘PyThreadState’ {aka ‘struct _ts’} has no member named ‘exc_traceback’; did you mean ‘curexc_traceback’?
     tstate->exc_traceback = *tb;
             ^~~~~~~~~~~~~
             curexc_traceback

[serhiy-storchaka]

These files are generated by Cython. Upgrade Cython to the version supporting Python 3.7 and regenerate files.