Shoaib Meenai 0cf624cad7 [TimeProfiler] Reset variable to nullptr ...

Otherwise we'll hit a spurious assert failure when we reset and then
reinitialize TimeProfiler on the same thread, as can happen when e.g.
using LLD as a library and running it multiple times in the same
process.

Makes `lld/test/MachO/time-trace.s` pass with `LLD_IN_TEST=2`, which
runs the linker twice in the same process and exposed the issue.

Reviewed By: MaskRay, mehdi_amini

Differential Revision: https://reviews.llvm.org/D112880

2021-10-31 16:14:30 -07:00

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