[Tile-serving] [openstreetmap/osm2pgsql] double free or corruption (#745)

[Paul Norman]

```
*** Error in `osm2pgsql': double free or corruption (!prev): 0x00007f52c0000ef0 ***                                                                                [11/1912]
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x70bcb)[0x7f644bfccbcb]
/lib/x86_64-linux-gnu/libc.so.6(+0x76f96)[0x7f644bfd2f96]
/lib/x86_64-linux-gnu/libc.so.6(+0x7778e)[0x7f644bfd378e]
*** Error in `osm2pgsql': double free or corruption (out): 0x00007f52800011d0 ***
======= Backtrace: =========
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9_M_mutateEmmPKcm+0xf0)[0x7f644c932b80]
/lib/x86_64-linux-gnu/libc.so.6(+0x70bcb)[0x7f644bfccbcb]
/lib/x86_64-linux-gnu/libc.so.6(+0x76f96)[0x7f644bfd2f96]
/lib/x86_64-linux-gnu/libc.so.6(+0x7778e)[0x7f644bfd378e]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9_M_appendEPKcm+0x63)[0x7f644c934073]
osm2pgsql(_ZN4geom16osmium_builder_t13add_mp_pointsERKN6osmium11NodeRefListE+0xf3)[0x561e45035333]
osm2pgsql(_ZN4geom16osmium_builder_t15create_polygonsB5cxx11ERKN6osmium4AreaE+0x1e3)[0x561e450361e3]
osm2pgsql(_ZN4geom16osmium_builder_t15get_wkb_polygonB5cxx11ERKN6osmium3WayE+0x460)[0x561e45036a20]
osm2pgsql(_ZN17processor_polygon11process_wayB5cxx11ERKN6osmium3WayE+0xd)[0x561e450202cd]
*** Error in `osm2pgsql': double free or corruption (out): 0x00007f52800013a0 ***
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9_M_mutateEmmPKcm+0xf0)[0x7f644c932b80]
======= Backtrace: =========
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE9_M_appendEPKcm+0x63)[0x7f644c934073]
/lib/x86_64-linux-gnu/libc.so.6(+0x70bcb)[0x7f644bfccbcb]
osm2pgsql(_ZN4geom16osmium_builder_t13add_mp_pointsERKN6osmium11NodeRefListE+0x126)[0x561e45035366]
/lib/x86_64-linux-gnu/libc.so.6(+0x76f96)[0x7f644bfd2f96]
osm2pgsql(_ZN4geom16osmium_builder_t15create_polygonsB5cxx11ERKN6osmium4AreaE+0xosm2pgsql(_ZN14output_multi_t13reprocess_wayEPN6osmium3WayEb+0x197)[0x561e4500ff57]
/lib/x86_64-linux-gnu/libc.so.6(+0x7778e)[0x7f644bfd378e]
osm2pgsql(_ZN4geom16osmium_builder_t15get_wkb_polygonB5cxx11ERKN6osmium3WayE+0x460)[0x561e45036a20]
osm2pgsql(+0x5eb91)[0x561e44fbab91]
osm2pgsql(_ZN14output_multi_t13reprocess_wayEPN6osmium3WayEb+0x1b4)[0x561e4500ff74]
osm2pgsql(_ZN17processor_polygon11process_wayB5cxx11ERKN6osmium3WayE+0xd)[0x561e450202cd]
osm2pgsql(_ZNSt17_Function_handlerIFSt10unique_ptrINSt13__future_base12_Result_baseENS2_8_DeleterEEvENS1_12_Task_setterIS0_INS1_7_ResultIvEES3_ESt12_Bind_simpleIFPFvRKSt6ve
ctorISt10shared_ptrI8output_tESaISE_EERSt5stackI13pending_job_tSt5dequeISK_SaISK_EEERmRSt5mutexibESt17reference_wrapperISH_ESV_ISO_ESV_ImESV_ISR_EbbEEvEEE9_M_invokeERKSt9_A
ny_data+0x30)[0x561e44fbf2e0]
osm2pgsql(+0x5eb91)[0x561e44fbab91]
osm2pgsql(_ZN14output_multi_t13reprocess_wayEPN6osmium3WayEb+0x197)[0x561e4500ff57]
osm2pgsql(_ZNSt13__future_base13_State_baseV29_M_do_setEPSt8functionIFSt10unique_ptrINS_12_Result_baseENS3_8_DeleterEEvEEPb+0x1b)[0x561e44fbfa9b]
osm2pgsql(_ZNSt17_Function_handlerIFSt10unique_ptrINSt13__future_base12_Result_baseENS2_8_DeleterEEvENS1_12_Task_setterIS0_INS1_7_ResultIvEES3_ESt12_Bind_simpleIFPFvRKSt6ve
ctorISt10shared_ptrI8output_tESaISE_EERSt5stackI13pending_job_tSt5dequeISK_SaISK_EEERmRSt5mutexibESt17reference_wrapperISH_ESV_ISO_ESV_ImESV_ISR_EbbEEvEEE9_M_invokeERKSt9_A
ny_data+0x30)[0x561e44fbf2e0]
osm2pgsql(+0x5eb91)[0x561e44fbab91]
/lib/x86_64-linux-gnu/libpthread.so.0(+0xe739)[0x7f644d888739]
osm2pgsql(_ZNSt13__future_base13_State_baseV29_M_do_setEPSt8functionIFSt10unique_ptrINS_12_Result_baseENS3_8_DeleterEEvEEPb+0x1b)[0x561e44fbfa9b]
osm2pgsql(_ZNSt17_Function_handlerIFSt10unique_ptrINSt13__future_base12_Result_baseENS2_8_DeleterEEvENS1_12_Task_setterIS0_INS1_7_ResultIvEES3_ESt12_Bind_simpleIFPFvRKSt6ve
ctorISt10shared_ptrI8output_tESaISE_EERSt5stackI13pending_job_tSt5dequeISK_SaISK_EEERmRSt5mutexibESt17reference_wrapperISH_ESV_ISO_ESV_ImESV_ISR_EbbEEvEEE9_M_invokeERKSt9_A
ny_data+0x30)[0x561e44fbf2e0]
osm2pgsql(_ZNSt6thread11_State_implISt12_Bind_simpleIFZNSt13__future_base17_Async_state_implIS1_IFPFvRKSt6vectorISt10shared_ptrI8output_tESaIS7_EERSt5stackI13pending_job_tS
t5dequeISD_SaISD_EEERmRSt5mutexibESt17reference_wrapperISA_ESO_ISH_ESO_ImESO_ISK_EbbEEvEC4EOSU_EUlvE_vEEE6_M_runEv+0xd2)[0x561e44fc0b52]
/lib/x86_64-linux-gnu/libpthread.so.0(+0xe739)[0x7f644d888739]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(+0xb9e6f)[0x7f644c8cee6f]
osm2pgsql(_ZNSt13__future_base13_State_baseV29_M_do_setEPSt8functionIFSt10unique_ptrINS_12_Result_baseENS3_8_DeleterEEvEEPb+0x1b)[0x561e44fbfa9b]
osm2pgsql(_ZNSt6thread11_State_implISt12_Bind_simpleIFZNSt13__future_base17_Async_state_implIS1_IFPFvRKSt6vectorISt10shared_ptrI8output_tESaIS7_EERSt5stackI13pending_job_tS
t5dequeISD_SaISD_EEERmRSt5mutexibESt17reference_wrapperISA_ESO_ISH_ESO_ImESO_ISK_EbbEEvEC4EOSU_EUlvE_vEEE6_M_runEv+0xd2)[0x561e44fc0b52]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x7424)[0x7f644d881424]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(+0xb9e6f)[0x7f644c8cee6f]
/lib/x86_64-linux-gnu/libpthread.so.0(+0xe739)[0x7f644d888739]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x5f)[0x7f644c0449bf]
======= Memory map: ========
/lib/x86_64-linux-gnu/libc.so.6(clone+0x5f)[0x7f644c0449bf]
======= Memory map: ========
```

This is with 2b72b21 + the diff in https://github.com/openstreetmap/osm2pgsql/issues/726#issuecomment-294586761, built with `-DCMAKE_BUILD_TYPE=Release` and imported with `osm2pgsql -E 3857  --flat-nodes $PLANET_DIR/nodes.bin --cache 35000 --number-processes 4 --create --slim -d ct --output multi --style cleartables.json -G "$PLANET_DIR/osm-data.osm.pbf"`

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