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More specifically:
syn
0.10 -> 0.13 which required a significant amount of changes;quote
0.3 -> 0.5 -- nearly no changes at all;compiletest_rs
0.2 -> 0.3 so that compile-fail tests could run on the latest nightly;itertools
has been removed because it wasn't used even before the update (I guess it was missed during refactoring before).The
derive-copy-clone
compile-fail test should fail on Rust 1.17+ because it compiles successfully due to rust-lang/rust#39572. I'll remove the test after this PR gets merged.