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Fix crash in MLD alternative search if source or target are invalid (#5851)

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In situations where there is not a valid source or target phantom
node (e.g. when snapping to an edge with a zero weight), a
heap assertion will fail in the MLD alternative search code.

We fix this by checking for empty heaps before proceeding with
the search.
This commit is contained in:
Michael Bell
2020-10-08 23:27:02 +01:00
committed by GitHub
parent e033e0b553
commit f87a324633
3 changed files with 30 additions and 0 deletions
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features/testbot/zero-speed-updates.feature
+25
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@@ -93,6 +93,31 @@ Feature: Check zero speed updates
| 1 | 2 | NoRoute |
Scenario: Routing with alternatives on restricted way
Given the node map
"""
a-1-b-2-c
"""
And the ways
| nodes | oneway |
| abc | no |
And the contract extra arguments "--segment-speed-file {speeds_file}"
And the customize extra arguments "--segment-speed-file {speeds_file}"
And the speed file
"""
1,2,0
2,1,0
"""
And the query options
| alternatives | true |
When I route I should get
| from | to | code | alternative |
| 1 | 2 | NoRoute | |
Scenario: Routing on restricted oneway
Given the node map
"""