Fix table result when source and destination on same one-way segment#5828
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danpat merged 2 commits intoProject-OSRM:masterfrom Oct 7, 2020
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Fix table result when source and destination on same one-way segment#5828danpat merged 2 commits intoProject-OSRM:masterfrom
danpat merged 2 commits intoProject-OSRM:masterfrom
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Fixes Project-OSRM#5788 Table queries where source and destination are phantom nodes on the same one-way segment can fail to find valid routes. This is due to a bug in the MLD table generation for the special case where the query can be simplified to a one-to-many search. If the destination is before the source on the one-way segment, it will fail to find a route. We fix this case by not marking the node as visited at the start, so that valid paths to this node can be found later in the search. We also remove redundant initialization for the source node as the same actions are performed by a search step.
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- Changes from 5.22.0
- Build:
- FIXED: pessimistic calls to std::move [Project-OSRM#5560](Project-OSRM#5561)
- Features:
- ADDED: new API parameter - `snapping=any|default` to allow snapping to previously unsnappable edges [Project-OSRM#5361](Project-OSRM#5361)
- ADDED: keepalive support to the osrm-routed HTTP server [Project-OSRM#5518](Project-OSRM#5518)
- ADDED: flatbuffers output format support [Project-OSRM#5513](Project-OSRM#5513)
- ADDED: Global 'skip_waypoints' option [Project-OSRM#5556](Project-OSRM#5556)
- FIXED: Install the libosrm_guidance library correctly [Project-OSRM#5604](Project-OSRM#5604)
- FIXED: Http Handler can now deal witch optional whitespace between header-key and -value [Project-OSRM#5606](Project-OSRM#5606)
- Routing:
- CHANGED: allow routing past `barrier=arch` [Project-OSRM#5352](Project-OSRM#5352)
- CHANGED: default car weight was reduced to 2000 kg. [Project-OSRM#5371](Project-OSRM#5371)
- CHANGED: default car height was reduced to 2 meters. [Project-OSRM#5389](Project-OSRM#5389)
- FIXED: treat `bicycle=use_sidepath` as no access on the tagged way. [Project-OSRM#5622](Project-OSRM#5622)
- FIXED: fix table result when source and destination on same one-way segment. [Project-OSRM#5828](Project-OSRM#5828)
- FIXED: fix occasional segfault when swapping data with osrm-datastore and using `exclude=` [Project-OSRM#5844](Project-OSRM#5844)
- FIXED: fix crash in MLD alternative search if source or target are invalid [Project-OSRM#5851](Project-OSRM#5851)
- Misc:
- CHANGED: Reduce memory usage for raster source handling. [Project-OSRM#5572](Project-OSRM#5572)
- CHANGED: Add cmake option `ENABLE_DEBUG_LOGGING` to control whether output debug logging. [Project-OSRM#3427](Project-OSRM#3427)
- CHANGED: updated extent of Hong Kong as left hand drive country. [Project-OSRM#5535](Project-OSRM#5535)
- FIXED: corrected error message when failing to snap input coordinates [Project-OSRM#5846](Project-OSRM#5846)
- Infrastructure
- REMOVED: STXXL support removed as STXXL became abandonware. [Project-OSRM#5760](Project-OSRM#5760)
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Issue
Fixes #5788
Table queries where source and destination are phantom nodes on the same one-way segment can fail to find valid routes.
This is due to a bug in the MLD table generation for the special case where the query can be simplified to a
one-to-many search. If the destination is before the source on the one-way segment, it will fail to find a route.
We fix this case by not marking the node as visited at the start, so that valid paths to this node can be found later in the search.
We also remove redundant initialization for the source node as the same actions are performed by a search step.
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