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rust/tests/ui
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bors 798fb83f7d Auto merge of #131797 - matthiaskrgr:rollup-lzpze2k, r=matthiaskrgr 
Rollup of 9 pull requests

Successful merges:

 - #130989 (Don't check unsize goal in MIR validation when opaques remain)
 - #131657 (Rustfmt `for<'a> async` correctly)
 - #131691 (Delay ambiguous intra-doc link resolution after `Cache` has been populated)
 - #131730 (Refactor some `core::fmt` macros)
 - #131751 (Rename `can_coerce` to `may_coerce`, and then structurally resolve correctly in the probe)
 - #131753 (Unify `secondary_span` and `swap_secondary_and_primary` args in `note_type_err`)
 - #131776 (Emscripten: Xfail backtrace ui tests)
 - #131777 (Fix trivially_copy_pass_by_ref in stable_mir)
 - #131778 (Fix needless_lifetimes in stable_mir)

r? `@ghost`
`@rustbot` modify labels: rollup
2024-10-16 20:50:53 +00:00
..
abi
Rollup merge of #131521 - jdonszelmann:rc, r=joboet
2024-10-15 12:33:36 -04:00
alloc-error
…
allocator
UI tests: Rename "object safe" to "dyn compatible"
2024-10-10 01:13:29 +02:00
annotate-snippet
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anon-params
…
argfile
…
argument-suggestions
…
array-slice-vec
Update tests for hidden references to mutable static
2024-09-13 14:10:56 +03:00
asm
Fix clobber_abi and disallow SVE-related registers in Arm64EC inline assembly
2024-10-14 05:30:45 +09:00
associated-consts
…
associated-inherent-types
…
associated-item
…
associated-type-bounds
Don't assume traits used as type are trait objs
2024-10-11 17:36:04 +02:00
associated-types
stabilize -Znext-solver=coherence
2024-10-15 13:11:00 +02:00
async-await
Rollup merge of #130635 - eholk:pin-reborrow-sugar, r=compiler-errors
2024-10-15 05:12:34 +02:00
attributes
…
auto-traits
stabilize -Znext-solver=coherence
2024-10-15 13:11:00 +02:00
autodiff
Add pretty, ui, and feature-gate tests for the enzyme/autodiff frontend
2024-10-11 20:38:43 +02:00
autoref-autoderef
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auxiliary
…
backtrace
Emscripten: Xfail backtrace ui tests
2024-10-16 12:22:14 +02:00
bench
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
binding
…
binop
Don't call const normalize in error reporting
2024-09-22 13:55:06 -04:00
blind
…
block-result
…
borrowck
…
box
Mention when type parameter could be Clone
2024-04-24 22:21:15 +00:00
btreemap
…
builtin-superkinds
…
c-variadic
…
cast
Use wide pointers consistenly across the compiler
2024-10-04 14:06:48 +02:00
cfg
Handle gracefully true/false in cfg(target(..)) compact
2024-10-16 09:41:49 +02:00
check-cfg
rustc_target: Add sme-b16b16 as an explicit aarch64 target feature
2024-10-10 10:24:57 +00:00
closure_context
…
closure-expected-type
Make nll higher ranked equate use bidirectional subtyping in invariant context
2024-02-29 15:27:59 -03:00
closures
Document things a bit more carefully, also account for coercion in check_expr_has_type_or_error
2024-10-05 18:36:47 -04:00
cmse-nonsecure
improve error messages for C-cmse-nonsecure-entry functions
2024-10-14 22:32:32 +02:00
codegen
…
codemap_tests
…
coercion
…
coherence
remove unnecessary revisions
2024-10-15 13:26:59 +02:00
coinduction
…
command
Avoid dynamic linking to libstd in command-current-dir test
2024-10-04 15:34:31 +02:00
compare-method
…
compiletest-self-test
…
conditional-compilation
Return earlier in some cases in collect_token.
2024-08-23 14:40:08 +10:00
confuse-field-and-method
…
const_prop
…
const-generics
stabilize -Znext-solver=coherence
2024-10-15 13:11:00 +02:00
const-ptr
…
consts
Rollup merge of #130568 - eduardosm:const-float-methods, r=RalfJung,tgross35
2024-10-15 12:33:35 -04:00
coroutine
…
coverage-attr
Rename directive needs-profiler-support to needs-profiler-runtime
2024-10-09 20:58:27 +11:00
crate-loading
Make not finding core a fatal error
2024-03-06 18:19:13 -05:00
cross
Provide structured suggestion for #![feature(foo)]
2024-03-18 16:08:58 +00:00
cross-crate
…
custom_test_frameworks
…
cycle-trait
…
debuginfo
TL note: current means target
2024-09-20 10:02:14 -07:00
definition-reachable
…
delegation
Bless ui tests.
2024-10-04 23:38:41 +00:00
dep-graph
…
deployment-target
Avoid a couple of unnecessary EarlyDiagCtxt uses
2024-06-22 17:06:47 +00:00
deprecation
…
deref-patterns
Move some tests
2024-04-21 15:43:43 -03:00
derived-errors
Show number in error message even for one error
2023-11-24 19:15:52 +01:00
derives
…
deriving
Check that #[pointee] is applied only to generic arguments
2024-10-06 23:56:27 +02:00
dest-prop
…
destructuring-assignment
…
diagnostic_namespace
Remove 'apostrophes' from rustc_parse_format
2024-10-14 23:22:51 +02:00
diagnostic-flags
…
diagnostic-width
Suggest using --verbose when writing type to a file
2024-02-20 23:48:59 +01:00
did_you_mean
…
directory_ownership
…
disallowed-deconstructing
…
dollar-crate
…
drop
…
drop-bounds
…
dropck
replace "cast" with "coercion" where applicable
2024-09-24 22:20:46 +02:00
dst
…
duplicate
…
dyn-compatibility
Don't assume traits used as type are trait objs
2024-10-11 17:36:04 +02:00
dyn-drop
…
dyn-keyword
Don't assume traits used as type are trait objs
2024-10-11 17:36:04 +02:00
dyn-star
…
dynamically-sized-types
…
editions
Don't assume traits used as type are trait objs
2024-10-11 17:36:04 +02:00
empty
…
entry-point
…
enum
More accurate suggestions when writing wrong style of enum variant literal
2024-07-18 18:20:35 +00:00
enum-discriminant
…
env-macro
…
error-codes
stabilize -Znext-solver=coherence
2024-10-15 13:11:00 +02:00
error-emitter
…
errors
…
explicit
…
explicit-tail-calls
…
expr
…
extern
Note what qualifier
2024-10-11 11:30:08 -04:00
extern-flag
…
feature-gates
stabilize -Znext-solver=coherence
2024-10-15 13:11:00 +02:00
ffi-attrs
…
float
move f16/f128 const fn under f16/f128 feature gate
2024-10-05 10:13:18 +02:00
fmt
Remove 'apostrophes' from rustc_parse_format
2024-10-14 23:22:51 +02:00
fn
Enforce supertrait outlives obligations hold when confirming impl
2024-08-05 09:55:14 -04:00
fn-main
…
for
Be better at reporting alias errors
2024-10-15 20:42:17 -04:00
for-loop-while
…
foreign
…
fuel
…
fully-qualified-type
…
function-pointer
…
functional-struct-update
…
functions-closures
…
generic-associated-types
Be better at reporting alias errors
2024-10-15 20:42:17 -04:00
generic-const-items
fix(hir_analysis/wfcheck): don't leak {type error}
2024-09-29 23:40:43 -05:00
generics
elided_named_lifetimes: bless & add tests
2024-08-31 15:35:42 +03:00
half-open-range-patterns
On function and method calls in patterns, link to the book
2024-10-06 01:44:59 +00:00
hashmap
…
hello_world
…
higher-ranked
Bless tests
2024-10-15 20:42:17 -04:00
hygiene
…
illegal-sized-bound
…
impl-header-lifetime-elision
…
impl-trait
Auto merge of #131797 - matthiaskrgr:rollup-lzpze2k, r=matthiaskrgr
2024-10-16 20:50:53 +00:00
implied-bounds
…
imports
…
include-macros
diagnostics: fix crash on completely empty included file
2024-03-29 18:22:44 -07:00
incoherent-inherent-impls
…
indexing
…
inference
…
infinite
…
inherent-impls-overlap-check
…
inline-const
…
instrument-coverage
coverage. Adapt to mcdc mapping formats introduced by llvm 19
2024-10-08 11:15:24 +08:00
instrument-xray
…
interior-mutability
rename 'try' intrinsic to 'catch_unwind'
2024-02-26 11:10:18 +01:00
internal
…
internal-lints
Use the rustc_private libc less in tests
2024-04-15 08:54:11 -04:00
intrinsics
Fix most ui tests on emscripten target
2024-10-15 14:25:55 +02:00
invalid
…
invalid-compile-flags
…
invalid-module-declaration
…
invalid-self-argument
…
io-checks
…
issues
Auto merge of #131747 - compiler-errors:rollup-0fnymws, r=compiler-errors
2024-10-15 19:55:10 +00:00
iterators
…
json
…
keyword
…
kindck
Rename feature object_safe_for_dispatch to dyn_compatible_for_dispatch
2024-10-10 00:57:59 +02:00
label
…
lang-items
…
late-bound-lifetimes
…
layout
Dont ICE when encountering post-mono layout cycle error
2024-10-08 16:46:16 -04:00
lazy-type-alias
…
lazy-type-alias-impl-trait
…
let-else
…
lexer
…
lifetimes
…
limits
…
linkage-attr
…
lint
Ignore lint-non-snake-case-crate#proc_macro_ on targets without unwind
2024-10-16 10:55:49 -04:00
liveness
…
loops
Fix ... in multline code-skips in suggestions
2024-06-20 04:25:17 +00:00
lowering
Change wording
2024-04-29 14:53:38 +02:00
lto
…
lub-glb
…
macro_backtrace
…
macros
Remove 'apostrophes' from rustc_parse_format
2024-10-14 23:22:51 +02:00
malformed
Be more accurate about calculating display_col from a BytePos
2024-07-18 20:08:38 +00:00
manual
…
marker_trait_attr
…
match
Match ergonomics 2024: test type inference
2024-07-05 11:17:49 -04:00
meta
Remap path refix in the panic message
2024-10-12 09:41:42 +08:00
methods
…
mir
Fix mismatched quotation mark
2024-10-17 00:16:19 +08:00
mir-dataflow
…
mismatched_types
Use wide pointers consistenly across the compiler
2024-10-04 14:06:48 +02:00
missing
…
missing_non_modrs_mod
…
missing-trait-bounds
…
modules
…
modules_and_files_visibility
…
moves
…
mut
…
namespace
…
native-library-link-flags
…
never_type
Be far more strict about what we consider to be a read of never
2024-10-05 19:10:47 -04:00
nll
…
no_std
…
non_modrs_mods
…
non_modrs_mods_and_inline_mods
…
not-panic
…
numbers-arithmetic
Don't call const normalize in error reporting
2024-09-22 13:55:06 -04:00
numeric
…
object-lifetime
…
obsolete-in-place
…
offset-of
…
on-unimplemented
…
operator-recovery
…
or-patterns
…
overloaded
…
packed
…
panic-handler
fix typo in 'lang item with track_caller' message
2024-10-05 17:12:46 +02:00
panic-runtime
…
panics
Bless tests
2024-08-02 11:34:54 +00:00
parallel-rustc
…
parser
Rollup merge of #131550 - compiler-errors:extern-diags, r=spastorino
2024-10-14 17:06:38 +02:00
patchable-function-entry
…
pattern
Rollup merge of #131381 - Nadrieril:min-match-ergonomics, r=pnkfelix
2024-10-16 19:18:30 +02:00
pin-macro
…
polymorphization
…
precondition-checks
Add a test for zero-sized writes through null
2024-10-09 19:34:27 -04:00
print_type_sizes
…
privacy
Bless ui tests.
2024-10-04 23:38:41 +00:00
proc-macro
Remove deprecation note in the non_local_definitions warning
2024-10-11 21:21:32 +02:00
process
Fix most ui tests on emscripten target
2024-10-15 14:25:55 +02:00
process-termination
…
ptr_ops
…
pub
Bless test fallout
2024-08-03 07:57:31 -04:00
qualified
…
query-system
…
range
…
raw-ref-op
Be far more strict about what we consider to be a read of never
2024-10-05 19:10:47 -04:00
reachable
Be far more strict about what we consider to be a read of never
2024-10-05 19:10:47 -04:00
recursion
…
recursion_limit
…
regions
…
repeat-expr
Account for let foo = expr; to suggest const foo: Ty = expr;
2024-07-11 20:39:24 +00:00
repr
…
reserved
…
resolve
Don't assume traits used as type are trait objs
2024-10-11 17:36:04 +02:00
return
…
rfcs
Rollup merge of #131475 - fmease:compiler-mv-obj-safe-dyn-compat-2, r=jieyouxu
2024-10-10 22:00:50 +02:00
rmeta
…
runtime
std: fix stdout-before-main
2024-10-12 13:01:36 +02:00
rust-2018
…
rust-2021
Don't assume traits used as type are trait objs
2024-10-11 17:36:04 +02:00
rust-2024
Remove unadorned
2024-10-11 11:30:08 -04:00
rustc-env
…
rustdoc
…
sanitizer
UI tests: Rename "object safe" to "dyn compatible"
2024-10-10 01:13:29 +02:00
self
Rollup merge of #131475 - fmease:compiler-mv-obj-safe-dyn-compat-2, r=jieyouxu
2024-10-10 22:00:50 +02:00
sepcomp
…
shadowed
…
shell-argfiles
…
simd
…
single-use-lifetime
…
sized
On function and method calls in patterns, link to the book
2024-10-06 01:44:59 +00:00
span
…
specialization
rebase and update fixed crashes
2024-10-15 13:11:00 +02:00
stability-attribute
…
stable-mir-print
…
stack-protector
…
static
…
statics
…
stats
…
std
Fix most ui tests on emscripten target
2024-10-15 14:25:55 +02:00
stdlib-unit-tests
Move various stdlib tests to library/std/tests
2024-04-28 16:10:12 -04:00
str
…
structs
…
structs-enums
Fix most ui tests on emscripten target
2024-10-15 14:25:55 +02:00
suggestions
Don't assume traits used as type are trait objs
2024-10-11 17:36:04 +02:00
svh
…
symbol-mangling-version
…
symbol-names
…
sync
…
target-feature
…
test-attrs
…
thir-print
…
thread-local
…
threads-sendsync
…
tool-attributes
Fix diagnostic and add a test for it
2024-07-10 18:56:06 -04:00
track-diagnostics
…
trait-bounds
…
traits
Auto merge of #131797 - matthiaskrgr:rollup-lzpze2k, r=matthiaskrgr
2024-10-16 20:50:53 +00:00
transmutability
remove unnecessary revisions
2024-10-15 13:26:59 +02:00
transmute
…
treat-err-as-bug
…
trivial-bounds
…
try-block
…
try-trait
Remove feature(control_flow_enum) in tests
2024-09-25 19:00:19 -07:00
tuple
…
type
…
type-alias
…
type-alias-enum-variants
…
type-alias-impl-trait
Don't structurally resolve in may_coerce
2024-10-15 20:44:39 -04:00
type-inference
…
typeck
Be better at reporting alias errors
2024-10-15 20:42:17 -04:00
typeof
…
ufcs
Don't call const normalize in error reporting
2024-09-22 13:55:06 -04:00
unboxed-closures
…
underscore-imports
…
underscore-lifetime
…
uniform-paths
…
uninhabited
…
union
Remove unnamed field feature
2024-10-01 13:55:46 -04:00
unknown-unstable-lints
…
unop
…
unpretty
…
unresolved
…
unsafe
…
unsized
…
unsized-locals
UI tests: Rename "object safe" to "dyn compatible"
2024-10-10 01:13:29 +02:00
unused-crate-deps
…
unwind-abis
…
use
Suppress import errors for traits that couldve applied in method lookup on error
2024-10-14 14:40:11 -04:00
variance
Don't report bivariance error when nesting a struct with field errors into another struct
2024-10-15 14:58:54 -04:00
variants
…
version
…
warnings
…
wasm
…
wf
UI tests: Rename "object safe" to "dyn compatible"
2024-10-10 01:13:29 +02:00
where-clauses
…
while
…
windows-subsystem
…
zero-sized
…
.gitattributes
…
alias-uninit-value.rs
…
allow-non-lint-warnings.rs
…
anonymous-higher-ranked-lifetime.rs
…
anonymous-higher-ranked-lifetime.stderr
…
artificial-block.rs
…
as-precedence.rs
…
assign-assign.rs
…
assign-imm-local-twice.rs
…
assign-imm-local-twice.stderr
…
assoc-lang-items.rs
…
assoc-lang-items.stderr
…
assoc-oddities-3.rs
…
associated-path-shl.rs
…
associated-path-shl.stderr
…
atomic-from-mut-not-available.rs
…
atomic-from-mut-not-available.stderr
…
attempted-access-non-fatal.rs
…
attempted-access-non-fatal.stderr
…
attr-bad-crate-attr.rs
…
attr-bad-crate-attr.stderr
…
attr-shebang.rs
…
attr-start.rs
…
attr-usage-inline.rs
…
attr-usage-inline.stderr
…
attrs-resolution-errors.rs
Move /src/test to /tests
2023-01-11 09:32:08 +00:00
attrs-resolution-errors.stderr
…
attrs-resolution.rs
…
augmented-assignments-feature-gate-cross.rs
…
augmented-assignments-rpass.rs
…
augmented-assignments.rs
…
augmented-assignments.stderr
…
auto-instantiate.rs
…
auto-ref-slice-plus-ref.rs
…
auto-ref-slice-plus-ref.stderr
…
autoderef-full-lval.rs
…
autoderef-full-lval.stderr
…
bare-fn-implements-fn-mut.rs
…
bare-static-string.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
big-literals.rs
…
bind-by-move.rs
…
bitwise.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
bogus-tag.rs
…
bogus-tag.stderr
…
borrow-by-val-method-receiver.rs
…
bounds-lifetime.rs
…
bounds-lifetime.stderr
…
break-diverging-value.rs
…
break-diverging-value.stderr
…
builtin-clone-unwind.rs
…
can-copy-pod.rs
…
cancel-clean-via-immediate-rvalue-ref.rs
…
cannot-mutate-captured-non-mut-var.rs
…
cannot-mutate-captured-non-mut-var.stderr
…
capture1.rs
…
capture1.stderr
…
catch-unwind-bang.rs
…
cenum_impl_drop_cast.rs
…
cenum_impl_drop_cast.stderr
…
cfguard-run.rs
…
char.rs
…
class-cast-to-trait.rs
…
class-cast-to-trait.stderr
…
class-method-missing.rs
…
class-method-missing.stderr
Show number in error message even for one error
2023-11-24 19:15:52 +01:00
cleanup-rvalue-for-scope.rs
…
cleanup-rvalue-scopes-cf.rs
…
cleanup-rvalue-scopes-cf.stderr
…
cleanup-rvalue-scopes.rs
…
cleanup-rvalue-temp-during-incomplete-alloc.rs
…
cleanup-shortcircuit.rs
…
close-over-big-then-small-data.rs
…
command-line-diagnostics.rs
…
command-line-diagnostics.stderr
…
complex.rs
…
conservative_impl_trait.rs
…
conservative_impl_trait.stderr
…
constructor-lifetime-args.rs
…
constructor-lifetime-args.stderr
…
copy-a-resource.rs
…
copy-a-resource.stderr
…
crate-leading-sep.rs
…
crate-method-reexport-grrrrrrr.rs
…
crate-name-attr-used.rs
…
crate-name-mismatch.rs
…
crate-name-mismatch.stderr
…
custom_attribute.rs
Move /src/test to /tests
2023-01-11 09:32:08 +00:00
custom_attribute.stderr
…
custom-attribute-multisegment.rs
…
custom-attribute-multisegment.stderr
…
custom-test-frameworks-simple.rs
…
deduplicate-diagnostics.deduplicate.stderr
…
deduplicate-diagnostics.duplicate.stderr
…
deduplicate-diagnostics.rs
…
deep.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
default-method-parsing.rs
…
default-method-simple.rs
…
defaults-well-formedness.rs
…
deprecation-in-force-unstable.rs
…
deref-non-pointer.rs
…
deref-non-pointer.stderr
…
deref-rc.rs
…
deref.rs
…
derive-uninhabited-enum-38885.rs
…
derive-uninhabited-enum-38885.stderr
…
destructure-trait-ref.rs
…
destructure-trait-ref.stderr
…
diverging-fallback-method-chain.rs
…
diverging-fallback-option.rs
…
diverging-fn-tail-35849.rs
…
diverging-fn-tail-35849.stderr
…
double-ref.rs
…
double-type-import.rs
…
double-type-import.stderr
…
dupe-first-attr.rs
…
duplicate_entry_error.rs
…
duplicate_entry_error.stderr
…
duplicate-label-E0381-issue-129274.rs
…
duplicate-label-E0381-issue-129274.stderr
…
early-ret-binop-add.rs
…
elide-errors-on-mismatched-tuple.rs
…
elide-errors-on-mismatched-tuple.stderr
…
elided-test.rs
…
elided-test.stderr
…
else-if.rs
…
empty-allocation-non-null.rs
…
empty-allocation-rvalue-non-null.rs
…
empty-type-parameter-list.rs
…
empty-type-parameter-list.stderr
…
error-festival.rs
…
error-festival.stderr
Use wide pointers consistenly across the compiler
2024-10-04 14:06:48 +02:00
error-should-say-copy-not-pod.rs
…
error-should-say-copy-not-pod.stderr
…
exclusive-drop-and-copy.rs
…
exclusive-drop-and-copy.stderr
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explain.rs
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explain.stdout
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explicit-i-suffix.rs
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explore-issue-38412.rs
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explore-issue-38412.stderr
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ext-expand-inner-exprs.rs
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ext-nonexistent.rs
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ext-nonexistent.stderr
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fact.rs
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fail-simple.rs
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fail-simple.stderr
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filter-block-view-items.rs
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format-no-std.rs
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fun-indirect-call.rs
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future-incompatible-lint-group.rs
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future-incompatible-lint-group.stderr
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global-scope.rs
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hello.rs
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illegal-ufcs-drop.fixed
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illegal-ufcs-drop.rs
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illegal-ufcs-drop.stderr
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impl-inherent-non-conflict.rs
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impl-not-adjacent-to-type.rs
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impl-privacy-xc-1.rs
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impl-unused-rps-in-assoc-type.rs
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impl-unused-rps-in-assoc-type.stderr
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impl-unused-tps-inherent.rs
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impl-unused-tps.rs
stabilize -Znext-solver=coherence
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impl-unused-tps.stderr
stabilize -Znext-solver=coherence
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implicit-method-bind.rs
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inline-disallow-on-variant.rs
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inlined-main.rs
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inner-attrs-on-impl.rs
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inner-module.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
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inner-static-type-parameter.rs
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inner-static.rs
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integral-indexing.rs
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integral-indexing.stderr
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integral-variable-unification-error.rs
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invalid_crate_type_syntax.rs
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invalid_dispatch_from_dyn_impls.rs
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issue-11881.rs
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issue-76387-llvm-miscompile.rs
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item-name-overload.rs
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kinds-in-metadata.rs
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last-use-in-block.rs
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lazy-and-or.rs
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lexical-scopes.rs
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lexical-scoping.rs
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link-section.rs
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list.rs
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log-err-phi.rs
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log-poly.rs
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logging-only-prints-once.rs
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loud_ui.rs
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max-min-classes.rs
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maximal_mir_to_hir_coverage.rs
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maybe-bounds.rs
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method-output-diff-issue-127263.rs
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minus-string.rs
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missing_debug_impls.rs
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multibyte.rs
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multiline-comment.rs
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mut-function-arguments.rs
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mutual-recursion-group.rs
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myriad-closures.rs
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nested-block-comment.rs
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nested-class.rs
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new-impl-syntax.rs
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newlambdas.rs
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nul-characters.rs
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partialeq_help.rs
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pptypedef.rs
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primitive-binop-lhs-mut.rs
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query-visibility.rs
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README.md
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rustc-error.rs
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seq-args.rs
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stable-addr-of.rs
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write-fmt-errors.rs
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README.md

UI Tests

This folder contains rustc's UI tests.

Test Directives (Headers)

Typically, a UI test will have some test directives / headers which are special comments that tell compiletest how to build and intepret a test.

As part of an on-going effort to rewrite compiletest (see https://github.com/rust-lang/compiler-team/issues/536), a major change proposal to change legacy compiletest-style headers // <directive> to ui_test-style headers //@ <directive> was accepted (see https://github.com/rust-lang/compiler-team/issues/512.

An example directive is ignore-test. In legacy compiletest style, the header would be written as

// ignore-test

but in ui_test style, the header would be written as

//@ ignore-test

compiletest is changed to accept only //@ directives for UI tests (currently), and will reject and report an error if it encounters any comments // <content> that may be parsed as an legacy compiletest-style test header. To fix this, you should migrate to the ui_test-style header //@ <content>.