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| author | Alex Lam S.L <alexlamsl@gmail.com> | 2020-04-18 17:10:24 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-04-19 00:10:24 +0800 |
| commit | f110601fb4bfa8f7b362bcc4a7a8a2f850e5132e (patch) | |
| tree | aeb3ed932b9554f1270dd7a681e6a417548fee84 /lib | |
| parent | 2a508c6e5f1e69e78d84480b5fc3db2f8087c166 (diff) | |
| download | tracifyjs-f110601fb4bfa8f7b362bcc4a7a8a2f850e5132e.tar.gz tracifyjs-f110601fb4bfa8f7b362bcc4a7a8a2f850e5132e.zip | |
enhance `unused` (#3800)
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/compress.js | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/lib/compress.js b/lib/compress.js index 9504241b..b7a91ea5 100644 --- a/lib/compress.js +++ b/lib/compress.js @@ -4200,8 +4200,15 @@ merge(Compressor.prototype, { } else if (sym.orig[0] instanceof AST_SymbolCatch) { var value = def.value && def.value.drop_side_effect_free(compressor); if (value) side_effects.push(value); - def.value = null; - head.push(def); + var var_defs = var_defs_by_id.get(sym.id); + if (var_defs.length > 1) { + AST_Node.warn("Dropping duplicated declaration of variable {name} [{file}:{line},{col}]", template(def.name)); + remove(var_defs, def); + sym.eliminated++; + } else { + def.value = null; + head.push(def); + } } else { var value = def.value && !def.value.single_use && def.value.drop_side_effect_free(compressor); if (value) { |