fix(es/codegen): Don't call cmt.get_leading for dummy span

[mischnic]

This was the only place where Comments were queried for dummy spans (BytePos(0))

[changeset-bot]

⚠️ No Changeset found

Latest commit: e692980

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[codspeed-hq]

CodSpeed Performance Report

Merging #10568 will create unknown performance changes

_{Comparing mischnic:mischnic/no-comments-for-dummy (ca1a9d5) with main (16e204d)}

Summary

🆕 144 new benchmarks

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
🆕	deserialization of serde	N/A	2.5 µs	N/A
🆕	serialization of serde	N/A	2.9 µs	N/A
🆕	css/visitor/compare/clone	N/A	5 ms	N/A
🆕	css/visitor/compare/fold_span	N/A	6 ms	N/A
🆕	css/visitor/compare/fold_span_panic	N/A	6 ms	N/A
🆕	css/visitor/compare/visit_mut_span	N/A	5.4 ms	N/A
🆕	css/visitor/compare/visit_mut_span_panic	N/A	5.4 ms	N/A
🆕	css/lexer/bootstrap_5_1_3	N/A	11.2 ms	N/A
🆕	css/lexer/foundation_6_7_4	N/A	9.1 ms	N/A
🆕	css/lexer/tailwind_3_1_1	N/A	1.8 ms	N/A
🆕	css/parser/bootstrap_5_1_3	N/A	48.6 ms	N/A
🆕	css/parser/foundation_6_7_4	N/A	38.4 ms	N/A
🆕	css/parser/tailwind_3_1_1	N/A	7.5 ms	N/A
🆕	es/codegen/colors	N/A	70.8 µs	N/A
🆕	es/codegen/large	N/A	648.3 µs	N/A
🆕	es/codegen/with-parser/colors	N/A	182.9 µs	N/A
🆕	es/codegen/with-parser/large	N/A	1.4 ms	N/A
🆕	es/lexer/angular	N/A	12.7 ms	N/A
🆕	es/lexer/backbone	N/A	1.8 ms	N/A
🆕	es/lexer/cal-com	N/A	34.9 ms	N/A
...	...	...	...	...

ℹ️ Only the first 20 benchmarks are displayed. Go to the app to view all benchmarks.

[mischnic]

Seems unrelated?

 Running tests/exec.rs (target/debug/deps/exec-5ccf6224773853ae) running 550 tests ➤ YN0000: Yarn detected that the current workflow is executed from a public pull request. For safety the hardened mode has been enabled. ➤ YN0000: It will prevent malicious lockfile manipulations, in exchange for a slower install time. You can opt-out if necessary; check our documentation for more details. ➤ YN0000: · Yarn 4.0.2 ➤ YN0000: ┌ Resolution step Resolution step ➤ YN0000: └ Completed in 6s 61ms ➤ YN0000: ┌ Post-resolution validation Post-resolution validation ➤ YN0000: └ Completed ➤ YN0000: ┌ Fetch step Fetch step ➤ YN0000: └ Completed in 0s 484ms ➤ YN0000: ┌ Link step Link step ➤ YN0000: └ Completed in 0s 718ms ➤ YN0000: · Done with warnings in 7s 534ms node:internal/process/promises:391 triggerUncaughtException(err, true /* fromPromise */); ^ [Error: ENOENT: no such file or directory, open '/home/runner/work/swc/swc/packages/helpers/cjs/_create_for_of_iterator_helper_loose.cjs'] { errno: -2, code: 'ENOENT', syscall: 'open', path: '/home/runner/work/swc/swc/packages/helpers/cjs/_create_for_of_iterator_helper_loose.cjs' } Node.js v20.19.2 test run_babel_fixture_exec_test_tests__babel_exec__packages__babel_core__test__fixtures__transformation__misc__regression_7064__exec_js ... FAILED test run_babel_fixture_exec_test_tests__babel_exec__packages__babel_core__test__fixtures__transformation__regenerator__destructuring_parameters__exec_js ... FAILED test ru