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40b0764101
A crash was happening when both ObjC Category Merging and Relative method lists were enabled. ObjC Category Merging creates new data sections and adds them by calling `addInputSection`. `addInputSection` uses the symbols within the added section to determine which container to actually add the section to. The issue is that ObjC Category merging is calling `addInputSection` before actually adding the relevant symbols the the added section. This causes `addInputSection` to add the `InputSection` to the wrong container, eventually resulting in a crash. To fix this, we ensure that ObjC Category Merging calls `addInputSection` only after the symbols have been added to the `InputSection`. (cherry picked from commit 0df91893efc752a76c7bbe6b063d66c8a2fa0d55)