diff options
5 files changed, 27 insertions, 3 deletions
diff --git a/js/src/frontend/Parser.cpp b/js/src/frontend/Parser.cpp index 79b5d70f4..66ada79f2 100644 --- a/js/src/frontend/Parser.cpp +++ b/js/src/frontend/Parser.cpp @@ -1183,6 +1183,12 @@ Parser<ParseHandler>::tryDeclareVar(HandlePropertyName name, DeclarationKind kin *redeclaredKind = Some(declaredKind); return true; } + } else if (kind == DeclarationKind::VarForAnnexBLexicalFunction) { + MOZ_ASSERT(DeclarationKindIsParameter(declaredKind)); + + // Annex B.3.3.1 disallows redeclaring parameter names. + *redeclaredKind = Some(declaredKind); + return true; } } else { if (!scope->addDeclaredName(pc, p, name, kind)) diff --git a/js/src/jit-test/tests/basic/testFunctionStatementAliasLocals.js b/js/src/jit-test/tests/basic/testFunctionStatementAliasLocals.js index 7be49b7f3..be7f528b9 100644 --- a/js/src/jit-test/tests/basic/testFunctionStatementAliasLocals.js +++ b/js/src/jit-test/tests/basic/testFunctionStatementAliasLocals.js @@ -8,9 +8,11 @@ assertEq(typeof f1(true), "function"); assertEq(f1(false), 3); function f2(b, w) { + // Annex B doesn't apply to functions in blocks with the same name as a + // parameter. if (b) function w() {} return w; } -assertEq(typeof f2(true, 3), "function"); +assertEq(typeof f2(true, 3), "number"); assertEq(f2(false, 3), 3); diff --git a/js/src/tests/ecma_6/LexicalEnvironment/block-scoped-functions-annex-b-parameter.js b/js/src/tests/ecma_6/LexicalEnvironment/block-scoped-functions-annex-b-parameter.js new file mode 100644 index 000000000..f0adedf7d --- /dev/null +++ b/js/src/tests/ecma_6/LexicalEnvironment/block-scoped-functions-annex-b-parameter.js @@ -0,0 +1,16 @@ +// Annex B.3.3.1 disallows Annex B lexical function behavior when redeclaring a +// parameter. + +(function(f) { + if (true) function f() { } + assertEq(f, 123); +}(123)); + +(function(f) { + { function f() { } } + assertEq(f, 123); +}(123)); + + +if (typeof reportCompare === "function") + reportCompare(true, true); diff --git a/js/src/tests/js1_8/regress/regress-467495-05.js b/js/src/tests/js1_8/regress/regress-467495-05.js index 505fb6bd6..ecf47b8fe 100644 --- a/js/src/tests/js1_8/regress/regress-467495-05.js +++ b/js/src/tests/js1_8/regress/regress-467495-05.js @@ -20,7 +20,7 @@ function test() printBugNumber(BUGNUMBER); printStatus (summary); - expect = 'function x() {}'; + expect = '1'; function g(x) { if (1) function x() {} return x; } print(actual = g(1) + ''); diff --git a/js/src/tests/js1_8/regress/regress-467495-06.js b/js/src/tests/js1_8/regress/regress-467495-06.js index d8bc81c83..72adeee9e 100644 --- a/js/src/tests/js1_8/regress/regress-467495-06.js +++ b/js/src/tests/js1_8/regress/regress-467495-06.js @@ -32,7 +32,7 @@ function test() var r = f(0); - if (typeof(r[0]) != "function") + if (typeof(r[0]) != "number") actual += "Bad r[0]"; if (typeof(r[1]) != "function") |