Dotty

Ensure pt span exists in implicitParams migration #35975

Job	Run time
test	1h 5m 54s
test_windows_fast	35m 32s
test_non_bootstrapped	0s
community_build_c	53m 36s
MiMa	11m 14s
test_sbt	16m 46s
community_build_b	1h 18m 4s
test_java8	0s
build-msi-package	0s
test_scala2_library_tasty	0s
test_windows_full	0s
community_build_a	48m 35s
build-sdk-package / build	9m 26s
test-msi-package	0s
build-chocolatey-package / build	18s
test-chocolatey-package	0s
publish_nightly	0s
publish_release	0s
nightly_documentation	0s
open_issue_on_failure	-1s
	5h 19m 24s

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