fix(react): Don't rename a navigation span with another location's route - #24347
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fix(react): Don't rename a navigation span with another location's route#24347logaretm wants to merge 2 commits into
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React Router resolves the routes for a location around the time the SDK starts that navigation's span, in either order, so a late resolution can hold the previous navigation's span while carrying the next location's path. Renaming it there shipped a navigation span under a route that was never visited on it. Each navigation span now records the pathname it was started for, and a rename is refused when the location being resolved does not match it. Keying this on the span rather than on whichever navigation is currently tracked matters, since by the time a slow lazy handler resolves, the tracker has usually moved on to the next span.
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A navigation span could be renamed with a route belonging to a different navigation, shipping a transaction under a route that was never visited on it.
Each navigation span now records the pathname it was started for, and a rename is refused when the location being resolved doesn't match.
Surfaced by the Chromium 153 upgrade in #24273, which resolves routes early enough to hit this on an ordinary back navigation.