rustfmt: cargo fmt --all completely stops formatting when failing on a single file

meta: rustc 1.30.0-nightly (2d4e34ca8 2018-09-09)

cargo fmt --version: rustfmt 0.99.4-nightly (1c40881 2018-08-27) rustfmt --version: rustfmt 0.99.4-nightly (1c40881 2018-08-27)

example crate: clippy

cd clippy_lints
cargo fmt --all

changed files:

    modified:   src/assign_ops.rs
    modified:   src/attrs.rs

cd clippy_lints
fd \.rs  -x rustfmt

changed files:

    modified:   src/assign_ops.rs
    modified:   src/attrs.rs
    modified:   src/blacklisted_name.rs
    modified:   src/block_in_if_condition.rs
    modified:   src/booleans.rs
    modified:   src/bytecount.rs
    modified:   src/const_static_lifetime.rs
    modified:   src/consts.rs
    modified:   src/cyclomatic_complexity.rs
    modified:   src/default_trait_access.rs
    modified:   src/deprecated_lints.rs
    modified:   src/doc.rs
    modified:   src/double_comparison.rs
    modified:   src/double_parens.rs
    modified:   src/drop_forget_ref.rs
    modified:   src/duration_subsec.rs
    modified:   src/else_if_without_else.rs
    modified:   src/empty_enum.rs
    modified:   src/entry.rs
    modified:   src/enum_clike.rs
    modified:   src/enum_glob_use.rs
    modified:   src/enum_variants.rs
    modified:   src/eq_op.rs
    modified:   src/erasing_op.rs
    modified:   src/escape.rs
    modified:   src/eta_reduction.rs
    modified:   src/eval_order_dependence.rs
    modified:   src/excessive_precision.rs
    modified:   src/explicit_write.rs
    modified:   src/fallible_impl_from.rs
    modified:   src/format.rs
    modified:   src/formatting.rs
    modified:   src/functions.rs
    modified:   src/identity_conversion.rs
    modified:   src/identity_op.rs
    modified:   src/if_let_redundant_pattern_matching.rs
    modified:   src/if_not_else.rs
    modified:   src/indexing_slicing.rs
    modified:   src/infallible_destructuring_match.rs
    modified:   src/infinite_iter.rs
    modified:   src/inherent_impl.rs
    modified:   src/inline_fn_without_body.rs
    modified:   src/int_plus_one.rs
    modified:   src/invalid_ref.rs
    modified:   src/items_after_statements.rs
    modified:   src/large_enum_variant.rs
    modified:   src/len_zero.rs
    modified:   src/let_if_seq.rs
    modified:   src/lifetimes.rs
    modified:   src/literal_representation.rs
    modified:   src/loops.rs
    modified:   src/map_clone.rs
    modified:   src/map_unit_fn.rs
    modified:   src/matches.rs
    modified:   src/misc.rs
    modified:   src/misc_early.rs
    modified:   src/missing_doc.rs
    modified:   src/missing_inline.rs
    modified:   src/multiple_crate_versions.rs
    modified:   src/mut_mut.rs
    modified:   src/mut_reference.rs
    modified:   src/mutex_atomic.rs
    modified:   src/needless_bool.rs
    modified:   src/needless_borrow.rs
    modified:   src/needless_borrowed_ref.rs
    modified:   src/needless_pass_by_value.rs
    modified:   src/needless_update.rs
    modified:   src/neg_cmp_op_on_partial_ord.rs
    modified:   src/neg_multiply.rs
    modified:   src/new_without_default.rs
    modified:   src/no_effect.rs
    modified:   src/non_copy_const.rs
    modified:   src/non_expressive_names.rs
    modified:   src/ok_if_let.rs
    modified:   src/open_options.rs
    modified:   src/overflow_check_conditional.rs
    modified:   src/panic_unimplemented.rs
    modified:   src/partialeq_ne_impl.rs
    modified:   src/precedence.rs
    modified:   src/ptr.rs
    modified:   src/ptr_offset_with_cast.rs
    modified:   src/question_mark.rs
    modified:   src/ranges.rs
    modified:   src/redundant_field_names.rs
    modified:   src/reference.rs
    modified:   src/regex.rs
    modified:   src/replace_consts.rs
    modified:   src/returns.rs
    modified:   src/serde_api.rs
    modified:   src/shadow.rs
    modified:   src/strings.rs
    modified:   src/suspicious_trait_impl.rs
    modified:   src/swap.rs
    modified:   src/temporary_assignment.rs
    modified:   src/transmute.rs
    modified:   src/trivially_copy_pass_by_ref.rs
    modified:   src/types.rs
    modified:   src/unicode.rs
    modified:   src/unsafe_removed_from_name.rs
    modified:   src/unused_io_amount.rs
    modified:   src/unused_label.rs
    modified:   src/unwrap.rs
    modified:   src/use_self.rs
    modified:   src/utils/author.rs
    modified:   src/utils/camel_case.rs
    modified:   src/utils/conf.rs
    modified:   src/utils/constants.rs
    modified:   src/utils/higher.rs
    modified:   src/utils/hir_utils.rs
    modified:   src/utils/internal_lints.rs
    modified:   src/utils/ptr.rs
    modified:   src/utils/sugg.rs
    modified:   src/vec.rs
    modified:   src/zero_div_zero.rs

What is going on here?