Test DMD with bounds checking for Array.opIndex

[dlangBugzillaToGithub]

Tim reported this on 2024-08-30T15:59:40Z

Transferred from https://issues.dlang.org/show_bug.cgi?id=24734

Description

Currently dmd.root.array.Array.opIndex has no bounds checking enabled for performance. Adding `assert(i < length);` would have found https://issues.dlang.org/show_bug.cgi?id=24733 earlier. The automatic bounds checking for the buffer would not be enough, because the internal buffer was big enough.