Reduce 0.3.0 coverage footprint and retain disk evidence

.github/workflows/release.yml

@@ -230,6 +230,8 @@ jobs:
     runs-on: macos-15
     env:
       CARGO_INCREMENTAL: "0"
+      CARGO_PROFILE_DEV_DEBUG: line-tables-only
+      CARGO_PROFILE_TEST_DEBUG: line-tables-only
     steps:
       - uses: actions/checkout@v7
         with:
@@ -260,6 +262,7 @@ jobs:
           path: |
             .temp/gate-run/
             .temp/**/failed/**/ocd.log
+            .temp/single-binary-run/failed/**/*.log
             target/llvm-cov/summary.json
             target/llvm-cov/lcov.info
 

docs/references/testing.md

@@ -330,6 +330,8 @@ APFS 使用 clone，Linux 使用可用的 filesystem reflink 保存独立 object
 缓存替换不能改变留存 object，现有留存目录不能被覆盖。
 coverage 只运行一轮；调度器拒绝把已知 coverage 插桩环境用于最终未插桩 Gate。
 coverage 使用 cargo-llvm-cov `show-env --sh` 的外部运行器接口和相同 workspace 调度器，
+release CI 禁用增量编译，并使用 `line-tables-only` 调试信息减少构建占用；LLVM coverage
+插桩、优化级别、生产停写阈值和 90% 门槛保持不变。Gate 在构建后输出文件系统余量。
 构建缓存继续放在 `target/llvm-cov-target/`。每轮在 `.temp/coverage/run-*/` 保留独立
 profile 池、merged profdata 和精确 object 副本，拒绝覆写已存在 object 目录；缓存重建不会
 修改证据副本，也不把先前轮次计数混入本轮。报告先写入本轮目录；90% 门槛通过后，

test/conformance/baseline.json

@@ -1,6 +1,6 @@
 {
   "schemaVersion": 1,
-  "sourceDigest": "8a1f41ba31595329dbfac52424dcbcdfba1b0715ebd44f27ac0c81a97acdedb0",
+  "sourceDigest": "b60a8367724dfaa40f4d567fa998a99eb4939de830c5d66f4a08c715c5165f67",
   "sourceDigestScope": "git-visible production, test, toolchain, manifest, and maintained reference inputs; excludes generated Python caches, test/conformance/baseline.json, and non-reference docs",
   "workerdLockSha256": "d685331dc96e294b10a1b2365065ab6934d920c037d071b020552c7fc4f0d37f",
   "workerd": {

test/gate.py

@@ -598,6 +598,10 @@ def build_targets(targets, directory, workspace):
                 except (OSError, subprocess.CalledProcessError):
                     pass  # Other filesystems still require independent copies.
             shutil.copy2(executable, destination)
+        filesystem = os.statvfs(ROOT)
+        print('Coverage filesystem (blocks, free, available, block bytes): '
+              f'{filesystem.f_blocks}, {filesystem.f_bfree}, '
+              f'{filesystem.f_bavail}, {filesystem.f_frsize}', flush=True)
     return artifacts, {'invocations': 1, 'seconds': time.monotonic() - start,
                        'executables': {name: digest(Path(artifacts[name])) for name in cargo_targets},
                        'typed_targets': typed_inputs}