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Report supported options upon invalid option syntax.
fixes #1883
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Technically not part of ES5, but commonly used code exists in the wild.
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Previous fiix for #1052 perturbs declaration order of functions which leads to incorrect behaviour under "use strict".
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Technically not part of ES5, but commonly used code exists in the wild.
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fix corner cases with `sourceMap`
fixes #1998
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Account for whitespace insertions.
fixes #505
fixes #890
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Use `@key` to `parse()` string value as `AST_Node`.
fixes #1986
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fixes #512
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fixes #1964
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... via semver string on `node_version` label.
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- remove `options.output.unescape_regexps`
- preserve original pattern whenever possible
fixes #54
fixes #1929
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Account for comments when detecting property access in `tokenizer`.
fixes #1943
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fixes #1937
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- fix `estree` conversion of getter/setter
- fix non-directive literal in `to_mozilla_ast()`
- revamp `test/mozilla-ast.js`
- reuse `test/ufuzz.js` for code generation
- use `acorn.parse()` for creating `estree`
- extend `test/ufuzz.js` for `acorn` workaround
- catch variable redefinition
- non-trivial literal as directive
- adjust options for tolerance
Miscellaneous
- optional semi-colon when parsing directives
fixes #1914
closes #1915
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- `reduce_vars`
- `side_effects`
- property access for object
- `AST_SymbolAccessor` as key names
enhance `test/ufuzz.js`
- add object getter & setter
- property assignment to setter
- avoid infinite recursion in setter
- fix & adjust assignment operators
- 50% `=`
- 25% `+=`
- 2.5% each for the rest
- avoid "Invalid array length"
- fix `console.log()`
- bypass getter
- curb recursive reference
- deprecate `-E`, always report runtime errors
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As this is not part of ES5.
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fixes #1922
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- preserve (re)assignment to `const` for runtime error
- suppress `cascade` on `const`, as runtime behaviour is ill-defined
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Travis has gone a lot slower recently, and most test failures are due to time-out on this particular test.
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fixes #1887
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Have `minify()` return `Error` in `result.error` rather than throwing it.
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Re-order `AST_Binary` properties to make dump more readable.
closes #769
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fixes #1872
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Determine if variables with non-constant values can escape and be modified.
fixes #1865
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- extend expression types
- `a++`
- `a=x;`
- extend scan range
- `for(init;;);`
- `switch(expr){case expr:}`
- `a = x; a = a || y;`
- terminate upon `debugger;`
closes #1821
fixes #27
fixes #315
fixes #1858
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Respect "funcs" and "vars" properly.
fixes #1850
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- forbid redeclaration of `this`
- suppress probability for `this` within nested functions
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Only need to avoid `var` within the initialisation block.
fixes #1841
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- `const` without value
- `delete` of expression
- redefining `arguments` or `eval`
extend `test/ufuzz.js`
- optionally generate "use strict"
- improve handling of test cases with syntax errors
- group IIFE generation
- generate bare anonymous functions
- workaround `console.log()` for `new function()`
- generate expressions with `this`
fixes #1810
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fixes #1838
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- deep cloning of `AST_LabeledStatement`
- `L:do{...}while(false)`
- empty statement with label within block
extend `test/ufuzz.js`
- generate labels for blocks & loops
- generate for-in statements
- skip suspicious option search if `minify()` errs
fixes #1833
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- extract leading value with side-effects out of `var` statement
- reduce scanning of `AST_Definitions` from 3 passes to just once
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fixes #1830
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Perform the same cascaded scanning within `var` statement as we do on array of statements.
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fixes #1825
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fixes #27
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- remove overlap in functionality of singular, consecutive reference of constant value
- remove workarounds for previous bugs in `lib/scope.js`
- distribute recursive `collapse_single_use_vars()` calls to their respective `OPT(AST_Node)`
- enable collapsing of variables within a single `AST_Definitions`
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`var a=1;a=2;x(a)` => `x(2)`
fix pre-existing issues
- reference counting on assignment
- walking of anonymous functions
- chained assignment
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Side effects of `&&` and `||` have not mattered until #1814, which takes assignment expressions into account.
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These are surprisingly common, as people reuse the same variable name within loops or switch branches.
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Possible partial execution due to exceptions.
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- allow immediate assignment after declaration of variable
- relax modification rule for immutable value
- fix order of visit for TreeWalker
- remove extraneous code
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- let `collapse_vars` take care of value containing any symbols
- improve overhead accounting
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