No compile errors with -fno-emit-bin if c files in the build

[leecannon]

Zig Version

0.14.0-dev.2989+bf6ee7cb3

Steps to Reproduce and Observed Behavior

With an empty c file called empty.c and main.zig containing:

pub fn main() void {
    const a: bool = 2;
    _ = a;
}

$ zig build-exe -fno-emit-bin empty.c main.zig
$ echo $?                                                           
0

The correct behavior occurs without the c file:

$ zig build-exe -fno-emit-bin main.zig  
main.zig:2:21: error: expected type 'bool', found 'comptime_int'
    const a: bool = 2;
                    ^
referenced by:
    posixCallMainAndExit: /home/lee/zig/0.14.0-dev.2989+bf6ee7cb3/files/lib/std/start.zig:656:37
    _start: /home/lee/zig/0.14.0-dev.2989+bf6ee7cb3/files/lib/std/start.zig:464:40
    3 reference(s) hidden; use '-freference-trace=5' to see all references
$ echo $?                                             
1

Expected Behavior

The same error as without -fno-emit-bin:

$ zig build-exe empty.c main.zig              
main.zig:2:21: error: expected type 'bool', found 'comptime_int'
    const a: bool = 2;
                    ^
referenced by:
    posixCallMainAndExit: /home/lee/zig/0.14.0-dev.2989+bf6ee7cb3/files/lib/std/start.zig:656:37
    _start: /home/lee/zig/0.14.0-dev.2989+bf6ee7cb3/files/lib/std/start.zig:464:40
    3 reference(s) hidden; use '-freference-trace=5' to see all references
$ echo $?                                                           
1

[leecannon]

This issue is caused by comp.remaining_prelink_tasks being incremented here

zig/src/Compilation.zig

Line 1719 in 08d661f

comp.remaining_prelink_tasks += @intCast(comp.c_object_table.count());

but it is never decremented so performAllTheWorkInner returns early

zig/src/Compilation.zig

Lines 3852 to 3855 in 08d661f

	if (comp.remaining_prelink_tasks > 0) {
	// Indicates an error occurred preventing prelink phase from completing.
	return;
	}

but no error has been emitted so compilation exits without reporting failure.

But I'm struggling to follow through the logic to actually get to the bottom of this.