Coercion from slice of non-const pointer to slice of const pointer, during param passing, causes "broken LLVM module found: Call parameter type does not match function signature!"

[jumpnbrownweasel]

Zig Version

zig-linux-x86_64-0.9.0 and zig-linux-x86_64-0.10.0-dev.290+3901b6fb0

Steps to Reproduce

Here's a narrowed down case that fails:

const std = @import("std");

pub fn main() !void {
    var x: usize = 123;
    var array: [1]*usize = .{&x};
    f(array[0..1]);
}

fn f(slice: []*const usize) void {
    std.log.info("{}", .{slice.len});
}

// Does not fail if I remove const from the parameter in f.
//
// Does not fail if I first assign to a local in main and pass the local to f.
//
//  const slice: []*const usize = array[0..1];
//  f(slice);

Expected Behavior

Expected coercion from slice of non-const pointers to slice of const pointers to work. This does work during assignment, just not parameter passing.

Actual Behavior

Output:

broken LLVM module found: Call parameter type does not match funct
ion signature!
  %3 = bitcast %"[]*const usize"* %1 to %"[]*usize"*, !dbg !17223
 %"[]*const usize"*  call fastcc void @f(%"[]*usize"* %3), !dbg !1
7224

This is a bug in the Zig compiler.thread 153925 panic:
Unable to dump stack trace: debug info stripped
Aborted (core dumped)

I get this result on the latest master build and the 0.9.0 build from the download page:

zig-linux-x86_64-0.10.0-dev.290+3901b6fb0
zig-linux-x86_64-0.9.0

[jumpnbrownweasel]

I have found several issues on github with a similar error, but not exactly the same. The closest seems to be 7908 since it also has a bitcast issue. But unlike 7908, here the bitcast issue is specifically related to coercion from a slice of pointers to a slice of const pointers, when the coercion is via parameter passing.

[jumpnbrownweasel]

Since this coercion works during assignment, a workaround is to assign to a local, then pass the local to the function.

[Vexu]

Duplicate of #4907, #4904, #6147.