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test: run 5 rounds of the reload() while Bun.build() test on a debug build with ASAN #47241

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test: run 5 rounds of the reload() while Bun.build() test on a debug build with ASAN #47241

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d24fa20
test: run 5 rounds of the reload()/Bun.build() race test on a debug b…
robobun Oct 28, 2026
72567f0
test: keep 40 rounds on a debug build without ASAN
robobun Oct 28, 2026
94d8d1d
ci: retrigger
robobun Oct 29, 2026
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21 changes: 18 additions & 3 deletions test/js/bun/util/filesystem_router.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,17 @@ import { FileSystemRouter } from "bun";
import { heapStats } from "bun:jsc";
import { expect, it } from "bun:test";
import fs, { mkdirSync, rmSync } from "fs";
import { bunEnv, bunExe, isASAN, isMacOS, isWindows, normalizeBunSnapshot, tempDir, tmpdirSync } from "harness";
import {
bunEnv,
bunExe,
isASAN,
isDebug,
isMacOS,
isWindows,
normalizeBunSnapshot,
tempDir,
tmpdirSync,
} from "harness";
import path, { dirname } from "path";

function createTree(basedir: string, paths: string[]) {
Expand Down Expand Up @@ -1023,6 +1033,11 @@ it("reload() while Bun.build() resolves the same directory", async () => {
// runs on the bundler thread) share the process-global directory-entry cache.
// Run in a subprocess so a crash is observable as a signal instead of taking
// down the test runner.
//
// A round is 4 builds, and a debug build with ASAN takes about 0.4 s for each
// (a release build 0.02 s). ASAN fails on the first read of a freed listing,
// so that build needs few rounds.
const rounds = isDebug && isASAN ? 5 : 40;
const files: Record<string, string> = {
"fixture.ts": /* ts */ `
import path from "path";
Expand All @@ -1044,7 +1059,7 @@ it("reload() while Bun.build() resolves the same directory", async () => {
await Bun.build({ entrypoints, target: "bun", throw: false });
let matches = 0;
let buildsOk = true;
for (let round = 0; round < 40; round++) {
for (let round = 0; round < ${rounds}; round++) {
const builds = Array.from({ length: 4 }, () =>
Bun.build({ entrypoints, target: "bun", throw: false }),
);
Expand Down Expand Up @@ -1078,7 +1093,7 @@ it("reload() while Bun.build() resolves the same directory", async () => {
stderr: normalizeBunSnapshot(stderr, String(dir)),
exitCode,
signalCode: proc.signalCode,
}).toEqual({ stdout: "matches 2000 builds-ok true", stderr: "", exitCode: 0, signalCode: null });
}).toEqual({ stdout: `matches ${rounds * 50} builds-ok true`, stderr: "", exitCode: 0, signalCode: null });
}, 60_000);

it("loads routes from a directory already cached by Bun.build()", async () => {
Expand Down
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