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authorAlex Lam S.L <alexlamsl@gmail.com>2020-09-15 12:18:12 +0100
committerGitHub <noreply@github.com>2020-09-15 19:18:12 +0800
commitd64d0b0bec426f77e0ca73d2463de3c1a2e71c98 (patch)
tree278cb0c3bbc16184e4789ddd2e6e7c64a38e4ece
parent3ac575f2e81630d560b6353831761a7f11037d93 (diff)
downloadtracifyjs-d64d0b0bec426f77e0ca73d2463de3c1a2e71c98.tar.gz
tracifyjs-d64d0b0bec426f77e0ca73d2463de3c1a2e71c98.zip
fix corner case in `merge_vars` (#4102)
fixes #4101
-rw-r--r--lib/compress.js11
-rw-r--r--test/compress/merge_vars.js29
2 files changed, 40 insertions, 0 deletions
diff --git a/lib/compress.js b/lib/compress.js
index c39c0da6..171746ac 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -4403,6 +4403,17 @@ merge(Compressor.prototype, {
mark(node);
return true;
}
+ if (node instanceof AST_Try) {
+ var save = segment;
+ segment = node;
+ node.body.forEach(function(branch) {
+ branch.walk(tw);
+ });
+ if (node.bcatch) node.bcatch.walk(tw);
+ segment = save;
+ if (node.bfinally) node.bfinally.walk(tw);
+ return true;
+ }
if (node instanceof AST_Unary) {
if (!unary_arithmetic[node.operator]) return;
var sym = node.expression;
diff --git a/test/compress/merge_vars.js b/test/compress/merge_vars.js
index 8ef186cf..076668e5 100644
--- a/test/compress/merge_vars.js
+++ b/test/compress/merge_vars.js
@@ -182,6 +182,35 @@ switch_branch: {
expect_stdout: "PASS"
}
+try_branch: {
+ options = {
+ merge_vars: true,
+ }
+ input: {
+ console.log(function(a) {
+ var b = "FAIL", c;
+ try {
+ a && F();
+ } catch (e) {
+ c = b;
+ }
+ return c || "PASS";
+ }());
+ }
+ expect: {
+ console.log(function(a) {
+ var b = "FAIL", c;
+ try {
+ a && F();
+ } catch (e) {
+ c = b;
+ }
+ return c || "PASS";
+ }());
+ }
+ expect_stdout: "PASS"
+}
+
read_before_assign_1: {
options = {
inline: true,