Fix opening a tab crashing MacVim #1334
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This seems to be a really old bug but new interactions with macOS (probably due to macOS 13 Ventura) caused it to surface and crash. Previously it was assuming a call to removeTrackingRect must always come only after addTrackingRect was called, which was not a good assumption to make. As a result, we could call this and end up triggering other code in macOS when passing in a 0 tracking tag. Fix macvim-dev#1333
ychin
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Feb 7, 2023
Similar to macvim-dev#1334. The old PSMTabBarControl code has a lot of dubious straggling states regarding the tracking tags. Seems like previous macOS versions tolerated that but in the newer macOS versions, the tags seem to be reused for other purposes and so when you double-remove the tags, you get into trouble. Related to macvim-dev#1333
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This seems to be a really old bug but new interactions with macOS (probably due to macOS 13 Ventura) caused it to surface and crash. Previously it was assuming a call to removeTrackingRect must always come only after addTrackingRect was called, which was not a good assumption to make. As a result, we could call this and end up triggering other code in macOS when passing in a 0 tracking tag.
Fix #1333