callmekohei commented 6 years ago

Repro steps

Step A

create mdb file


sample9$ ls
foo.fsx
sample9$ cat foo.fsx 
let x = "apple"
let y = "banana"
let mutable z = "cherry"
z <- "grape"

let foo () = let mutable a = 100 let b = 200 a <- 300 (a,b)

foo() sample9$ fsharpc -g --optimize- foo.fsx F# Compiler for F# 4.1 Freely distributed under the Apache 2.0 Open Source License sample9$ ls foo.exe foo.exe.mdb foo.fsx

2. Step B
### debug foo.exe with [sdb](https://github.com/mono/sdb)

sample9$ sdb 'run foo.exe' Welcome to the Mono soft debugger (sdb 1.5.6548.37600) Type 'help' for a list of commands or 'quit' to exit

Inferior process '2687' ('foo.exe') started Inferior process '2687' ('foo.exe') exited with code '0' (sdb) watch add z Added watch '0' with expression 'z' (sdb) bp add at foo.fsx 3 Breakpoint '0' added at '/Users/callmekohei/tmp/sample9/foo.fsx:3' (sdb) r Inferior process '2709' ('foo.exe') started Hit breakpoint at '/Users/callmekohei/tmp/sample9/foo.fsx:3'

0 [0x0000000D] <StartupCode$foo>.$Foo$fsx.main@ at /Users/callmekohei/tmp/sample9/foo.fsx:3

let mutable z = "cherry" (sdb) watch

0 'z': it = z

(sdb) s Inferior process '2709' ('foo.exe') resumed Inferior process '2709' ('foo.exe') suspended

0 [0x00000017] <StartupCode$foo>.$Foo$fsx.main@ at /Users/callmekohei/tmp/sample9/foo.fsx:4

z <- "grape" (sdb) watch

0 'z': it = z

(sdb) s Inferior process '2709' ('foo.exe') resumed Inferior process '2709' ('foo.exe') suspended

0 [0x00000021] <StartupCode$foo>.$Foo$fsx.main@ at /Users/callmekohei/tmp/sample9/foo.fsx:12

foo() (sdb) watch

0 'z': it = z

(sdb) kill Inferior process '2709' ('foo.exe') exited with code '0' (sdb) q Bye sample9$


### like this
![untitled](https://user-images.githubusercontent.com/17691683/34241138-b10e72de-e656-11e7-9f76-d6fc1e06ad0b.gif)

# Expected behavior

watch `z`

0 'z': string it = "cherry"

step into

watch `z`

0 'z': string it = "grape"


# Actual behavior

watch `z`

0 'z': it = z

step into

watch `z`

0 'z': it = z

# Known workarounds

I do not know...

# Related information 

* Operating system

tmp$ sw_vers ProductName: Mac OS X ProductVersion: 10.13.1 BuildVersion: 17B1003

tmp$ uname -a Darwin callmekoheis-MacBook-Air.local 17.2.0 Darwin Kernel Version 17.2.0: Fri Sep 29 18:27:05 PDT 2017; root:xnu-4570.20.62~3/RELEASE_X86_64 x86_64


* .NET Runtime, CoreCLR or Mono Version

tmp$ mono --version Mono JIT compiler version 5.0.1.1 (2017-02/5077205 Sun Sep 17 18:29:46 BST 2017) Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com TLS: normal SIGSEGV: altstack Notification: kqueue Architecture: amd64 Disabled: none Misc: softdebug LLVM: supported, not enabled. GC: sgen (concurrent by default)

* Editing Tools (e.g. Visual Studio Version)

tmp$ vim --version VIM - Vi IMproved 8.0 (2016 Sep 12, compiled Dec 18 2017 09:51:58) macOS version Included patches: 1-1350 Compiled by Homebrew Huge version without GUI. Features included (+) or not (-): +acl +farsi +mouse_sgr -tag_any_white +arabic +file_in_path -mouse_sysmouse -tcl +autocmd +find_in_path +mouse_urxvt +termguicolors -autoservername +float +mouse_xterm +terminal -balloon_eval +folding +multi_byte +terminfo +balloon_eval_term -footer +multi_lang +termresponse -browse +fork() -mzscheme +textobjects ++builtin_terms -gettext +netbeans_intg +timers +byte_offset -hangul_input +num64 +title +channel +iconv +packages -toolbar +cindent +insert_expand +path_extra +user_commands -clientserver +job +perl +vertsplit +clipboard +jumplist +persistent_undo +virtualedit +cmdline_compl +keymap +postscript +visual +cmdline_hist +lambda +printer +visualextra +cmdline_info +langmap +profile +viminfo +comments +libcall -python +vreplace +conceal +linebreak +python3 +wildignore +cryptv +lispindent +quickfix +wildmenu +cscope +listcmds +reltime +windows +cursorbind +localmap +rightleft +writebackup +cursorshape -lua +ruby -X11 +dialog_con +menu +scrollbind -xfontset +diff +mksession +signs -xim +digraphs +modify_fname +smartindent -xpm -dnd +mouse +startuptime -xsmp -ebcdic -mouseshape +statusline -xterm_clipboard +emacs_tags +mouse_dec -sun_workshop -xterm_save +eval -mouse_gpm +syntax
+ex_extra -mouse_jsbterm +tag_binary
+extra_search +mouse_netterm +tag_old_static
system vimrc file: "$VIM/vimrc" user vimrc file: "$HOME/.vimrc" 2nd user vimrc file: "~/.vim/vimrc" user exrc file: "$HOME/.exrc" defaults file: "$VIMRUNTIME/defaults.vim" fall-back for $VIM: "/usr/local/share/vim" Compilation: clang -c -I. -Iproto -DHAVE_CONFIG_H -DMACOS_X -DMACOS_X_DARWIN -g -O2 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1
Linking: clang -L. -L /BuildRoot/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.Internal.sdk/usr/local/libressl/lib -L/BuildRoot/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.Internal.sdk/usr/local/lib -L/usr/local/lib -o vim -lm -lncurses -liconv -framework AppKit -fstack-protector -L/System/Library/Perl/5.18/darwin-thread-multi-2level/CORE -lperl -L/usr/local/opt/python3/Frameworks/Python.framework/Versions/3.6/lib/python3.6/config-3.6m-darwin -lpython3.6m -framework CoreFoundation -lruby.2.3.0 -lobjc