Bad error trace

[danielchasehooper]

Zig Version

0.10.0-dev.2083+13d1798ea

Steps to Reproduce

run zig test phantomErrorTrace.zig

// phantomErrorTrace.zig
const std = @import("std");

fn alwaysErrors() !void {
    return error.BUG_ThisErrorShouldNotAppearInAnyTrace;
}

test "test expected error" {
    try std.testing.expectError(error.BUG_ThisErrorShouldNotAppearInAnyTrace, alwaysErrors());
}

test "trigger error trace" {
    return error.WeExpectToSeeThisInTheTrace;
}

Expected Behavior

should only see error trace for the second test

1/2 test "test expected error"... OK
2/2 test "trigger error trace"... FAIL (WeExpectToSeeThisInTheTrace)
FAIL (WeExpectToSeeThisInTheTrace)
/Users/daniel/Developer/zigtests/phantomerrortrace.zig:14:5: 0x1005a992f in test "trigger error trace" (test)
    return error.WeExpectToSeeThisInTheTrace;
    ^
1 passed; 0 skipped; 1 failed.

Actual Behavior

Error trace from the first test appears in the error trace for the second test

1/2 test "test expected error"... OK
2/2 test "trigger error trace"... FAIL (WeExpectToSeeThisInTheTrace)
FAIL (WeExpectToSeeThisInTheTrace)
/Users/daniel/Developer/zigtests/phantomerrortrace.zig:6:5: 0x10085dce7 in alwaysErrors (test)
    return error.BUG_ThisErrorShouldNotAppearInAnyTrace;
    ^
/Users/daniel/Developer/zigtests/phantomerrortrace.zig:14:5: 0x10085cd3b in test "trigger error trace" (test)
    return error.WeExpectToSeeThisInTheTrace;
    ^
1 passed; 0 skipped; 1 failed.

[squeek502]

Very likely to be a duplicate of #1923