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-rw-r--r--src/parser.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/parser.cpp b/src/parser.cpp
index 0e971f792..b1a179573 100644
--- a/src/parser.cpp
+++ b/src/parser.cpp
@@ -4573,9 +4573,12 @@ gb_internal Ast *parse_when_stmt(AstFile *f) {
isize prev_level = f->expr_level;
f->expr_level = -1;
+ bool prev_allow_in_expr = f->allow_in_expr;
+ f->allow_in_expr = true;
cond = parse_expr(f, false);
+ f->allow_in_expr = prev_allow_in_expr;
f->expr_level = prev_level;
if (cond == nullptr) {