Allocator.h:239:7: runtime error: null pointer returned from function declared to never return null

[ahoppen]

To reproduce run

UBSAN_OPTIONS=halt_on_error=true ~/swift-latest/usr/bin/swift test --sanitize=undefined --filter testObjectiveCTestsAfterInMemoryEdit

Output

Test Case '-[SourceKitLSPTests.DocumentTestDiscoveryTests testObjectiveCTestsAfterInMemoryEdit]' started.
/Users/alex/src/sourcekit-lsp/.command-line-build/checkouts/indexstore-db/lib/LLVMSupport/include/llvm/Support/Allocator.h:239:7: runtime error: null pointer returned from function declared to never return null
/Users/alex/src/sourcekit-lsp/.command-line-build/checkouts/indexstore-db/lib/LLVMSupport/include/llvm/Support/Allocator.h:213:3: note: returns_nonnull attribute specified here
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /Users/alex/src/sourcekit-lsp/.command-line-build/checkouts/indexstore-db/lib/LLVMSupport/include/llvm/Support/Allocator.h:239:7 in 
error: Exited with unexpected signal code 6

[ahoppen]

Synced to Apple’s issue tracker as rdar://129444472