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rust/tests/coverage
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Zalathar 7ca4d1f6a1 coverage: Regression test for "function name is empty" bug 
The bug was triggered by a particular usage of the `?` try operator in a
proc-macro expansion.

Thanks to lqd for the minimization.

Co-authored-by: Rémy Rakic <remy.rakic+github@gmail.com>
2025-07-29 11:36:43 +10:00
..
attr
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
auxiliary
coverage: Regression test for "function name is empty" bug
2025-07-29 11:36:43 +10:00
branch
Remove let_chains feature
2025-06-30 07:49:20 -05:00
condition
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
mcdc
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
abort.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
abort.coverage
coverage: Restrict empty-span expansion to only cover { and }
2024-11-08 20:43:08 +11:00
abort.rs
Remove c_unwind from tests and fix tests
2024-06-19 13:54:55 +01:00
assert_not.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
assert_not.coverage
…
assert_not.rs
…
assert-ne.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
assert-ne.coverage
coverage: Tweak tests/coverage/assert-ne.rs
2025-04-01 13:07:33 +11:00
assert-ne.rs
coverage: Tweak tests/coverage/assert-ne.rs
2025-04-01 13:07:33 +11:00
assert.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
assert.coverage
coverage: Completely overhaul counter assignment, using node-flow graphs
2025-01-16 22:07:18 +11:00
assert.rs
…
async2.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
async2.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
async2.rs
Revert "Auto merge of #130766 - clarfonthey:stable-coverage-attribute, r=wesleywiser"
2024-12-23 12:30:37 +11:00
async_block.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
async_block.coverage
coverage: Instead of splitting, just discard any span that overlaps a hole
2025-04-01 13:13:20 +11:00
async_block.rs
Revert "Auto merge of #130766 - clarfonthey:stable-coverage-attribute, r=wesleywiser"
2024-12-23 12:30:37 +11:00
async_closure.cov-map
Revert "coverage: Enlarge empty spans during MIR instrumentation, not codegen"
2025-07-26 11:14:40 +10:00
async_closure.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
async_closure.rs
Stabilize async closures
2024-12-13 00:04:56 +00:00
async.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
async.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
async.rs
Revert "Auto merge of #130766 - clarfonthey:stable-coverage-attribute, r=wesleywiser"
2024-12-23 12:30:37 +11:00
await_ready.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
await_ready.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
await_ready.rs
Revert "Auto merge of #130766 - clarfonthey:stable-coverage-attribute, r=wesleywiser"
2024-12-23 12:30:37 +11:00
bad_counter_ids.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
bad_counter_ids.coverage
Revert "Auto merge of #130766 - clarfonthey:stable-coverage-attribute, r=wesleywiser"
2024-12-23 12:30:37 +11:00
bad_counter_ids.rs
Revert "Auto merge of #130766 - clarfonthey:stable-coverage-attribute, r=wesleywiser"
2024-12-23 12:30:37 +11:00
bench.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
bench.coverage
…
bench.rs
…
closure_bug.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
closure_bug.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
closure_bug.rs
…
closure_macro_async.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
closure_macro_async.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
closure_macro_async.rs
Revert "Auto merge of #130766 - clarfonthey:stable-coverage-attribute, r=wesleywiser"
2024-12-23 12:30:37 +11:00
closure_macro.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
closure_macro.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
closure_macro.rs
…
closure_unit_return.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
closure_unit_return.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
closure_unit_return.rs
Revert "Auto merge of #130766 - clarfonthey:stable-coverage-attribute, r=wesleywiser"
2024-12-23 12:30:37 +11:00
closure.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
closure.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
closure.rs
…
color.coverage
Simplify the directives for ignoring coverage-test modes
2024-10-08 22:51:53 +11:00
color.rs
Simplify the directives for ignoring coverage-test modes
2024-10-08 22:51:53 +11:00
conditions.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
conditions.coverage
coverage: Restrict empty-span expansion to only cover { and }
2024-11-08 20:43:08 +11:00
conditions.rs
…
continue.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
continue.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
continue.rs
…
coroutine.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
coroutine.coverage
Manually run x fmt on all source files in tests/coverage/
2024-05-29 14:34:17 +10:00
coroutine.rs
Manually run x fmt on all source files in tests/coverage/
2024-05-29 14:34:17 +10:00
coverage_attr_closure.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
coverage_attr_closure.coverage
Revert "Auto merge of #130766 - clarfonthey:stable-coverage-attribute, r=wesleywiser"
2024-12-23 12:30:37 +11:00
coverage_attr_closure.rs
Revert "Auto merge of #130766 - clarfonthey:stable-coverage-attribute, r=wesleywiser"
2024-12-23 12:30:37 +11:00
dead_code.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
dead_code.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
dead_code.rs
…
discard-all-issue-133606.coverage
coverage: Add a synthetic test for when all spans are discarded
2024-12-19 22:03:43 +11:00
discard-all-issue-133606.rs
coverage: Add a synthetic test for when all spans are discarded
2024-12-19 22:03:43 +11:00
drop_trait.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
drop_trait.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
drop_trait.rs
…
fn_sig_into_try.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
fn_sig_into_try.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
fn_sig_into_try.rs
Revert "Auto merge of #130766 - clarfonthey:stable-coverage-attribute, r=wesleywiser"
2024-12-23 12:30:37 +11:00
generic-unused-impl.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
generic-unused-impl.coverage
add comment to test
2025-01-09 13:55:50 +01:00
generic-unused-impl.rs
add comment to test
2025-01-09 13:55:50 +01:00
generics.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
generics.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
generics.rs
…
holes.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
holes.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
holes.rs
coverage: Add some more cases to tests/coverage/holes.rs
2025-02-19 13:56:20 +11:00
if_else.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
if_else.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
if_else.rs
…
if_not.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
if_not.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
if_not.rs
Revert "Auto merge of #130766 - clarfonthey:stable-coverage-attribute, r=wesleywiser"
2024-12-23 12:30:37 +11:00
if.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
if.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
if.rs
…
ignore_map.coverage
Simplify the directives for ignoring coverage-test modes
2024-10-08 22:51:53 +11:00
ignore_map.rs
Simplify the directives for ignoring coverage-test modes
2024-10-08 22:51:53 +11:00
ignore_run.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
ignore_run.rs
Simplify the directives for ignoring coverage-test modes
2024-10-08 22:51:53 +11:00
inline_mixed.rs
coverage: Regression test for inlining into an uninstrumented crate
2024-11-02 23:20:14 +11:00
inline-dead.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
inline-dead.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
inline-dead.rs
Tweak various coverage test files for slightly nicer formatting
2024-05-29 14:34:11 +10:00
inline.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
inline.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
inline.rs
…
inner_items.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
inner_items.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
inner_items.rs
Tweak various coverage test files for slightly nicer formatting
2024-05-29 14:34:11 +10:00
issue-83601.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
issue-83601.coverage
…
issue-83601.rs
…
issue-84561.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
issue-84561.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
issue-84561.rs
…
issue-85461.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
issue-85461.coverage
…
issue-85461.rs
…
issue-93054.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
issue-93054.coverage
…
issue-93054.rs
…
lazy_boolean.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
lazy_boolean.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
lazy_boolean.rs
…
let_else_loop.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
let_else_loop.coverage
Revert "Auto merge of #130766 - clarfonthey:stable-coverage-attribute, r=wesleywiser"
2024-12-23 12:30:37 +11:00
let_else_loop.rs
Revert "Auto merge of #130766 - clarfonthey:stable-coverage-attribute, r=wesleywiser"
2024-12-23 12:30:37 +11:00
long_and_wide.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
long_and_wide.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
long_and_wide.rs
…
loop_break_value.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
loop_break_value.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
loop_break_value.rs
…
loop-break.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
loop-break.coverage
coverage: Replace the old span refiner with a single function
2024-06-12 22:59:24 +10:00
loop-break.rs
coverage: Add tests/coverage/loop-break.rs
2024-06-12 22:48:11 +10:00
loops_branches.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
loops_branches.coverage
…
loops_branches.rs
…
macro_in_closure.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
macro_in_closure.coverage
Revert "Auto merge of #130766 - clarfonthey:stable-coverage-attribute, r=wesleywiser"
2024-12-23 12:30:37 +11:00
macro_in_closure.rs
Revert "Auto merge of #130766 - clarfonthey:stable-coverage-attribute, r=wesleywiser"
2024-12-23 12:30:37 +11:00
macro_name_span.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
macro_name_span.coverage
…
macro_name_span.rs
…
match_or_pattern.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
match_or_pattern.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
match_or_pattern.rs
…
nested_loops.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
nested_loops.coverage
…
nested_loops.rs
…
no_cov_crate.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
no_cov_crate.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
no_cov_crate.rs
Revert "Auto merge of #130766 - clarfonthey:stable-coverage-attribute, r=wesleywiser"
2024-12-23 12:30:37 +11:00
no_spans_if_not.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
no_spans_if_not.coverage
…
no_spans_if_not.rs
…
no_spans.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
no_spans.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
no_spans.rs
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
no-core.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
no-core.coverage
Coverage test for allowing coverage in a #![no_core] crate
2024-11-24 21:12:40 +11:00
no-core.rs
Coverage test for allowing coverage in a #![no_core] crate
2024-11-24 21:12:40 +11:00
overflow.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
overflow.coverage
coverage: Completely overhaul counter assignment, using node-flow graphs
2025-01-16 22:07:18 +11:00
overflow.rs
…
panic_unwind.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
panic_unwind.coverage
coverage: Completely overhaul counter assignment, using node-flow graphs
2025-01-16 22:07:18 +11:00
panic_unwind.rs
…
partial_eq.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
partial_eq.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
partial_eq.rs
Manually run x fmt on all source files in tests/coverage/
2024-05-29 14:34:17 +10:00
README.md
…
simple_loop.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
simple_loop.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
simple_loop.rs
…
simple_match.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
simple_match.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
simple_match.rs
…
sort_groups.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
sort_groups.coverage
coverage: Restrict empty-span expansion to only cover { and }
2024-11-08 20:43:08 +11:00
sort_groups.rs
…
test_harness.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
test_harness.coverage
…
test_harness.rs
…
tight_inf_loop.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
tight_inf_loop.coverage
…
tight_inf_loop.rs
…
trivial.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
trivial.coverage
…
trivial.rs
…
try_error_result.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
try_error_result.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
try_error_result.rs
Tweak various coverage test files for slightly nicer formatting
2024-05-29 14:34:11 +10:00
try-in-macro.attr.cov-map
coverage: Regression test for "function name is empty" bug
2025-07-29 11:36:43 +10:00
try-in-macro.attr.coverage
coverage: Regression test for "function name is empty" bug
2025-07-29 11:36:43 +10:00
try-in-macro.bang.cov-map
coverage: Regression test for "function name is empty" bug
2025-07-29 11:36:43 +10:00
try-in-macro.bang.coverage
coverage: Regression test for "function name is empty" bug
2025-07-29 11:36:43 +10:00
try-in-macro.derive.cov-map
coverage: Regression test for "function name is empty" bug
2025-07-29 11:36:43 +10:00
try-in-macro.derive.coverage
coverage: Regression test for "function name is empty" bug
2025-07-29 11:36:43 +10:00
try-in-macro.rs
coverage: Regression test for "function name is empty" bug
2025-07-29 11:36:43 +10:00
unicode.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
unicode.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
unicode.rs
…
unreachable.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
unreachable.coverage
Revert "Auto merge of #130766 - clarfonthey:stable-coverage-attribute, r=wesleywiser"
2024-12-23 12:30:37 +11:00
unreachable.rs
Revert "Auto merge of #130766 - clarfonthey:stable-coverage-attribute, r=wesleywiser"
2024-12-23 12:30:37 +11:00
unused_mod.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
unused_mod.coverage
…
unused_mod.rs
…
unused.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
unused.coverage
…
unused.rs
…
uses_crate.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
uses_crate.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
uses_crate.rs
…
uses_inline_crate.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
uses_inline_crate.coverage
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
uses_inline_crate.rs
…
while_early_ret.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
while_early_ret.coverage
…
while_early_ret.rs
…
while.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
while.coverage
…
while.rs
…
yield.cov-map
coverage: Only merge adjacent coverage spans
2025-05-06 20:42:25 +10:00
yield.coverage
Manually run x fmt on all source files in tests/coverage/
2024-05-29 14:34:17 +10:00
yield.rs
Manually run x fmt on all source files in tests/coverage/
2024-05-29 14:34:17 +10:00

README.md

The tests in this directory are shared by two different test modes, and can be run in multiple different ways:

  • ./x.py test coverage-map (compiles to LLVM IR and checks coverage mappings)
  • ./x.py test coverage-run (runs a test binary and checks its coverage report)
  • ./x.py test coverage (runs both coverage-map and coverage-run)

Maintenance note

These tests can be sensitive to small changes in MIR spans or MIR control flow, especially in HIR-to-MIR lowering or MIR optimizations.

If you haven't touched the coverage code directly, and the tests still pass in coverage-run mode, then it should usually be OK to just re-bless the mappings as necessary with ./x.py test coverage-map --bless, without worrying too much about the exact changes.