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web ui: fix not sending initial context sometimes

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This would cause the web ui to crash in js or wasm.
This commit is contained in:
Andrew Kelley 2025-09-25 17:16:41 -07:00
parent 2da8ec9865
commit 52a13f6a7f
1 changed files with 8 additions and 2 deletions
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10
lib/std/Build/Fuzz.zig
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@ -257,7 +257,12 @@ pub fn serveSourcesTar(fuzz: *Fuzz, req: *std.http.Server.Request) !void {
pub const Previous = struct {
unique_runs: usize,
entry_points: usize,
pub const init: Previous = .{ .unique_runs = 0, .entry_points = 0 };
sent_source_index: bool,
pub const init: Previous = .{
.unique_runs = 0,
.entry_points = 0,
.sent_source_index = false,
};
};
pub fn sendUpdate(
fuzz: *Fuzz,
@ -280,7 +285,8 @@ pub fn sendUpdate(
const n_runs = @atomicLoad(usize, &cov_header.n_runs, .monotonic);
const unique_runs = @atomicLoad(usize, &cov_header.unique_runs, .monotonic);
{
if (unique_runs != 0 and prev.unique_runs == 0) {
if (!prev.sent_source_index) {
prev.sent_source_index = true;
// We need to send initial context.
const header: abi.SourceIndexHeader = .{
.directories_len = @intCast(coverage_map.coverage.directories.entries.len),