diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/compiler/src/core_lint.erl | 2 | ||||
| -rw-r--r-- | lib/compiler/src/sys_core_fold.erl | 7 | ||||
| -rw-r--r-- | lib/compiler/test/Makefile | 1 | ||||
| -rw-r--r-- | lib/compiler/test/core_fold_SUITE.erl | 44 | ||||
| -rw-r--r-- | lib/compiler/test/unused_multiple_values_error.core | 11 |
5 files changed, 61 insertions, 4 deletions
diff --git a/lib/compiler/src/core_lint.erl b/lib/compiler/src/core_lint.erl index 8b688df830..1e8983f594 100644 --- a/lib/compiler/src/core_lint.erl +++ b/lib/compiler/src/core_lint.erl @@ -309,7 +309,7 @@ expr(#c_fun{vars=Vs,body=B}, Def, Rt, St0) -> {Vvs,St1} = variable_list(Vs, St0), return_match(Rt, 1, body(B, union(Vvs, Def), any, St1)); expr(#c_seq{arg=Arg,body=B}, Def, Rt, St0) -> - St1 = expr(Arg, Def, any, St0), %Ignore values + St1 = expr(Arg, Def, 1, St0), body(B, Def, Rt, St1); expr(#c_let{vars=Vs,arg=Arg,body=B}, Def, Rt, St0) -> St1 = body(Arg, Def, let_varcount(Vs), St0), %This is a body diff --git a/lib/compiler/src/sys_core_fold.erl b/lib/compiler/src/sys_core_fold.erl index 07b054c5d7..cda3f7d81e 100644 --- a/lib/compiler/src/sys_core_fold.erl +++ b/lib/compiler/src/sys_core_fold.erl @@ -132,7 +132,12 @@ body(Body, Sub) -> body(#c_values{anno=A,es=Es0}, Ctxt, Sub) -> Es1 = expr_list(Es0, Ctxt, Sub), - #c_values{anno=A,es=Es1}; + case Ctxt of + value -> + #c_values{anno=A,es=Es1}; + effect -> + make_effect_seq(Es1, Sub) + end; body(E, Ctxt, Sub) -> ?ASSERT(verify_scope(E, Sub)), expr(E, Ctxt, Sub). diff --git a/lib/compiler/test/Makefile b/lib/compiler/test/Makefile index b9c5be09ce..51b3064589 100644 --- a/lib/compiler/test/Makefile +++ b/lib/compiler/test/Makefile @@ -75,6 +75,7 @@ INLINE= \ CORE_MODULES = \ bs_shadowed_size_var \ + unused_multiple_values_error \ nested_call_in_case diff --git a/lib/compiler/test/core_fold_SUITE.erl b/lib/compiler/test/core_fold_SUITE.erl index c2a592f699..abc9ab6a72 100644 --- a/lib/compiler/test/core_fold_SUITE.erl +++ b/lib/compiler/test/core_fold_SUITE.erl @@ -21,7 +21,8 @@ -export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, init_per_group/2,end_per_group/2, t_element/1,setelement/1,t_length/1,append/1,t_apply/1,bifs/1, - eq/1,nested_call_in_case/1,guard_try_catch/1,coverage/1]). + eq/1,nested_call_in_case/1,guard_try_catch/1,coverage/1, + unused_multiple_values_error/1,unused_multiple_values/1]). -export([foo/0,foo/1,foo/2,foo/3]). @@ -36,7 +37,8 @@ all() -> groups() -> [{p,test_lib:parallel(), [t_element,setelement,t_length,append,t_apply,bifs, - eq,nested_call_in_case,guard_try_catch,coverage]}]. + eq,nested_call_in_case,guard_try_catch,coverage, + unused_multiple_values_error,unused_multiple_values]}]. init_per_suite(Config) -> @@ -289,3 +291,41 @@ cover_is_safe_bool_expr(X) -> end. id(I) -> I. + +unused_multiple_values_error(Config) when is_list(Config) -> + PrivDir = ?config(priv_dir, Config), + Dir = filename:dirname(code:which(?MODULE)), + Core = filename:join(Dir, "unused_multiple_values_error"), + Opts = [no_copt,clint,return,from_core,{outdir,PrivDir} + |test_lib:opt_opts(?MODULE)], + {error,[{unused_multiple_values_error, + [{core_lint,{return_mismatch,{hello,1}}}]}], + []} = c:c(Core, Opts), + ok. + +unused_multiple_values(Config) when is_list(Config) -> + put(unused_multiple_values, []), + [false] = test_unused_multiple_values(false), + [b,a,{a,b},false] = test_unused_multiple_values({a,b}), + ok. + +test_unused_multiple_values(X) -> + ok = do_unused_multiple_values(X), + get(unused_multiple_values). + +do_unused_multiple_values(X) -> + case do_something(X) of + false -> + A = false; + Res -> + {A,B} = Res, + do_something(A), + do_something(B) + end, + _ThisShouldNotFail = A, + ok. + +do_something(I) -> + put(unused_multiple_values, + [I|get(unused_multiple_values)]), + I. diff --git a/lib/compiler/test/unused_multiple_values_error.core b/lib/compiler/test/unused_multiple_values_error.core new file mode 100644 index 0000000000..e06587c936 --- /dev/null +++ b/lib/compiler/test/unused_multiple_values_error.core @@ -0,0 +1,11 @@ +module 'unused_multiple_values_error' ['hello'/1] + attributes [] +'hello'/1 = + fun (_cor0) -> + do + case _cor0 of + <_cor0> when 'true' -> + <'ok','ok'> + end + 'ok' +end |