Adapt to new error location type (#358) #57

Job	Run time
Coq integration tests (8.4, 3.6)	39s
Coq integration tests (8.5, 3.6)	52s
Coq integration tests (8.6, 3.6)	55s
Coq integration tests (8.7, 3.6)	49s
Coq integration tests (8.8, 3.6)	50s
Coq integration tests (8.9, 3.6)	56s
Coq integration tests (8.10, 3.6)	57s
Coq integration tests (8.11, 3.6)	58s
Coq integration tests (8.12, 3.6)	57s
Coq integration tests (8.13, 3.6)	56s
Coq integration tests (8.14, 3.6)	58s
Coq integration tests (8.15, 3.6)	54s
Coq integration tests (8.16, 3.6)	57s
Coq integration tests (8.17, 3.6)	57s
Coq integration tests (8.18, 3.6)	59s
Coq integration tests (8.19, 3.6)	1m 2s
Coq integration tests (master, 3.6)	4m 1s
	18m 37s

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