wasm2wast prints incorrect name for global export

[sunfishcode]

With this binary:

$ hexdump -C t.o
00000000  00 61 73 6d 0d 00 00 00  01 84 80 80 80 00 01 60  |.asm...........`|
00000010  00 00 03 82 80 80 80 00  01 00 06 86 80 80 80 00  |................|
00000020  01 7f 01 41 00 0b 07 90  80 80 80 00 02 03 62 61  |...A..........ba|
00000030  72 00 00 06 64 5f 67 6c  6f 62 03 00 0a 85 80 80  |r...d_glob......|
00000040  80 00 01 03 00 0f 0b 00  8b 80 80 80 00 04 6e 61  |..............na|
00000050  6d 65 01 03 62 61 72 00                           |me..bar.|
00000058

wasm2wast prints this:

$ wasm2wast t.o
(module
  (type (;0;) (func))
  (func bar (type 0)
    return)
  (global (;0;) (mut i32) (i32.const 0))
  (export "bar" (func bar))
  (export "d_glob" (global bar)))

It's printing bar as the name of the global in the export, which is incorrect. It appears to be using a name from the "name" section, which only contains function names.

The "name" section is for function names, but there doesn't currently appear to be a section for global names. I filed WebAssembly/design#964 to ask whether there's interest in adding sections for globals and so on.