Handle bad file names. #185

Job	Run time
Test (stable)	26s
Test (1.64.0)	54s
Test (1.60.0)	1m 4s
Test (1.58.1)	1m 9s
Test (beta)	20s
Test (nightly)	18s
Rustfmt	20s
Test example (actix, stable)	1m 39s
Test example (actix, nightly)	1m 22s
Test example (axum, stable)	59s
Test example (axum, nightly)	1m 6s
Test example (gotham, stable)	1m 24s
Test example (gotham, nightly)	1m 33s
Test example (iron, stable)	39s
Test example (iron, nightly)	48s
Test example (nickel, stable)	1m 0s
Test example (nickel, nightly)	45s
Test example (simple, stable)	22s
Test example (simple, nightly)	23s
Test example (static-sass, stable)	42s
Test example (static-sass, nightly)	28s
Test example (statics, stable)	22s
Test example (statics, nightly)	20s
Test example (tide, stable)	1m 14s
Test example (tide, nightly)	1m 18s
Test example (warp03, stable)	1m 16s
Test example (warp03, nightly)	1m 6s
	23m 17s

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