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collect all stderr on fuzzing crash

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This commit is contained in:
Kendall Condon
2026-04-22 20:53:33 -04:00
parent 122e0c26f2
commit 332d632ccc
1 changed files with 7 additions and 3 deletions
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lib/std/Build/Step/Run.zig
+7 -3
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@@ -2166,11 +2166,15 @@ const FuzzTestRunner = struct {
const result = completion.result;
switch (completion.index % 3) {
0 => try f.completeStdinWrite(id, result.file_write_streaming catch |e| switch (e) {
error.BrokenPipe => return f.instanceEos(id),
// Avoid calling `instanceEos` until EndOfStream is seen with stderr so
// that all stderr is collected.
error.BrokenPipe => continue,
else => |write_e| return write_e,
}),
1 => try f.completeStdoutRead(id, result.file_read_streaming catch |e| switch (e) {
error.EndOfStream => return f.instanceEos(id),
// Avoid calling `instanceEos` until EndOfStream is seen with stderr so
// that all stderr is collected.
error.EndOfStream => continue,
else => |read_e| return read_e,
}),
2 => try f.completeStderrRead(id, result.file_read_streaming catch |e| switch (e) {
@@ -2480,7 +2484,7 @@ const FuzzTestRunner = struct {
const step_owner = f.run.step.owner;
const arena = step_owner.allocator;
// Collect any remaining stderr
// Collect any available stderr
while (f.batch.next()) |completion| {
if (completion.index % 3 != 2) continue;
const len = completion.result.file_read_streaming catch continue;