diff options
Diffstat (limited to 'lib/compiler/src')
| -rw-r--r-- | lib/compiler/src/sys_core_fold.erl | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/lib/compiler/src/sys_core_fold.erl b/lib/compiler/src/sys_core_fold.erl index feb34b364f..44a6aa425d 100644 --- a/lib/compiler/src/sys_core_fold.erl +++ b/lib/compiler/src/sys_core_fold.erl @@ -1142,7 +1142,13 @@ clause_1(#c_clause{guard=G0,body=B0}=Cl, Ps1, Cexpr, Ctxt, Sub1) -> %% %% case A of NewVar when true -> ... %% - sub_set_var(Var, Cexpr, Sub2); + case cerl:is_c_fname(Cexpr) of + false -> + sub_set_var(Var, Cexpr, Sub2); + true -> + %% We must not copy funs, and especially not into guards. + Sub2 + end; _ -> Sub2 end, |