上周工作正常。我会打开
cd myprojectdir
erl
(erlang shell).
c(room).
{ok, R} = room:go().
然后我可以使用gen_server向R发送消息，与我的房间模块进行交互。
我开始在一个牛仔路由分支。我看到一切正常，当我今天看着它时，我遇到了编译错误。所以我回到了我的主分公司。仍然在shell中出现错误，甚至回滚了一些提交，嗯。
当我尝试呼叫房间时：go（），其他模块打印为undef。如果我依次编译它们，那么room：go（）就可以了。
房间踢桌子，桌子开始时钟，座位和游戏，游戏开始和行动。
https://github.com/quantumproductions/tunnel
2> c(game).
{ok,game}
3> game:go().
** exception exit: undef
in function board:go/0
called as board:go()
in call from game:init/1 (game.erl, line 57)
in call from gen_server:init_it/6 (gen_server.erl, line 328)
in call from proc_lib:init_p_do_apply/3 (proc_lib.erl, line 247)
4> c(board).
{ok,board}
5> game:go().
** exception exit: undef
in function actions:go/0
called as actions:go()
in call from game:init/1 (game.erl, line 58)
in call from gen_server:init_it/6 (gen_server.erl, line 328)
in call from proc_lib:init_p_do_apply/3 (proc_lib.erl, line 247)
6> c(actions).
{ok,actions}
7> actions:go().
{ok,<0.93.0>}
8> game:go().
{ok,<0.95.0>}
9> c(room).
{ok,room}
10> room:go().
** exception exit: undef
in function table:go/0
called as table:go()
in call from room:tablePids/2 (room.erl, line 33)
in call from room:init/1 (room.erl, line 80)
in call from gen_server:init_it/6 (gen_server.erl, line 328)
in call from proc_lib:init_p_do_apply/3 (proc_lib.erl, line 247)
11> c(table).
{ok,table}
12> room:go().
** exception exit: undef
in function clock:go/0
called as clock:go()
in call from table:init/1 (table.erl, line 7)
in call from gen_server:init_it/6 (gen_server.erl, line 328)
in call from proc_lib:init_p_do_apply/3 (proc_lib.erl, line 247)
13> c(clock).
{ok,clock}
14> room:go().
** exception exit: undef
in function seats:go/0
called as seats:go()
in call from table:init/1 (table.erl, line 8)
in call from gen_server:init_it/6 (gen_server.erl, line 328)
in call from proc_lib:init_p_do_apply/3 (proc_lib.erl, line 247)
15> c(seats).
{ok,seats}
16> room:go().
** exception exit: undef
in function hall:go/0
called as hall:go()
in call from room:init/1 (room.erl, line 81)
in call from gen_server:init_it/6 (gen_server.erl, line 328)
in call from proc_lib:init_p_do_apply/3 (proc_lib.erl, line 247)
17> c(hall).
{ok,hall}
18> room:go().
{ok,<0.159.0>}
19>
=ERROR REPORT==== 29-Jan-2017::17:37:45 ===
Error in process <0.169.0> with exit value:
{undef,[{s,s,[<0.159.0>,update],[]}]}
=ERROR REPORT==== 29-Jan-2017::17:37:46 ===
Error in process <0.170.0> with exit value:
{undef,[{s,s,[<0.159.0>,update],[]}]}
=ERROR REPORT==== 29-Jan-2017::17:37:47 ===
Error in process <0.171.0> with exit value:
{undef,[{s,s,[<0.159.0>,update],[]}]}
=ERROR REPORT==== 29-Jan-2017::17:37:48 ===
Error in process <0.172.0> with exit value:
{undef,[{s,s,[<0.159.0>,update],[]}]}
=ERROR REPORT==== 29-Jan-2017::17:37:49 ===
Error in process <0.173.0> with exit value:
{undef,[{s,s,[<0.159.0>,update],[]}]}
=ERROR REPORT==== 29-Jan-2017::17:37:50 ===
Error in process <0.174.0> with exit value:
{undef,[{s,s,[<0.159.0>,update],[]}]}
每个go（）函数只是
的便利go() ->
gen_server:start_link(?MODULE, [], []).
版本：
Erlang/OTP 19 [erts-8.2] [source] [64-bit] [smp:8:8] [async-threads:10] [hipe] [kernel-poll:false] [dtrace]
Eshell V8.2 (abort with ^G)
发生了什么事？
编辑：
s：s来自我的快捷方式模块
-module(s).
-export([s/2]).
% Shortcuts.
% Send
s(Pid, Message) ->
gen_server:call(Pid, Message).
更新消息在Room中的计时器上发送，该计时器尝试向每个表发送更新。
编辑：
我更改了ZERO代码。这是我现在跑步时会发生什么...这是因为我已经拥有* .beam文件了吗？
=ERROR REPORT==== 29-Jan-2017::17:50:19 ===
Error in process <0.200.0> with exit value:
{undef,[{s,s,[<0.59.0>,update],[]}]}
BREAK: (a)bort (c)ontinue (p)roc info (i)nfo (l)oaded
(v)ersion (k)ill (D)b-tables (d)istribution
^C~/tunnel:.ls
actions.beam clock.beam hall.beam s.erl table.erl
actions.erl clock.erl hall.erl seats.beam timer.erl
board.beam game.beam room.beam seats.erl
board.erl game.erl room.erl table.beam
~/tunnel:.erl
Erlang/OTP 19 [erts-8.2] [source] [64-bit] [smp:8:8] [async-threads:10] [hipe] [kernel-poll:false] [dtrace]
Eshell V8.2 (abort with ^G)
1> c(board).
{ok,board}
2> c(all).
all.erl: no such file or directory
error
3> c().
** exception error: undefined shell command c/0
4> c(room).
{ok,room}
5> c(s).
{ok,s}
6> room:go().
{ok,<0.96.0>}
7>
BREAK: (a)bort (c)ontinue (p)roc info (i)nfo (l)oaded
(v)ersion (k)ill (D)b-tables (d)istribution
^C~/tunnel:.erl
Erlang/OTP 19 [erts-8.2] [source] [64-bit] [smp:8:8] [async-threads:10] [hipe] [kernel-poll:false] [dtrace]
Eshell V8.2 (abort with ^G)
1> c(room).
{ok,room}
2> room:go().
{ok,<0.72.0>}
3> room:test().
All 4 tests passed.
ok
4>
BREAK: (a)bort (c)ontinue (p)roc info (i)nfo (l)oaded
(v)ersion (k)ill (D)b-tables (d)istribution
^C~/tunnel:.
~/tunnel:.erl
Erlang/OTP 19 [erts-8.2] [source] [64-bit] [smp:8:8] [async-threads:10] [hipe] [kernel-poll:false] [dtrace]
Eshell V8.2 (abort with ^G)
1> c(room).
{ok,room}
2> room:go().
{ok,<0.72.0>}
3> room:test().
All 4 tests passed.
ok
4>
答案 0 :(得分：1)
听起来像我的模块s在第一种情况下没有被编译，特别是我们可以看到你在代码工作的编辑中编译它。
错误
=ERROR REPORT==== 29-Jan-2017::17:37:50 ===
Error in process <0.174.0> with exit value:
{undef,[{s,s,[<0.159.0>,update],[]}]}
表示调用模块s和函数s且参数<0.159.0>和update失败，并使用undef。
Erlang将允许您编译一个调用尚未定义的函数的模块，这就是我们tools like xref的原因。