Build

Fill in empty spans for a list with the starting location instead #1442

Job	Run time
Wasm32 build	45s
Wasm32 build	45s
Wasm32 build	45s
redox build	3m 38s
redox build	3m 38s
redox build	3m 38s
Test Suite	19m 2s
Test Suite	15m 0s
Test Suite	14m 31s
Test Suite (sync) (ubuntu-latest, x86_64-unknown-linux-gnu)	9m 16s
Test Suite (sync) (ubuntu-latest, x86_64-unknown-linux-gnu)	9m 16s
Test Suite (sync) (ubuntu-latest, x86_64-unknown-linux-gnu)	9m 16s
Test Suite (sync) (macos-latest, aarch64-apple-darwin)	8m 15s
Test Suite (sync) (macos-latest, aarch64-apple-darwin)	8m 15s
Test Suite (sync) (macos-latest, aarch64-apple-darwin)	8m 15s
Test Suite (sync) (windows-latest, x86_64-pc-windows-msvc)	18m 30s
Test Suite (sync) (windows-latest, x86_64-pc-windows-msvc)	18m 30s
Test Suite (sync) (windows-latest, x86_64-pc-windows-msvc)	18m 30s
Rustfmt	0s
Rustfmt	0s
Rustfmt	0s
	2h 49m 45s

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